Metallic materials

Abstract

This invention provides a metallic material with excellent damage resistance and excellent corrosion resistance. The metallic material (1) disclosed herein comprises: a metallic substrate (10), a bottom resin layer (20) formed on the metallic substrate (10), and an outermost resin layer (30) formed on the bottom resin layer (20). The hardness HL of the bottom resin layer (20) is 0.18 GPa or higher. The hardness HH of the outermost resin layer (30) satisfies equation (1), and the thickness TL (μm) of the bottom resin layer and the thickness TH (μm) of the outermost resin layer satisfy equation (2).

Description

Metal materials The present disclosure relates to a metal material, and more particularly to a metal material having a resin layer formed on its surface. Products such as building materials, automobiles, and electrical machinery (hereinafter referred to as "building materials, etc.") sometimes require creativity. Recently, there has been a trend, particularly in Europe and the United States, where a natural aesthetic is preferred, to favor materials that utilize the texture of metal. When utilizing this texture, corrosion-resistant metal sheets such as stainless steel and aluminum are often used. Furthermore, to further enhance the metallic feel of stainless steel and aluminum, metal sheets with surface textures, typically hairline patterns, are also available. Furthermore, because stainless steel and aluminum sheets are expensive, metal sheets with surface coatings have been developed as an alternative to stainless steel and aluminum sheets. Like stainless steel and aluminum sheets, metal sheets with coatings have moderate corrosion resistance. Furthermore, metal sheets with coatings have an excellent metallic texture. Furthermore, if textures are formed on the surface of the coating, excellent originality is achieved. Therefore, metal sheets with coatings, like stainless steel and aluminum sheets, are suitable for applications such as building materials. Metal materials used as building materials, such as metal plates, are formed into predetermined shapes through processes such as die pressing. During die pressing and other processes, burrs or chips may sometimes form on the ends of the metal materials. If burrs or chips collide with or come into contact with the surface of the metal material, scratches may sometimes form on the surface of the metal material. In addition, when metal materials are used indoors, utensils and the like may collide with or come into contact with the surface of the metal material. Furthermore, when metal materials are used outdoors, flying objects such as small stones or metal pieces may collide with or come into contact with the surface of the metal material. In the following description, burrs, chips, utensils, small stones, and metal pieces are collectively referred to as "flying objects, etc." As described above, the collision or contact of such flying objects may sometimes cause scratches on the surface of the metal material. The generation of scratches reduces the corrosion resistance of the metal material. Therefore, metal materials used as building materials are required to have not only excellent corrosion resistance but also excellent damage resistance. Therefore, in order to obtain excellent corrosion resistance and excellent scratch resistance in metal materials, some people have proposed a technology of forming a resin layer on the surface of the metal material. For example, in the metal material disclosed in Japanese Patent Application Laid-Open No. 2006-124824 (Patent Document 1), a zinc-plated steel sheet is subjected to hairline processing, and then a transparent resin coating is formed on the surface of the hairline zinc-plated layer. In the metal material disclosed in Patent Document 1, the transparent resin coating allows the surface of the plating layer to be visible, thereby improving originality, and also enhances corrosion resistance and damage resistance. Furthermore, in the metal material disclosed in Japanese Patent Application Publication No. 2013-536901 (Patent Document 2), a zinc-plated steel sheet is rolled to form a texture on the surface of the zinc-plated layer, and then the surface of the zinc-plated layer is coated with an organic film (resin) having a surface roughness within a certain range. The metal material disclosed in Patent Document 2 maintains corrosion resistance while allowing the surface of the plating layer to be visible, thereby enhancing the originality. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Application Publication No. 2006-124824 [Patent Document 2] Japanese Patent Application Publication No. 2013-536901 [Problem to be Solved by the Invention] The metal materials described in Patent Documents 1 and 2 have sufficient corrosion resistance and improved scratch resistance. However, by using methods other than those disclosed in Patent Documents 1 and 2, it is possible to achieve excellent visual quality, excellent corrosion resistance, and excellent scratch resistance in metal materials. The present invention aims to provide a metal material having excellent corrosion resistance and excellent damage resistance. [Technical Means for Solving the Problem] The metal material disclosed herein comprises a metal substrate, a base resin layer, and a top resin layer. The base resin layer is formed on the metal substrate. The top resin layer is formed as the top layer on the base resin layer. The hardness HL of the base resin layer is greater than 0.18 GPa. The hardness HH of the top resin layer satisfies equation (1). The thickness TL (μm) of the base resin layer and the thickness TH (μm) of the top resin layer satisfy equation (2). [Effects of the Invention] The metal material disclosed herein has excellent corrosion resistance and excellent damage resistance. The present inventors have studied metal materials having excellent corrosion resistance and excellent damage resistance. First, similar to Patent Documents 1 and 2, the present inventors attempted to improve excellent corrosion resistance and excellent scratch resistance by forming a resin layer on the surface of a metal material. They found that sufficient corrosion resistance was achieved by forming the resin layer thicker than 3.0 μm. However, when a resin layer is formed on the surface of a metal material, it is known that while sufficient corrosion resistance is achieved, scratches may occur on the metal surface. A scratched resin layer also reduces the corrosion resistance of the metal material. Therefore, the present inventors have investigated methods for improving the scratch resistance of the resin layer. The inventors first considered hardening the resin layer. A hardened resin layer could potentially prevent flying objects like burrs, shavings, utensils, small stones, and metal pieces from piercing the resin layer, even if they contacted the surface. However, simply increasing the hardness of the resin layer could still cause scratches on the resin layer and the metal material. Therefore, the inventors conducted further research. As a result, they made the following discoveries. In metal materials with increased resin layer hardness, if the tip of a flying object presses into the resin layer, the resin layer may exceed the plastic deformation threshold and break, or the resin layer may peel away from the metal material. This phenomenon occurs because the increased hardness of the resin layer makes it unable to adequately cushion the external force applied when the tip of the flying object collides with or contacts the resin layer. Therefore, the present inventors have investigated methods for buffering the external forces exerted on the resin layer by flying objects when they collide with or contact the resin layer. Reducing the hardness of the resin layer increases the tolerance for plastic deformation. Therefore, when the tip of a flying object is pressed into the resin layer, it is possible to prevent the resin layer from exceeding the plastic deformation threshold and causing damage, or from peeling off from the metal material. Based on the above research results, the present inventors evaluated the scratch resistance of a resin layer formed on the surface of a metal material by reducing its hardness. Their results showed that while simply reducing the hardness of the resin layer prevented damage or peeling of the resin layer caused by flying objects striking or contacting the resin layer, the tip of the flying object that struck or contacted the resin layer could sometimes pierce the resin layer, causing scratches on the metal surface. Therefore, the present inventors considered that sufficient scratch resistance could not be obtained when the resin layer was constructed as a single layer. In addition, the present inventors considered not to construct the resin layer as a single layer, but to construct the resin layer as a plurality of layers with different functions. First, the inventors considered forming the resin layer from a base resin layer formed on a metal substrate and a topmost resin layer formed on the base resin layer and forming the outermost layer. Furthermore, they considered hardening the topmost resin layer, which is subject to impact or contact from flying objects, while making the base resin layer softer than the topmost resin layer to improve damage resistance. In this configuration, the base resin layer serves to cushion the topmost resin layer from impact or contact from flying objects. Meanwhile, the topmost resin layer protects against impact or contact from flying objects. However, in the case of the above-mentioned structure, it can be seen that sufficient damage resistance cannot be obtained, resulting in a decrease in the corrosion resistance of the metal material. The reason for this can be considered as follows. When the outermost resin layer is hardened and the bottom resin layer is constructed to be softer than the outermost resin layer, when the outermost resin layer cannot fully withstand the impact or contact of flying objects, the outermost resin layer will be damaged by the flying objects. In this case, the bottom resin layer, which is softer than the outermost resin layer, cannot play a protective role against flying objects. As a result, flying objects penetrate the bottom resin layer and reach the surface of the metal material, causing scratches. Based on these findings, the present inventors considered constructing the outermost resin layer, which is subject to collision or contact with flying objects, to be softer than the underlying resin layer. In this case, the outermost resin layer acts to cushion the external forces caused by collision or contact with flying objects. Meanwhile, the underlying resin layer, which is harder than the outermost resin layer, acts to deflect the impacted flying objects, providing protection. The present inventors considered that this combination could improve the damage and corrosion resistance of the metal material. Therefore, the present inventors further investigated the relationship between the hardness HL (GPa) of the base resin layer and the hardness HH (GPa) of the outermost resin layer, and the scratch resistance and corrosion resistance. As a result, the present inventors discovered that excellent scratch resistance and corrosion resistance can be achieved in a metal material when the hardness HL of the base resin layer is set to 0.18 GPa or higher, the hardness HH of the outermost resin layer satisfies equation (1), and the thickness TL (μm) of the base resin layer and the thickness TH (μm) of the outermost resin layer satisfy equation (2). The metal material disclosed herein is completed by the above-mentioned technical ideas and has the following structure. The metal material system of the first configuration includes a metal substrate, a base resin layer, and an outermost resin layer. The base resin layer is formed on the metal substrate. The outermost resin layer is formed as an outermost layer on the base resin layer. The hardness HL of the base resin layer is greater than or equal to 0.18 GPa. The hardness HH of the outermost resin layer satisfies equation (1). The thickness TL (μm) of the base resin layer and the thickness TH (μm) of the outermost resin layer satisfy equation (2). In the metal material of the first structure, a topmost resin layer having a lower hardness than the bottom resin layer is formed on the bottom resin layer. Therefore, when a flying object collides with or contacts the metal material, the topmost resin layer having a lower hardness than the bottom resin layer will buffer the external force generated by the collision or contact. In addition, the bottom resin layer having a higher hardness than the topmost resin layer will bounce back the front end of the flying object after the force has been buffered. By setting the hardness HL of the bottom resin layer to be greater than 0.18 GPa and making the hardness HH of the topmost resin layer satisfy formula (1), the topmost resin layer with low hardness and the bottom resin layer with high hardness inhibit the front end of the flying object from penetrating the bottom resin layer and forming scratches on the metal material. As a result, excellent damage resistance is obtained in the metal material. Furthermore, by making the thickness TL (μm) of the bottom resin layer and the thickness TH (μm) of the topmost resin layer satisfy formula (2), excellent corrosion resistance is obtained. The metal material of the second configuration is the same as the metal material of the first configuration, wherein the hardness HH of the outermost resin layer is greater than or equal to 0.13 GPa. In the metal material of the second configuration, the scratch resistance is further improved. The metal material of the third configuration is the same as the metal material of the first configuration, wherein the thickness TL of the underlying resin layer is greater than 0.5 μm. In the metal material of the third configuration, the scratch resistance is further improved. The metal material of the fourth configuration is the same as the metal material of the first configuration, wherein the thickness TH of the outermost resin layer is greater than or equal to 2.0 μm. In the metal material of the fourth configuration, corrosion resistance and scratch resistance are further improved. The metal material of the fifth configuration is the same as the metal material of the first configuration, wherein the thickness TL and the thickness TH satisfy the formula (3). In the metal material of the fifth configuration, creativity is further enhanced. The metal material of the sixth configuration is the same as the metal material of the first configuration, wherein the thickness TL and the thickness TH satisfy the formula (4). In the metal material of the sixth configuration, the scratch resistance is further improved. The metal material of the seventh embodiment is similar to the metal material of the first embodiment, wherein the metal material further comprises a plating layer. The plating layer is formed on the metal substrate. The base resin layer is formed on the plating layer. In the metal material of the seventh configuration, more excellent corrosion resistance is obtained. The metal material of the eighth configuration is the metal material of the seventh configuration, wherein the metal substrate is a steel material. The plating layer is composed of one or more selected from the group consisting of Zn plating, Zn-Ni alloy plating, Zn-Fe plating, Zn-Co plating, Zn-Al plating, Zn-Fe-Al plating, Al-Si plating, and Zn-Al-Mg plating. In the metal material of the eighth configuration, a plating layer having a sacrificial corrosion protection function is formed, thereby further improving the corrosion resistance. The metal material of the ninth embodiment is the same as the metal material of the first embodiment, wherein the base resin layer comprises an organic resin and an inorganic pigment. The organic resin is composed of at least one selected from the group consisting of polyester, urethane, and melamine. The inorganic pigment is composed of BaSO 4. SiO 2. ZrO, TiO 2 and ZnO. In the metal material of the ninth embodiment, the hardness HL of the base resin layer can be adjusted to 0.18 GPa or more by using an inorganic pigment. The metal material of the tenth configuration is the same as the metal material of the first configuration, wherein the outermost resin layer contains an organic resin composed of at least one selected from the group consisting of polyester and melamine. The metal material of the eleventh configuration is the metal material of the first configuration, wherein a texture is formed on the surface of the metal material. In the metal material of the eleventh configuration, the creativity is further improved. The metal material of the twelfth embodiment is the metal material of the seventh embodiment, wherein a texture is formed on the surface of the plating layer. In the metal material of the twelfth configuration, creativity is further improved. The metal material of the 13th constitution is the metal material of the 11th or 12th constitution, wherein the texture is a hairline texture. In the metal material of the 13th configuration, the creativity is further improved. The metal material of the fourteenth embodiment is the same as the metal material of the first embodiment, wherein the metal material further comprises an anodic oxide film. The anodic oxide film is formed on the metal substrate. The base resin layer is formed on the anodic oxide film. In the metal material of the fourteenth configuration, the corrosion resistance is further improved. The following is a detailed description of the metal material of this embodiment. <1. About Metal Material 1> Figure 1 is a cross-sectional view of metal material 1 perpendicular to the rolling direction of this embodiment. In Figure 1, the rolling direction of metal material 1 is defined as the L direction. The thickness direction of metal material 1 is defined as the T direction. In metal material 1, the direction perpendicular to the L and T directions (i.e., the width direction of metal material 1) is defined as the W direction. 1 , the metal material 1 of the present embodiment comprises: a metal substrate 10, a plating layer 11, a bottom resin layer 20, and a top resin layer 30. The metal substrate 10 is a component that serves as the base material of the metal material 1. The bottom resin layer 20 and the top resin layer 30 improve the corrosion resistance and damage resistance of the metal material 1. As shown in FIG2 , the metal material 1 of the present embodiment may also comprise a metal substrate 10, a bottom resin layer 20, and a top resin layer 30, but not comprise a plating layer 11. That is, in the metal material 1 of the present embodiment, the plating layer 11 is of an arbitrary configuration. The following describes the metal substrate 10, the plating layer 11, the bottom resin layer 20, and the top resin layer 30. <2. About Metal Substrate 10> The metal substrate 10 is a member that serves as the base material of the metal material 1. The metal substrate 10 can be made of any metal that meets the mechanical properties required of the metal material 1 (e.g., tensile strength, workability, etc.). In other words, the type of metal substrate 10 is not particularly limited. Examples of the metal substrate 10 include steel, aluminum, aluminum alloys, and titanium alloys. The shape of the metal substrate 10 is not particularly limited. Examples of the metal substrate 10 include plates, rods, and tubes. When the metal substrate 10 is a steel plate, the type of the steel plate may be, for example, SPHC, SPHD, SPHE, SPCC, SPCD, SPCF, etc., as specified in the JIS standard (JIS G 3131:2018). When the metal substrate 10 is an aluminum plate, the type of the aluminum plate may be, for example, A1050P, A1080P, A1070P, A1100P, etc., as specified in the JIS standard (JIS H 4000:2014). When the metal substrate 10 is an aluminum alloy plate, the type of the aluminum alloy plate may be, for example, A2014P, A3003P, A3104P, A5005P, etc., as specified in the JIS standard (JIS H 4000:2014). <3. Regarding the Plating Layer 11> As described above, the plating layer 11 is an optional component of the metal material 1 of this embodiment. That is, the metal material 1 may or may not include the plating layer 11. When the metal material 1 includes the plating layer 11, the corrosion resistance of the metal material 1 is further improved. The plating layer 11 is, for example, a Ni-based plating layer, a Cu-based plating layer, a zinc-based plating layer (Zn-based plating layer), an Au-based plating layer, a Sn-based plating layer, an Al-based plating layer, and an alloy plating layer containing one or more of Ni, Cu, Zn, Au, Sn, and Al. The so-called X-based plating layer (X is one of Ni, Cu, Zn, Au, Sn, and Al) means a plating layer mainly composed of X. The so-called "mainly composed of X" means that the content of X as the main component element in the plating layer is at least 50% by mass. For example, a zinc-based plating layer means a plating layer with a Zn content of 50% by mass or more. When the metal substrate 10 is a steel material, the coating layer 11 is preferably composed of at least one selected from the group consisting of a zinc-based coating layer and an aluminum-based coating layer. Zn and Al are base metals compared to Fe. Therefore, the zinc-based coating layer and the aluminum-based coating layer provide a sacrificial corrosion protection function against the steel metal substrate 10. As a result, excellent corrosion resistance is achieved. The zinc-based plating layer may be a plating layer composed of zinc plating or a plating layer composed of zinc alloy plating. The zinc-based plating layer can be formed by a well-known plating process. For example, the zinc-based plating layer can be formed by either electroplating or hot-dip plating. The zinc-based plating layer is a concept that includes zinc electroplating layer, zinc alloy electroplating layer, zinc hot-dip plating layer, and alloyed zinc hot-dip plating layer. The zinc-based plating layer only needs to have a well-known chemical composition. The preferred Zn content in the chemical composition of the zinc-based plating layer is 65% by mass or greater. When the Zn content is 65% by mass or greater, the corrosion resistance of the metal material 1 is significantly improved while significantly sacrificing the corrosion protection function. The preferred lower limit of the Zn content in the chemical composition of the zinc-based plating layer is 70% by mass, more preferably 80% by mass. The chemical composition of the zinc-based plating layer preferably contains one or more elements selected from the group consisting of Al, Fe, Co, Cr, Cu, Ni, P, Si, Sn, Mg, Mn, Mo, V, W, Zr, Ca, Y, La, Ce, Bi, In, Ti, V, Nb, Cu, Mn, Sr, Sb, Pb, and B, and Zn. Furthermore, when the zinc-based plating layer is an electroplated zinc layer, the chemical composition of the zinc-based plating layer more preferably contains a total of 5 to 20% by mass of one or more elements selected from the group consisting of Fe, Ni, and Co. When the zinc-based plating layer is a hot-dip zinc plating layer, the chemical composition of the zinc-based plating layer more preferably contains a total of 5 to 49% by mass of one or more elements selected from the group consisting of Mg, Al, and Si. In these cases, the zinc-based plating layer exhibits even better corrosion resistance. The zinc-based plating layer is preferably composed of Zn-Ni alloy plating. Zn-Ni alloy plating has excellent corrosion resistance and high hardness. Therefore, Zn-Ni alloy plating is suitable as the zinc-based plating layer. When the chemical composition of the Zn-Ni alloy plating is 100% by mass, the preferred Ni content is 10 to 20% by mass. In this case, the Zn-Ni alloy plating system becomes a single γ phase. Therefore, the hardness of the Zn-Ni alloy plating is further improved. The more preferred lower limit of the Ni content is 11% by mass, more preferably 12% by mass, and more preferably 14% by mass. The more preferred upper limit of the Ni content is 18% by mass, more preferably 17% by mass, and more preferably 16% by mass. The zinc-based plating layer may also contain impurities. Impurities are those that are mixed into the raw materials or accidentally introduced during the manufacturing process. Examples of impurities include Ti, B, S, N, C, Nb, Pb, Cd, Ca, Pb, Y, La, Ce, Sr, Sb, O, F, Cl, Ag, and H. The total impurity content in the chemical composition of the plating layer 11 is preferably 1% or less. The plating layer is more preferably composed of one or more selected from the group consisting of Zn plating, Zn-Ni alloy plating, Zn-Fe plating, Zn-Co plating, Zn-Al plating, Zn-Fe-Al plating, Al-Si plating and Zn-Al-Mg plating. Zn-Ni plating has a chemical composition with a Zn content of 50 mass% or more and a Ni content of 9 mass% or more. Zn-Fe plating has a chemical composition with a Zn content of 50 mass% or more and a Fe content of 10 mass% or more. Zn-Co plating has a chemical composition with a Zn content of 50 mass% or more and a Co content of 0.1 mass% or more. Zn-Al plating has a chemical composition with a Zn content of 50 mass% or more and an Al content of 0.1 mass% or more. Zn-Fe-Al plating has a chemical composition with a Zn content of 50 mass% or more, a Fe content of 8.0 mass% or more, and an Al content of 0.1 mass% or more. Zn-Al-Mg plating has a chemical composition with a Zn content of 50 mass% or more, an Al content of 1.0 mass% or more, and a Mg content of 0.5 mass% or more. Al-Si plating has a chemical composition with an Al content of 50 mass% or more and a Si content of 2 mass% or more. [3.1. Method for determining the chemical composition of the plating layer 11] The chemical composition of the plating layer 11 is determined, for example, by the following method. A test piece containing the plating layer 11 and containing the surface of the plating layer 11 is prepared from the metal material 1. In the test piece, a cross section perpendicular to the surface of the plating layer 11 is used as the observation surface. After the test piece is embedded in the resin, the observation surface of the test piece is mirror-polished. After polishing, any 10 fields of view in the plating layer 11 within the observation surface are selected. Each field of view is set to 0.5μm×0.5μm. In each field of view, surface analysis is performed by energy dispersive X-ray spectrometry (EDS). The content of the elements contained in each measurement field of view is determined by surface analysis of EDS. In EDS surface analysis, the accelerating voltage was set to 15 kV, and the target elements were set to Zn, Al, Co, Cr, Cu, Fe, Ni, P, Si, Sn, Mg, Mn, Mo, V, W, and ZrTi, B, S, N, C, Nb, Pb, Cd, Ca, Pb, Y, La, Ce, Sr, Sb, O, F, Cl, Ag, and H for quantification. The arithmetic mean of the content of each element obtained at 10 locations is calculated. If the obtained Zn content (arithmetic mean) is 50 mass % or more, the plated layer 11 to be measured is determined to be a zinc-based plated layer. [3.2. Texture TX] Referring to Figure 3 , a texture TX may be formed on the surface 10S of the metal substrate 10 or the surface 11S of the plating layer 11 (hereinafter referred to as "the metal surface S"). Texture TX refers to a concave-convex pattern formed on the metal surface S by physical or chemical means. Texture TX is a three-dimensional concave-convex pattern on the metal surface S. Texture TX further enhances the creativeness of the metal material 1. The texture TX is, for example, a well-known hairline texture, embossing, dot pattern, random pattern, matte (sandblasting), hammer pattern (hammer pattern), cloth print (satin pattern), etc. The texture TX is preferably a hairline texture. The texture TX may be formed on a portion of the metal surface S, that is, may be formed on the entire metal surface S. That is, a portion of the metal surface S may have an area where the texture TX is not formed. <4. Regarding the Base Resin Layer 20 and the Outermost Resin Layer 30> The base resin layer 20 and the outermost resin layer 30 enhance the corrosion resistance and damage resistance of the metal material 1. Specifically, the hardness HL of the base resin layer 20 is 0.18 GPa or greater. Furthermore, the hardness HH of the outermost resin layer 30 satisfies equation (1), and the thickness TL (μm) of the base resin layer 20 and the thickness TH (μm) of the outermost resin layer 30 satisfy equation (2). These matters are described below. [4.1. Hardness HL of the Base Resin Layer 20] The base resin layer 20 has a protective function of repelling the front end of a flying object after the external force has been buffered by the outermost resin layer 30 . If the hardness HL of the base resin layer 20 is less than 0.18 GPa, sufficient protection cannot be achieved. Therefore, if a flying object collides with or contacts the surface of the outermost resin layer 30 of the metal material 1, the tip of the object may reach the metal surface S and cause scratches. In this case, the damage resistance of the metal material 1 is reduced. Therefore, the hardness HL of the base resin layer 20 is set to 0.18 GPa or higher. The preferred lower limit of the hardness HL of the base resin layer 20 is 0.19 GPa, more preferably 0.20 GPa, more preferably 0.21 GPa, more preferably 0.22 GPa, and even more preferably 0.23 GPa. The upper limit of the hardness HL of the base resin layer 20 is not particularly limited. To further improve the processability of the base resin layer 20, the preferred upper limit of the hardness HL is 0.38 GPa, more preferably 0.36 GPa, more preferably 0.35 GPa, more preferably 0.33 GPa, and even more preferably 0.30 GPa. [4.2. Regarding Formula (1)] The hardness HL of the base resin layer 20 and the hardness HH of the outermost resin layer 30 satisfy Formula (1). When the hardness HL of the bottom resin layer 20 and the hardness HH of the top resin layer 30 satisfy formula (1), the top resin layer 30, which has a lower hardness than the bottom resin layer 20, fully buffers the external force generated by the collision or contact of flying objects. Furthermore, the bottom resin layer 20, which has a higher hardness than the top resin layer 30, bounces back the front end of the flying object after the force has been buffered. In this way, by combining the bottom resin layer 20 and the top resin layer 30 that satisfy formula (1), the protective function of the bottom resin layer 20 and the buffering function of the top resin layer 30 are fully exerted. Therefore, the front end of the flying object is prevented from penetrating the bottom resin layer 20 and forming a scratch on the metal surface S. As a result, excellent damage resistance is obtained in the metal material 1. The preferred upper limit of HH / HL is 0.89, more preferably 0.88, more preferably 0.86, more preferably 0.84, more preferably 0.82, and more preferably 0.80. The preferred lower limit of HH / HL is 0.38, more preferably 0.40, more preferably 0.45, more preferably 0.50, more preferably 0.55, more preferably 0.60, more preferably 0.65, and more preferably 0.70. [4.3. Preferred Lower Limit of Hardness HH of Outermost Resin Layer 30] The hardness HH of the outermost resin layer 30 is preferably 0.13 GPa or higher. In this case, the scratch resistance of the metal material 1 is further improved. The preferred lower limit of the hardness HH of the outermost resin layer 30 is 0.15 GPa, more preferably 0.16 GPa, more preferably 0.18 GPa, and even more preferably 0.20 GPa. There is no particular upper limit to the hardness HH of the outermost resin layer 30. To further improve the processability of the outermost resin layer 30, the preferred upper limit of the hardness HH is 0.30 GPa, more preferably 0.28 GPa, more preferably 0.26 GPa, more preferably 0.25 GPa, and even more preferably 0.24 GPa. [4.4. Regarding Formula (2)] The thickness TL (μm) of the base resin layer 20 and the thickness TH (μm) of the outermost resin layer 30 satisfy Formula (2). TL + TH refers to the total thickness of the resin layers (base resin layer 20 and outermost resin layer 30). TL + TH is associated with the corrosion resistance of metal material 1. If TL + TH satisfies equation (2), the resin layers (base resin layer 20 and outermost resin layer 30) are sufficiently thick. Consequently, excellent corrosion resistance is achieved in metal material 1. The preferred lower limit of TL+TH is 3.2 μm, more preferably 3.5 μm, more preferably 3.8 μm, more preferably 4.0 μm, more preferably 4.3 μm, and more preferably 4.5 μm. [4.5. About Formula (3)] The total thickness TL + TH of the resin layers (the bottom resin layer 20 and the outermost resin layer 30 ) preferably satisfies Formula (3). If TL+TH is less than 20.0 μm, when a texture TX represented by hairline texture is formed on the metal surface S (the surface 10S of the metal substrate 10 or the surface 11S of the plating layer 11), when the metal material 1 is visually observed, the originality of the texture TX is sufficiently high even through the base resin layer 20 and the outermost resin layer 30. Both the bottom resin layer 20 and the outermost resin layer 30 are light-transmissive. "Light-transmissive" here means that the metal surface S can be seen when the metal material 1 is placed under an environment equivalent to sunlight at noon on a sunny day (illuminance of approximately 65,000 Lux). The more preferred upper limit of TL+TH is 19.8 μm, more preferably 19.0 μm, more preferably 18.0 μm, more preferably 17.0 μm, more preferably 16.0 μm, more preferably 15.0 μm, more preferably 14.0 μm, more preferably 13.0 μm, and more preferably 12.0 μm. [4.6. Regarding Formula (4)] The thickness TL of the bottom resin layer 20 and the thickness TH of the outermost resin layer 30 preferably satisfy Formula (4). TH / TL is related to damage resistance. If TH / TL is 1.3 or greater, the outermost resin layer 30 is sufficiently thicker than the underlying resin layer 20. In this case, the cushioning effect of the outermost resin layer 30 is fully exerted, resulting in further improved damage resistance of the resin layers (underlying resin layer 20 and outermost resin layer 30). The preferred lower limit of TH / TL is 1.4, more preferably 1.5, more preferably 1.6, more preferably 1.7, more preferably 1.8, and more preferably 1.9. The preferred upper limit of TH / TL is 16.0, more preferably 12.0, more preferably 10.0, more preferably 9.0, more preferably 7.0, and more preferably 6.0. [4.7. Preferred Thickness TL of the Undercoat Resin Layer 20] The thickness TL (μm) of the undercoat resin layer 20 is preferably 0.5 μm or greater. A thickness TL of 0.5 μm or greater further enhances the protective function of the undercoat resin layer 20, further improving damage resistance. Therefore, a thickness TL of 0.5 μm or greater is preferred. A more preferred lower limit of the thickness TL is 0.8 μm, more preferably 1.0 μm, more preferably 1.2 μm, more preferably 1.4 μm, and more preferably 1.6 μm. A more preferred upper limit of the thickness TL is 8.5 μm, more preferably 8.0 μm, more preferably 7.5 μm, more preferably 7.0 μm, more preferably 6.5 μm, more preferably 6.0 μm, more preferably 5.5 μm, and more preferably 5.0 μm. [4.8. Preferred Thickness TH of the Outermost Resin Layer 30] The thickness TH (μm) of the outermost resin layer 30 is preferably 2.0 μm or greater. When the thickness TH of the outermost resin layer 30 is 2.0 μm or greater, the outermost resin layer 30 further enhances its cushioning effect. This further improves damage resistance. Therefore, the preferred thickness TH is 2.0 μm or greater. A more preferred lower limit of the thickness TH is 2.2 μm, more preferably 2.5 μm, more preferably 3.0 μm, more preferably 3.5 μm, and more preferably 4.0 μm. A more preferred upper limit of the thickness TH is 15.0 μm, more preferably 14.5 μm, more preferably 14.0 μm, more preferably 13.5 μm, more preferably 13.0 μm, more preferably 12.5 μm, more preferably 12.0 μm, more preferably 10.0 μm, more preferably 9.0 μm, and more preferably 8.5 μm. [4.9. Regarding the method for measuring the hardness HL and thickness TL of the bottom resin layer 20, and the hardness HH and thickness TH of the outermost resin layer 30] The method for measuring the hardness HL (GPa) and thickness TL (μm) of the bottom resin layer 20, and the hardness HH (GPa) and thickness TH (μm) of the outermost resin layer 30 is as described below. The test piece is collected, including a cross section parallel to the surface normal of the metal material 1, the surface of the metal material 1, the bottom resin layer 20, and the top resin layer 30. Within the surface of the test piece, the cross section parallel to the surface normal of the metal material 1 is defined as the observation surface. The observation surface of the test piece was cut using a microtome in a direction perpendicular to the depth direction of the metal material 1 until the effects of shearing and cutting, such as edge collapse, were eliminated, revealing a smooth observation surface. On the observation surface of the microtome-cut test piece, the hardness (GPa) was measured by nanoindentation at measurement points spaced 0.2 μm apart in the depth direction of the metal material 1, from the surface of the metal material 1 (i.e., the surface of the outermost resin layer 30) to the interface between the underlying resin layer 20 and the metal surface S. The positions of the measurement points were offset in the width direction perpendicular to the depth direction of the metal material 1 on the observation surface so that the indentations described later at adjacent measurement points did not overlap. At each measurement point, hardness was measured using a nanoindenter. Specifically, a Berkovich indenter was used according to ISO 14577 to measure the hardness of each measurement point using nanoindentation. The load during measurement was set to 200 μN, the load time was 5 seconds, the hold time was 2 seconds, and the load removal time was 5 seconds. An example of a nanoindenter is the Hysitron TI 980 manufactured by Bruker. The above-mentioned hardness measurement is carried out at 100 locations arranged at a spacing of 100 μm on any line segment on the surface of the metal material 1. Among the hardness values ​​obtained at the 10 measurement points at the same depth position from the surface of the outermost resin layer 30, the hardness value of the measurement point where the indentation can be clearly confirmed is selected. If the indentation shape is the same as the projection shape of the indenter and the edge of the outer edge of the indentation shape is not damaged, it is judged that the indentation is obvious. Among the selected hardness values, the four hardness values ​​with the highest values ​​are selected in order from the highest hardness values. And the arithmetic mean of the four selected hardness values ​​is calculated. The obtained value is defined as the hardness at the depth position (GPa). The hardness value obtained by arithmetic averaging is set to the value of the second decimal place obtained by rounding off the third decimal place. The relationship between the hardness at each depth position and the depth position is plotted. In the resulting graph, the depth position where the hardness changes discontinuously is identified as the interface between the base resin layer 20 and the outermost resin layer 30 . Based on the identified interface, the arithmetic mean of the hardness of all measurement points within the range of the base resin layer 20 is defined as the hardness HL (GPa) of the base resin layer 20. In addition, based on the identified interface, the arithmetic mean of the hardness of all measurement points within the range of the outermost resin layer 30 is defined as the hardness HH (GPa) of the outermost resin layer 30. Furthermore, based on the identified interface, the thickness TL (μm) of the base resin layer 20 and the thickness TH (μm) of the outermost resin layer 30 are calculated. Specifically, the arithmetic mean of the thickness of the base resin layer 20 obtained at the above 10 locations is defined as the thickness TL (μm) of the base resin layer 20. The arithmetic mean of the thickness of the outermost resin layer 30 obtained at the above 10 locations is defined as the thickness TH (μm) of the outermost resin layer 30. [4.10. Preferred Chemical Composition of Base Resin Layer 20] Base resin layer 20 has a higher hardness than top resin layer 30. Top resin layer 30 provides a protective function by being able to withstand impact or contact with impacting objects, etc. The base resin layer 20 preferably has the following chemical composition. The base resin layer 20 preferably contains an organic resin and an inorganic pigment. The organic resin is, for example, composed of one or more selected from the group consisting of well-known natural resins and well-known synthetic resins. The organic resin is, for example, composed of one or more selected from the group consisting of epoxy resins, urethane resins, polyester resins, phenolic resins, polyether sulfone resins, melamine alkyd resins, acrylic resins, polyamide resins, polyimide resins, polysilicone resins, polyvinyl acetate resins, polyolefin resins, polystyrene resins, vinyl chloride resins, and vinyl acetate resins. The organic resin is preferably composed of at least one selected from the group consisting of polyester resins, urethane resins, and melamine resins. Metal material 1 is typically used indoors or outdoors after undergoing cold working such as bending. Therefore, the base resin layer 20 is required to exhibit properties such as ductility, elongation, hardness, chemical resistance, and water resistance. Polyester resins and urethane resins excel in these properties. Furthermore, melamine resins exhibit excellent chemical resistance and hardness. Melamine resins further react with the functional groups of polyester resins and urethane resins to further increase the degree of crosslinking. Therefore, the organic resin of the base resin layer 20 is preferably composed of at least one of polyester resins and urethane resins, and melamine resin. Inorganic pigments such as BaSO 4. SiO 2. ZrO, TiO 2 and ZnO. If the base resin layer 20 contains the above-mentioned inorganic pigment, the base resin layer 20 becomes compact. As a result, the hardness of the base resin layer 20 is improved. The inorganic pigment preferably has a small particle size. The preferred particle size of the inorganic pigment is 270 nm or less. In this case, the organic resin is more uniformly compacted. In the base resin layer 20 , the desired hardness HL can be obtained by adjusting the structure of the organic resin, the molecular weight of the monomer, oligomer or polymer, the composition ratio of different types of organic resins, the amount of inorganic pigments added, and the type or amount of additives described below. The preferred content of the organic resin in the base resin layer 20 is 80% by mass or more, more preferably 90% by mass or more, and even more preferably 97% by mass or more. [4.11. Preferred Chemical Composition of the Outermost Resin Layer 30] The outermost resin layer 30 has a buffering function to absorb the external force associated with the collision of flying objects. The outermost resin layer 30 preferably has the following chemical composition. The outermost resin layer 30 preferably contains an organic resin. For example, the organic resin is composed of one or more selected from the group consisting of well-known natural resins and well-known synthetic resins. For example, the organic resin is composed of one or more selected from the group consisting of epoxy resins, urethane resins, polyester resins, phenolic resins, polyether sulfone resins, melamine alkyd resins, acrylic resins, polyamide resins, polyimide resins, polysilicone resins, polyvinyl acetate resins, polyolefin resins, polystyrene resins, vinyl chloride resins, and vinyl acetate resins. The organic resin is preferably composed of one or more types selected from the group consisting of polyester resins, urethane resins, and melamine resins. Polyester resins are, for example, polyesters, urethane resins are, for example, urethanes, and melamine resins are, for example, melamines. As described above, the metal material 1 is usually used in indoor or outdoor environments after being subjected to cold working such as bending. Therefore, similar to the base resin layer 20, the outermost resin layer 30 is also required to have properties such as ductility, elongation, hardness, chemical resistance, and water resistance. Polyester resins and urethane resins are excellent in the above-mentioned properties. In addition, melamine resins are excellent in chemical resistance and hardness. Melamine resins react with the functional groups of polyester resins and urethane resins to further increase the degree of crosslinking. Therefore, the organic resin of the outermost resin layer 30 is preferably composed of at least one of a polyester resin and a urethane resin, and a melamine resin. Examples of polyester resins include polyesters, and examples of urethane resins include urethanes. In the outermost resin layer 30 , the desired hardness HH can be obtained by adjusting the structure of the organic resin, the molecular weight of the monomer, oligomer, or polymer, the composition ratio of different types of organic resins, and the type or amount of additives described below. When the outermost resin layer 30 contains an organic resin and an additive, the organic resin content in the outermost resin layer 30 is preferably 90% by mass or greater, more preferably 95% by mass or greater, and even more preferably 97% by mass or greater. The additive content in the outermost resin layer 30 is preferably 10% by mass or less, more preferably 5% by mass or less, and even more preferably 3% by mass or less. The additive content may be 0% or greater. [4.12. Additives Optional in the Base Resin Layer 20 and the Top Resin Layer 30] Each of the base resin layer 20 and the top resin layer 30 may further contain one or more additives selected from the group consisting of coloring pigments, organic resin particles, leveling agents, defoaming agents, aggregates, and rheology modifiers. The following describes coloring pigments, organic resin particles, leveling agents, defoaming agents, aggregates, and rheology modifiers. (1) About Coloring Pigments Coloring pigments are fine particles (powder) that are insoluble in water and oil. By being contained in the base resin layer 20 or the outermost resin layer 30, the coloring pigments color the base resin layer 20 or the outermost resin layer 30. The coloring pigments can be well-known ones, such as inorganic pigments or organic pigments. Coloring pigments are pigments with colored colors. The so-called colored colors refer to colors with the properties of hue, brightness, and saturation. The base resin layer 20 preferably contains a coloring pigment, while the outermost resin layer 30 does not. As described above, the outermost resin layer 30 provides a cushioning effect, while the base resin layer 20 provides a protective effect. Therefore, the outermost resin layer 30 is easily deformed by external forces such as flying objects, while the base resin layer 20 is less susceptible to deformation even under external forces. If the outermost resin layer 30 does not contain a coloring pigment and the base resin layer 20 contains a coloring pigment, the creative nature associated with the coloring pigment is easily maintained. When the coloring pigment is an inorganic pigment, the coloring pigment is, for example, one or more selected from the group consisting of neutralized precipitated pigments (sulfates, carbonates, etc.) and fired pigments (metal sulfides, metal oxides, multi-metal composite oxides, etc.). When the coloring pigment is an organic pigment, the coloring pigment is, for example, one or more selected from the group consisting of chlorine pigments, azo pigments (soluble azo lake pigments, insoluble azo pigments, etc.), acid condensation pigments, polycyclic pigments (phthalocyanine pigments, indigo pigments, quinacridone pigments, anthraquinone pigments, etc.), and metal complex pigments (azo chelate pigments, transition metal complex pigments, etc.). The color of the coloring pigment is not particularly limited. Examples of the coloring pigment include carbon black (C), iron black (Fe 3O 4) Black pigment. However, the coloring pigment is not limited to black pigment, and may also be other coloring pigments (white, purple, yellow, cyan, red, orange, green, blue, indigo, purple, etc.). The particle size of the coloring pigment is not particularly limited. However, coloring pigments develop color by absorbing visible light. Therefore, considering the wavelength of visible light, the preferred lower limit of the coloring pigment particle size is greater than 180 nm. The upper limit of the coloring pigment particle size is not particularly limited. The preferred upper limit of the coloring pigment particle size is 1000 nm, more preferably 800 nm, and even more preferably 700 nm. (2) Organic Resin Particles Organic resin particles are also called wax. The organic resin particles are, for example, one or more selected from the group consisting of urethane resin particles, acrylic resin particles, hard polyethylene resin particles, polyethylene resin particles, polypropylene resin particles, and PTFE (polytetrafluoroethylene) particles. The organic resin particles preferably satisfy at least any one of the following (Construction 1) and (Construction 2). (Construction 1) The hardness of the organic resin particles is higher than that of the base resin. (Construction 2) Since the surface free energy of the organic resin particles is lower than that of the base resin, the friction coefficient of the resin particles is lower than that of the base resin. The base resin herein refers to the organic resin described in [4.10. Regarding the preferred chemical composition of the base resin layer 20] and [4.11. Regarding the preferred chemical composition of the top resin layer 30] constituting the matrix (adhesive) of the base resin layer 20 or the top resin layer 30. A portion of the organic resin particles may protrude outward from the base resin. The organic resin particles are harder or have a lower friction coefficient than the base resin. Therefore, the generation of scratches caused by collision or contact with flying objects can be further suppressed. (3) Leveling Agent: A leveling agent adjusts the surface tension of the outermost resin agent, which is the raw material of the outermost resin layer 30, and smoothes the surface of the outermost resin agent after application. This prevents unevenness or irregularities from forming on the surface of the outermost resin layer 30. Examples of leveling agents include fluorine-based surfactants, silicone-based surfactants, and acrylic resins. (4) Defoaming Agents Defoaming agents are used to suppress bubbles generated in the bottom resin agent and the top resin agent as slurry. Examples of defoaming agents include silicone defoamers, non-silicone defoamers, mineral oil defoamers, glycerol esters, etc. (5) About Aggregates Aggregates are fine inorganic particles (powders) that are insoluble in water and oil. By being contained in the base resin layer 20 or the outermost resin layer 30, the aggregates make the coating fluffy or inhibit the deformation of the resin (base resin layer 20 or the outermost resin layer 30). Aggregates are, for example, one or more selected from the group consisting of silica and talc. However, when the secondary particle size of the aggregate is larger than the wavelength of visible light (270 nm), visible light scattering will occur. In this case, sufficient creativity may not be obtained in the metal material 1. Therefore, the preferred secondary particle size of the aggregate is less than 270 nm. (6) About Rheology Adjusters Rheology adjusters are also called thickeners. Rheology adjusters adjust the viscosity of the base resin agent, which is the raw material of the base resin layer 20, and the viscosity of the outermost resin agent, which is the raw material of the outermost resin layer 30. This makes it easier to adjust the application amount of the base resin agent and the outermost resin agent when applying them. Examples of rheology adjusters include aggregate-type viscoelasticity adjusters and polymer-type viscoelasticity adjusters with acrylic acid as the main component. <5. Optional Configuration of Metal Material 1> Furthermore, as shown in FIG4 , the metal material 1 may include an anodic oxide film 40 between the metal surface S (surface 10S of the metal substrate 10 or surface 11S of the plating layer 11) and the underlying resin layer 20. In other words, the anodic oxide film 40 may have any configuration and may not be included. The following describes the anodic oxide film 40. [5.1. Anodized Film 40] The anodized film 40 further enhances the corrosion resistance of the metal material 1 and improves the adhesion between the metal surface S and the underlying resin layer 20. The composition of the anodized film 40 can be a well-known composition. The anodized film 40 preferably contains an organosilicon compound, one or more specific inorganic compounds containing V, P, Zr, and Ti, and a fluorine compound. (1) About Organosilicon Compounds Organosilicon compounds are compounds in which silicon (Si) is bonded to an organic group. The type of organosilicon compound is not particularly limited. The organosilicon compound is preferably a silane coupling agent. Silane coupling agents have reactive functional groups and hydrolyzable groups. The reactive functional groups of the silane coupling agent bond with the organic material (organic resin), while the hydrolyzable groups bond with the inorganic material. Therefore, the silane coupling agent improves adhesion to the metal surface S and also improves adhesion to the underlying resin layer 20. (2) Specific Inorganic Compound The specific inorganic compound is a compound containing one or more elements selected from the group consisting of V, P, Zr, and Ti. The specific inorganic compound improves the corrosion resistance of the metal material 1 . (2-1) Regarding V Compounds Vanadium compounds improve corrosion resistance. The vanadium compound is not particularly limited as long as it contains V. The vanadium compound is, for example, selected from vanadium pentoxide V 2O 5. Metavanadic acid HVO 3. Ammonium metavanadate, sodium metavanadate, oxyvanadium trichloride VOCl 3. Vanadium trioxide V 2O 3. Vanadium dioxide (VO) 2. Vanadium oxysulfate VOSO 4. Vanadium oxyacetate VO(OC(=CH 2) CH 2COCH 3) 2. Vanadium acetyl acetate V(OC(=CH 2) CH 2COCH 3) 3, and vanadium trichloride VCl 3. Furthermore, the vanadium compound may be one produced by reducing a pentavalent vanadium compound to a tetravalent or divalent vanadium compound using an organic compound having at least one functional group selected from the group consisting of a hydroxyl group, a carbonyl group, a carboxyl group, a mono- to tertiary amine group, an amide group, a phosphate group, and a phosphonic acid group. (2-2) Regarding the P Compound: The P compound significantly improves corrosion resistance. For example, the P compound is one or more selected from the group consisting of phosphoric acid, ammonium phosphate, potassium phosphate, and sodium phosphate. The P compound is preferably phosphoric acid. When phosphoric acid is used, corrosion resistance is further improved. (2-3) Zr Compounds Zr compounds are compounds containing Zr, including Zr oxides, hydroxides, complex compounds, and salts with inorganic or organic acids. Zr compounds readily react with reactive functional groups. Therefore, Zr compounds promote the hardening and crosslinking reactions of the anodic oxide film 40, thereby improving the tightness of the anodic oxide film 40. This results in significantly improved corrosion resistance. The Zr compound is, for example, selected from the group consisting of zirconyl nitrate (ZrO(NO 3) 2) Zirconyl acetate, zirconyl sulfate, ammonium zirconium carbonate {(NH 4) 2[Zr(CO 3) 2(OH) 2]}, and one or more members of the group consisting of zirconium acetate, etc. (2-4) Ti Compounds: Like Zr compounds, Ti compounds readily react with reactive functional groups. Therefore, Ti compounds harden the anodic oxide film 40 and improve the tightness of the anodic oxide film 40. Consequently, the corrosion resistance of the metal material 1 is significantly improved. Ti compounds are compounds containing Ti, including Ti oxides, hydroxides, complex compounds, and salts with inorganic or organic acids. For example, Ti compounds are selected from titanium oxysulfate (TiOSO 4) Titanium lactate, diisopropoxytitanium bisacetylacetone {(C 5H 7O 2) 2Ti[OCH(CH 3) 2] 2}, and one or more members selected from the group consisting of reactants of lactic acid and titanium alkoxide. (3) Fluorine compounds improve the corrosion resistance of the anodic oxide film 40. The fluorine compound is not particularly limited as long as it contains fluorine. Examples of the fluorine compound include one or more selected from the group consisting of hydrofluoric acid, fluoroboric acid, fluorosilicic acid, their fluorides, and complex fluoride salts. The Zr compound and the fluorine compound may also be integrated. Specifically, the anodic oxide coating 40 may contain a Zr compound and a fluorine compound in different individual compounds, or may contain a compound containing Zr and fluorine. For example, zirconium hydrofluoride can act as a Zr compound, and may also act as a fluorine compound. Therefore, the zirconium hydrofluoride system contains a Zr compound and a fluorine compound. In addition, the Ti compound and the fluorine compound may also be integrated. Specifically, the anodic oxide coating 40 may contain a Ti compound and a fluorine compound in different individual compounds, or may contain a compound containing Ti and fluorine. For example, titanium hydrofluoride can act as a Ti compound, and may also act as a fluorine compound. Therefore, the titanium hydrofluoride system contains a Ti compound and a fluorine compound. <6. Effects of Metal Material 1> The metal material 1 having the above-described structure has excellent corrosion resistance and excellent scratch resistance. Therefore, the metal material 1 can be widely used in applications such as indoor motors and equipment, outdoor automobiles, and construction materials. <7. Manufacturing method of metal material 1> The metal material 1 of this embodiment can be manufactured, for example, by the following method. The following is an example of a manufacturing method of the metal material 1. An example of a manufacturing method of the metal material 1 includes the following steps. (Step 1) Metal material preparation step (Step 2) Plating layer formation step (Step 3) Texture formation step (Step 4) Anodized film formation step (Step 5) Bottom layer resin layer formation step (Step 6) Top layer resin layer formation step Here, steps 2 to 4 are optional steps. That is, each step from step 2 to step 4 only needs to be implemented as needed. The following describes each step. [(Step 1) Metal Material Preparation Step] In the metal material preparation step, the metal substrate 10 is prepared. As described above, the metal substrate 10 is, for example, a metal plate, a metal bar, or a metal pipe. [(Step 2) Plating Layer Forming Step] The plating layer forming step is an optional step. The plating layer forming step is performed when the plating layer 11 is formed on the metal substrate 10. Therefore, when the plating layer 11 is not formed on the metal substrate 10, the plating layer forming step is not performed. In the plating layer forming step, the plating layer 11 is formed on the metal substrate 10 by electroplating or hot-dip plating. The electroplating and hot-dip plating methods may be any well-known plating methods. When the plating layer 11 is a zinc-based plating layer, the plating layer 11 is formed by, for example, the following zinc electroplating method or hot-dip zinc plating method. (Zinc electroplating method) When a zinc-based coating is formed by zinc electroplating, the zinc electroplating method only needs to be implemented by a well-known method. In this specification, the zinc electroplating method also includes the zinc alloy electroplating method. The electroplating solution used in the zinc electroplating method only needs to use the well-known zinc electroplating solution. The zinc electroplating solution is, for example, a sulfuric acid bath, a chloride bath, a zincate bath, a cyanide bath, a pyrophosphate bath, a boric acid bath, a citric acid bath, other complex baths, and combinations thereof. The zinc alloy electroplating solution, for example, contains, in addition to Zn ions, one or more single ions or complex ions selected from the group consisting of Fe, Ni, Co, Cr, and C. In addition, in order to obtain desired effects such as a leveling effect or an increase in hardness, organic additives may also be added to the zinc electroplating solution or the zinc alloy electroplating solution. (Molten zinc plating method) When forming the coating layer 11 composed of a zinc-based coating layer by the molten zinc plating method, the molten zinc plating method can be carried out by a well-known method. The plating bath used in the molten zinc plating method can be a well-known plating bath. The plating bath contains, for example, Al, and the remainder is composed of Zn and impurities. The impurities are, for example, Fe. In addition to Zn, Al, and Fe, the plating bath may also contain one or more elements selected from the group consisting of Co, Cr, Cu, Ni, P, Si, Sn, Mg, Mn, Mo, V, W, Zr, Ca, Y, La, Ce, Bi, In, Ti, V, Nb, Cu, Mn, Sr, Sb, Pb, and B. Through the above manufacturing process, the plating layer 11 is formed on the metal substrate 10 . [(Step 3) Texture Forming Step] The texture forming step is an optional step. It is performed when a texture TX is formed on the metal surface S (the surface 10S of the metal substrate 10 or the surface 11S of the plating layer 11). In the texture forming step, the metal surface S is textured to form the texture TX. When the texture TX is a hairline texture, a well-known hairline finishing method is applied. Examples of hairline finishing methods include methods of forming hairlines by grinding the surface with a well-known abrasive belt, methods of forming hairlines by grinding the surface with a well-known abrasive brush, and methods of forming hairlines by rolling transfer using a roller that has been given a hairline shape. The length, depth, and number of hairlines can be adjusted by adjusting the grain size of the well-known abrasive belt, the grain size of the well-known abrasive brush, or the surface shape of the roller. From the perspective of surface quality, hairline finishing methods using abrasive belts or abrasive brushes to form hairlines are preferred. When the texture TX is a concave-convex shape such as embossing, dotting, or random patterns, a well-known transfer method using a roller can also be implemented. Specifically, a roller is prepared with a concave-convex texture TX such as an embossed pattern. The prepared roller is pressed against a metal surface S to transfer the concave-convex shape formed on the roller to the metal surface S. Through this process, a concave-convex shape such as an embossed pattern can be formed on the metal surface S. (Step 4) Anodized Film Formation Step: The anodized film formation step is an optional step. That is, it is not necessary to perform the anodized film formation step. In the anodized film formation step, an anodized film 40 is formed on the metal surface S. The manufacturing line used in the anodized film formation step includes a conveyor line, and a coating coating device and a firing furnace, arranged in order from upstream to downstream of the conveyor line. A metal substrate 10 having a metal surface S is conveyed along the conveyor line. A coating device is disposed on the conveyor line. The coating device applies an anodic oxidation coating agent, which serves as a raw material for the anodic oxidation coating 40, to the metal surface S. The coating device can be, for example, a well-known coating machine. Examples of well-known coating machines include die coaters, roll coaters, and curtain coaters. The anodic oxidation coating agent contains: an organic silicon compound, a specific inorganic compound containing one or more of V, P, Zr and Ti, and a fluorine compound. The firing furnace is located on the conveyor line, downstream of the coating device. The firing furnace dries and fires the anodic oxide coating agent applied to the metal surface S by the coating device, forming the anodic oxide film 40. The peak metal temperature (PMT) in the firing furnace is set to, for example, 50 to 250°C. [(Step 5) Primer Resin Layer Formation Step] In the primer resin layer formation step, a primer resin layer 20 is formed on the metal surface S or the surface of the anodized film 40. The manufacturing line used in the primer resin layer formation step includes a conveyor line, and a coating coating device and a firing furnace in order from upstream to downstream of the conveyor line. The conveyor line conveys a metal substrate 10 including a metal surface S or an anodized film 40. A coating device is located on the conveyor line. The coating device applies a primer resin agent, which serves as the raw material for the primer resin layer 20, to the metal surface S or the surface of the anodized film 40. The coating device is, for example, a well-known coating machine. The primer resin agent serves as the raw material for the primer resin layer 20. The primer resin agent contains an organic resin and an inorganic pigment. The firing furnace is located on the conveyor line, downstream of the coating coating device. The firing furnace dries and fires the primer resin applied to the metal surface S or the surface of the anodized film 40 by the coating coating device, forming the primer resin layer 20. The maximum temperature (PMT) in the firing furnace is set to, for example, 150 to 250°C. [(Step 6) Outermost Resin Layer Formation Step] In the outermost resin layer formation step, an outermost resin layer 30 is formed on the surface of the base resin layer 20. The manufacturing line used in the outermost resin layer formation step includes a conveyor line, and a coating coating device and a firing furnace, arranged in order from upstream to downstream of the conveyor line. The conveyor line conveys the metal substrate 10 including the base resin layer 20. A coating application device is located on the conveyor line. The coating application device applies a top layer resin agent, which serves as the raw material for the top layer resin layer 30, to the surface of the base resin layer 20. The coating application device is, for example, a well-known coating machine. The top layer resin agent serves as the raw material for the top layer resin layer 30. The top layer resin agent contains an organic resin. The firing furnace is located on the conveyor line, downstream of the coating coating device. It dries and fires the topmost resin layer applied to the surface of the base resin layer 20 by the coating coating device, forming the topmost resin layer 30. The maximum temperature (PMT) in the firing furnace is set to, for example, 150 to 250°C. In steps 5 and 6, the hardness HL of the base resin layer 20 and the hardness HH of the outermost resin layer 30 are adjusted so that the metal material 1 meets equation (1). In addition, in steps 5 and 6, the thickness TL of the base resin layer 20 and the thickness TH of the outermost resin layer 30 are adjusted so that the metal material 1 meets equation (2). Furthermore, in steps 5 and 6, the thickness TL of the base resin layer 20 and the thickness TH of the outermost resin layer 30 are preferably adjusted so that the metal material 1 meets equations (3) and (4). The metal material 1 of this embodiment is manufactured by the above-mentioned manufacturing process. The metal material 1 can also be manufactured by other manufacturing methods. The above-mentioned manufacturing method is an example of a manufacturing method of the metal material 1. [Example] The following examples are used to more specifically illustrate the effects of the metal material 1 of this embodiment. [Regarding the Production of Metal Materials] The metal materials having the test numbers shown in Table 1 were produced by the following production process. The metal materials were all formed into metal plates. [Table 1] [Metal Material Preparation Process] First, prepare a metal plate (metal material) of the metal type listed in the "Metal Base Material" column of Table 1. "Steel Material" in the "Metal Material" column of Table 1 indicates that the metal plate is a steel plate (equivalent to JIS standard SPHC). "Al Alloy" indicates that the metal plate is an aluminum alloy plate (equivalent to JIS standard A1014P). "Al" indicates that the metal plate is an aluminum plate (equivalent to JIS standard A1050P). [Plating Layer Forming Step] In Test Nos. 6 to 50 and 52 to 56, a plating layer was formed on a metal plate. In test numbers 6 to 9, 52, and 53, a Zn plating layer (denoted as "Zn plating" in the "Plating layer" column in Table 1) was formed as a plating layer by a well-known electroplating method. The coating weight of the plating layer was 35 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11]. The results showed that the plating layers of these test numbers all had a chemical composition consisting of Zn. In test numbers 10 to 38, 49, 50, and 54 to 56, a Zn-Ni plating layer was formed as a plating layer by a well-known electroplating method (indicated as "Zn-Ni plating" in the "Plating Layer" column in Table 1). The coating weight of the plating layer was 35 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11] above. The results showed that the plating layers of these test numbers all had a chemical composition in which the Ni content was 10 to 15% by mass, with the remainder consisting of Zn. In test number 39, a Zn-Fe plating layer was formed as a plating layer by a well-known electroplating method (indicated as "Zn-Fe plating" in the "plating layer" column in Table 1). The coating weight of the plating layer was 35 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11]. The results showed that the plating layer of test number 39 had a chemical composition in which the Fe content was 15% by mass, with the remainder consisting of Zn. In test number 40, a Zn-Co plating layer was formed as a plating layer by a well-known electroplating method (indicated as "Zn-Co plating" in the "Plating layer" column in Table 1). The coating weight of the plating layer was 35 g / m 2The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11] above. The results showed that the plating layer of test number 40 had a Co content of 2.0% by mass, with the remainder consisting of Zn. In test number 41, a Zn-Al plating layer was formed as a plating layer by a well-known hot-dip plating method (indicated as "Zn-Al plating" in the "Plating layer" column in Table 1). The coating weight of the plating layer was 90 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11]. The results showed that the plating layer of test number 41 had a chemical composition in which the Al content was 5.0% by mass, with the remainder consisting of Zn. In test number 42, a Zn-Al coating layer was formed by a well-known hot-dip coating method, and then the Zn-Al coating layer was alloyed by a well-known heat alloying method to form a Zn-Fe-Al coating layer (indicated as "Zn-Fe-Al coating" in the "Coating layer" column in Table 1). The coating weight was 45 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11] above. The results showed that the plating layer of test number 42 had a chemical composition consisting of 13.0% Fe by mass, 0.1% Al by mass, and the remainder consisting of Zn. In test number 43, an Al-Si coating layer was formed as a coating layer by a well-known hot-dip coating method (indicated as "Al-Si coating" in the "coating layer" column in Table 1). The coating weight was 60 g / m 2 The chemical composition of the plating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Plating Layer 11] above. The results showed that the plating layer of test number 43 had a chemical composition in which the Si content was 9% by mass, with the remainder consisting of Al. In test numbers 44 to 48, a Zn-Al-Mg coating layer was formed as a coating layer by a well-known hot-dip coating method (indicated as "Zn-Al-Mg coating" in the "Coating layer" column of Table 1). The coating weight was 90 g / m 2The chemical composition of the coating layer was measured using the method described in [3.1. Method for Measuring the Chemical Composition of the Coating Layer 11] above. The results showed that the coating layers of these test numbers all had a chemical composition consisting of an Al content of 11.0 to 19.0% by mass, a Mg content of 3.0 to 6.0% by mass, and the remainder consisting of Zn. [Texture Forming Process] Texture was formed on the surface of the metal substrate in Test Nos. 3 and 5, and on the surface of the plated layer in Test Nos. 8, 9, 11 to 45, 49, 50, and 52 to 56. "Hairline" in the "Texture" column in Table 1 refers to the formation of a hairline texture. "Embossed" refers to the formation of an embossed texture. Hairline texture was formed using an abrasive brush. Embossing was formed on the plated layer using a roller. [Anodic oxide film forming process] For test numbers 2, 3, 7 to 45, 49, 50 and 52 to 56, an anodic oxide film is formed on a metal substrate or a plated layer. The anodic oxide film agent in any test number is prepared in the following manner. A silane coupling agent (A): 3-aminopropyltrimethoxysilane and a silane coupling agent (B): 3-glycidoxypropyltrimethoxysilane are prepared, and are added to water adjusted to pH 4 at a solid mass ratio [(A) / (B)] = 1.0, and stirred for a predetermined time to produce an organic silicon compound. Then, a mixture containing the produced organic silicon compound, phosphoric acid as a phosphoric acid compound, and vanadium oxysulfate (VOSO 4) and an anodic oxidation coating agent of zirconium hydrofluoride as a Zr compound and a fluorine compound. The produced anodic oxidation coating agent is used to form an anodic oxidation film on a metal substrate or a plating layer. [Primer Resin Layer Formation Step] A primer resin layer was formed on the metal substrate, plated layer, or anodic oxide film of each test number using a resin agent having the agent type code listed in the "Primer Resin Layer" column of Table 1. The composition of the resin agent is shown in Table 2. [Table 2] The structure, molecular weight, ratio and additive amount of each type of organic resin in Table 2 are appropriately adjusted so that the hardness HL of the base resin layer becomes the value recorded in the "HL (GPa)" column of the "base resin layer" column of Table 1. The content of 4 is set to 20% when the solid content of the corresponding agent is 100% by mass, the content of beads is set to 2% when the solid content of the corresponding agent is 100% by mass, and the content of carbon black is set to 1% by mass when the solid content of the corresponding agent is 100% by mass. After applying the resin agent to the metal layer or the anodized film using a coater, it is dried in a firing furnace. The maximum temperature (PMT) of the firing furnace is in the range of 150 to 250°C. The above steps form the base resin layer. [Topmost Resin Layer Formation Process] After forming the base resin layer, a topmost resin layer is formed on the surface of the base resin layer using a resin agent having the agent type symbol listed in the "Topmost Resin Layer" column of Table 1. The structure, molecular weight, ratio, and additive amount of the organic resin of each agent type listed in Table 2 are appropriately adjusted so that the hardness HH of the topmost resin layer reaches the value listed in the "HH (GPa)" column of the "Topmost Resin Layer" column of Table 1. After applying the resin agent to the base resin layer using a coater, the resin is dried in a firing furnace. The furnace's maximum temperature (PMT) is in the range of 150 to 250°C. The above process forms the outermost resin layer. The metal plates (metal materials) of each test number were manufactured using the above manufacturing process. [Evaluation Tests] The following evaluation tests were performed on the metal plates of each test number. (Test 1) Hardness and Thickness Measurement Test of the Base Resin Layer and the Outermost Resin Layer (Test 2) Scratch Resistance Evaluation Test (Test 3) Corrosion Resistance Evaluation Test (Test 4) Visual Evaluation Test (Test 5) Creativity Evaluation Test The following describes Tests 1 to 5. [(Test 1) Hardness and Thickness Measurement of the Underlayer and Outermost Resin Layers] Based on the method described in [4.9. Method for Measuring the Hardness HL and Thickness TL of the Underlayer Resin Layer 20, and the Hardness HH and Thickness TH of the Outermost Resin Layer 30], the hardness HL (GPa) of the underlayer resin layer, the thickness TL (μm) of the underlayer resin layer, the hardness HH (GPa) of the outermost resin layer, and the thickness TH (μm) of the outermost resin layer were determined for each test number. A nanoindenter, Hysitron TI 980 manufactured by Bruker, was used. The obtained values ​​are shown in the "HL (GPa)" column, the "TL (μm)" column, the "HH (GPa)" column, and the "TH (μm)" column in Table 1. [(Test 2) Damage Resistance Evaluation Test] The damage resistance of the metal plates of each test number was evaluated using the following method. A test piece (50 mm x 100 mm x plate thickness) was collected from each metal plate. It was then mounted and secured on the specimen carrier of a friction tester equipped with a diamond needle with a tip diameter of 0.09 mm. The friction tester used was a Tribo Gear TYPE 14FW manufactured by Shinto Scientific Co., Ltd. Make the diamond needle contact the surface of the outermost resin layer of the test piece vertically. While the diamond needle is in contact with the surface of the outermost resin layer of the test piece, slide the sample carrier on which the test piece is fixed at a scraping speed of 60 mm / second. At this time, change the load applied to the diamond needle, and visually observe whether there are any scratches. The damage resistance of the metal plate is evaluated in the following manner based on the load at which the scratches are observed. The obtained results are shown in the "Damage Resistance" column in Table 1. Scar score 1: The occurrence of scratches is observed when the load is less than 30 gf Scar score 2: The occurrence of scratches is observed when the load is greater than 30 gf and less than 70 gf Scar score 3: The occurrence of scratches is observed when the load is greater than 70 gf and less than 120 gf Scar score 4: The occurrence of scratches is observed when the load is greater than 120 gf If the scratch score is 2 or more, it is evaluated as having excellent damage resistance. The evaluation results are shown in the "scratch resistance" column in Table 1. [(Test 3) Corrosion resistance evaluation test] The corrosion resistance of the metal plates of each test number was evaluated for corrosion resistance (long-term corrosion resistance) by the following method. A test piece of 75 mm × 100 mm × plate thickness was collected from the metal plates of each test number. The end faces and the inside of the test piece were protected with sealing tape. Then, a salt spray test of 5% NaCl maintained at 35°C was carried out in accordance with JIS Z 2371 (2015). The test was carried out for 240 hours, and the rust generation rate (%) after the test was calculated. Based on the obtained rust generation rate, the evaluation was performed in the following manner. A: The rust generation rate is less than 1%. B: The rust generation rate is 1% or more and less than 5%. C: The rust generation rate is 5% or more. In the case of evaluation A or B, it is evaluated that excellent corrosion resistance is obtained. In the case of evaluation C, it is evaluated that sufficient corrosion resistance is not obtained. The evaluation results are shown in the "Corrosion Resistance" column in Table 1. [(Test 4) Viewability evaluation test] The visibility of the metal material forming the textured metal material is evaluated by the following method. In an environment equivalent to sunlight at noon on a sunny day (illuminance of about 65,000 lux), the metal material of each test number is arranged. Then, it is confirmed whether the metal material on the surface of the metal substrate or the surface of the plating layer can be seen from the surface of the metal material through the outermost resin layer and the bottom resin layer. The following evaluation is performed based on the number of people who are judged to be able to see the metal material. A: All 10 people are judged to be able to see. B: More than 7 people but less than 10 people are judged to be able to see. C: Less than 7 people are judged to be able to see. When evaluating the situation A or B, it is evaluated that sufficient visibility is obtained. When evaluating the situation C, it is evaluated that insufficient visibility is obtained. The evaluation results are shown in the "Viewability" column in Table 1. [(Test 5) Originality Evaluation Test] The originality of the texture of a textured metal material was evaluated using the following method. First, a textured metal material with a test number was placed outdoors at a 60° angle relative to the horizontal. The metal material was positioned with the texture facing upward. Next, an observer, positioned 1 meter from the ground, visually observed the metal material, facing the metal material. The observer's gaze was positioned at the same height as the metal material. A total of 10 observers performed visual observations and conducted a sensory evaluation to determine whether the originality was excellent. The following evaluation was performed based on the number of observers who judged the originality to be excellent: A: 9 or more people judged the originality to be excellent. B1: 7 to 8 people judged the originality to be excellent. B2: 5 to 6 people judged the originality to be excellent. C: Fewer than 5 people judged the originality to be excellent. Excellent originality was achieved in the case of evaluation A, B1, or B2. In the case of evaluation C, it was determined that insufficient originality was obtained. The evaluation results are shown in the "Originality" column in Table 1. [Evaluation Results] Referring to Table 1, in the metal materials of test numbers 1 to 45, the hardness HL of the base resin layer was 0.18 GPa or greater. Furthermore, the hardness HH of the outermost resin layer satisfied equation (1). Furthermore, the thickness TL of the base resin layer and the thickness TH of the outermost resin layer satisfied equation (2). As a result, in these test numbers, the scratch score in the damage resistance evaluation test was 2 or greater, indicating excellent damage resistance. Furthermore, the corrosion resistance evaluation test gave an evaluation score of B or greater, indicating excellent corrosion resistance. Among the metal materials with test numbers 1 to 45, excluding test numbers 20, 23, 29, and 38, the thickness TL of the base resin layer was 0.5 μm or greater, the hardness HH of the outermost resin layer was 0.13 GPa or greater, the thickness TH of the outermost resin layer was 2.0 μm or greater, and the TH / TL ratio was 1.3 or greater. Therefore, the scratch score in the scratch resistance evaluation test was 3 or greater, indicating excellent scratch resistance. Among the textured test numbers 3, 5, 8, 9, 11 to 45, TL+TH was 20.0 or less in the test numbers other than test numbers 19 and 35. Therefore, the originality was more excellent in these test numbers. On the other hand, in test numbers 46 and 49, a resin layer corresponding to the base resin layer was not formed. Therefore, the scratch score in the scratch resistance evaluation test was 1, and sufficient scratch resistance could not be obtained. In test numbers 47 and 50, a resin layer corresponding to the outermost resin layer was not formed. Therefore, the scratch score in the scratch resistance evaluation test was 1, indicating that sufficient scratch resistance could not be obtained. In test numbers 48 and 56, the thickness TL of the base resin layer and the thickness TH of the outermost resin layer did not satisfy the formula (2). Therefore, the corrosion resistance evaluation test was evaluated as C, and sufficient corrosion resistance could not be obtained. In test numbers 51, 53, and 55, the hardness HH of the outermost resin layer did not satisfy the formula (1). Therefore, the scratch score in the scratch resistance evaluation test was 1, and sufficient scratch resistance could not be obtained. In test numbers 52 and 54, the hardness HL of the base resin layer was less than 0.18 GPa. Therefore, the scratch score in the scratch resistance evaluation test was 1, and sufficient scratch resistance could not be obtained. The above describes the implementation of the present disclosure. However, the above implementation is merely illustrative of how the present disclosure may be implemented. Therefore, the present disclosure is not limited to the above implementation and may be implemented with appropriate modifications without departing from the scope of the present disclosure. 1: Metal material 10: Metal substrate 11: Plating layer 11S: Surface of plating layer 20: Base resin layer 30: Top resin layer FIG1 is a cross-sectional view of a metal material according to this embodiment, taken perpendicularly to the rolling direction. FIG2 is a cross-sectional view of a metal material according to another embodiment, taken perpendicularly to the rolling direction. FIG3 is a top view of the surface of the metal substrate or the surface of the coating layer of FIG1 or FIG2. FIG4 is a cross-sectional view of another metal material according to this embodiment, taken perpendicularly to the rolling direction, which is different from FIG1. 1: Metal materials 10: Metal substrate 11: Plating layer 11S: Surface of the coating 20: bottom resin layer 30: The outermost resin layer

Claims

1. A metallic material comprising: a metallic substrate, a bottom resin layer formed on the metallic substrate, and a top resin layer formed on the bottom resin layer as the top layer, wherein the hardness HL of the bottom resin layer is 0.18 GPa or more, the hardness HH of the top resin layer satisfies formula (1), and the thickness TL (μm) of the bottom resin layer and the thickness TH (μm) of the top resin layer satisfy formula (2).

2. The metallic material as described in claim 1, wherein the hardness HH of the aforementioned outermost resin layer is 0.13 GPa or higher.

3. The metallic material as described in claim 1, wherein the thickness TL of the aforementioned underlying resin layer is 0.5 μm or more.

4. The metallic material as described in claim 1, wherein the thickness TH of the aforementioned outermost resin layer is 2.0 μm or more.

5. The metallic material as claimed in claim 1, wherein the aforementioned thickness TL and the aforementioned thickness TH satisfy equation (3).

6. The metallic material as claimed in claim 1, wherein the aforementioned thickness TL and the aforementioned thickness TH satisfy equation (4).

7. The metal material as claimed in claim 1, wherein the metal material further comprises a plating layer formed on the aforementioned metal substrate, and the aforementioned underlying resin layer is formed on the aforementioned plating layer.

8. The metallic material as claimed in claim 7, wherein the aforementioned metallic substrate is steel, and the aforementioned coating layer is composed of one or more selected from the group consisting of Zn coating, Zn-Ni alloy coating, Zn-Fe coating, Zn-Co coating, Zn-Al coating, Zn-Fe-Al coating, Al-Si coating, and Zn-Al-Mg coating.

9. The metallic material as claimed in claim 1, wherein the aforementioned underlying resin layer comprises: an organic resin composed of one or more selected from the group consisting of polyester, carbamate and melamine, and an inorganic pigment composed of one or more selected from the group consisting of BaSO4, SiO2, ZrO, TiO2 and ZnO.

10. The metallic material as claimed in claim 1, wherein the aforementioned outermost resin layer comprises an organic resin composed of one or more species selected from the group consisting of polyester and melamine.

11. The metallic material as claimed in claim 1, wherein a texture is formed on the surface of the aforementioned metallic material.

12. The metallic material as claimed in claim 7, wherein a texture is formed on the surface of the aforementioned coating layer.

13. The metallic material as described in claim 11 or claim 12, wherein the aforementioned texture is a hairline texture.

14. The metal material as claimed in claim 1, wherein the metal material further comprises an anodized coating formed on the aforementioned metal substrate, and the aforementioned underlying resin layer is formed on the aforementioned anodized coating.

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