Vapor phase corrosion inhibitor for steel, vapor phase corrosion inhibition packaging material and preparation method of vapor phase corrosion inhibitor

Abstract

The invention discloses a gas-phase corrosion inhibitor for steel, a gas-phase corrosion inhibition packaging material for steel and a preparation method of the gas-phase corrosion inhibitor and the gas-phase corrosion inhibition packaging material. The vapor phase corrosion inhibitor for the steel comprises the following components in percentage by mass: 5.0%-7.0% of sodium phytate, 8%-10% of sodium glutamate, 0.2%-0.4% of cyclohexylamine methylurea, 8%-10% of ammonium phosphate, 0.2%-0.4% of a first component, 0.7%-1.8% of a second component and the balance of water, wherein the first component is selected from at least one of phytic acid and glutamic acid; the second component is prepared from menthol and limonene. The corrosion inhibition efficiency of the gas phase corrosion inhibitor for the steel can reach 90% or above, and the corrosion inhibition efficiency is high; when applied to cold-rolled steel plates such as automobile plates, tin-plated plates and chromium-plated plates, the cold-rolled steel plates can be effectively prevented from being corroded, and the surface tension of the steel plates can be kept to be larger than or equal to 32 mN / m, so that the steel plates have good coating performance and cleanliness, and the components are safe.

Description

Technical Field

[0001] The present application belongs to the field of vapor phase rust-proof materials, and specifically relates to a vapor phase corrosion inhibitor for steel, a vapor phase corrosion inhibitor packaging material for steel, and a method for preparing a vapor phase corrosion inhibitor packaging material for steel. Background Art

[0002] Cold-rolled steel plates produced by steel mills, such as automobile plates, tinplates and chrome-plated plates, usually need to be coated with iron sheets after being sent to downstream manufacturers before they can be used in actual production. Therefore, the steel plates are required to have excellent coating properties.

[0003] However, cold-rolled steel plates such as automobile plates, tinplates and chromeplates are prone to corrosion during transportation and storage, which affects the performance of the steel plates. In the related technology, vapor phase corrosion inhibition materials are usually used for packaging before transportation and storage. The vapor phase corrosion inhibitor on the vapor phase corrosion inhibition material is volatile and can be released in the relatively closed space formed by the packaging. It is physically or chemically adsorbed on the surface of the steel plate to form a protective film to prevent the steel plate from being corroded. However, after the existing vapor phase corrosion inhibition packaging materials are used for packaging and transportation to downstream manufacturers, poor coating performance often occurs. Summary of the invention

[0004] In order to solve at least one of the above technical problems, the purpose of the present application is to provide a vapor phase corrosion inhibitor for steel, a vapor phase corrosion inhibitor packaging material for steel, and a method for preparing a vapor phase corrosion inhibitor packaging material for steel.

[0005] To achieve one of the above application purposes, an embodiment of the present application provides a vapor phase corrosion inhibitor for steel, wherein the components thereof include, by mass percentage: 5.0% to 7.0% sodium phytate, 8% to 10% sodium glutamate, 0.2% to 0.4% cyclohexylaminomethyl urea, 8% to 10% ammonium phosphate, 0.2% to 0.4% of a first component, and 0.7% to 1.8% of a second component, and the remainder is water; Wherein, the first component is selected from at least one of phytic acid and glutamic acid; The second component includes menthol and limonene.

[0006] As a further improvement of one embodiment, the first component includes phytic acid and glutamic acid, and 0.2% to 0.4% of the first component specifically includes: 0.1% to 0.2% phytic acid and 0.1% to 0.2% glutamic acid.

[0007] As a further improvement of one embodiment, the second component also includes geranium oil and eucalyptol.

[0008] As a further improvement of one embodiment, 0.7% to 1.8% of the second component specifically includes: 0.1% to 0.2% menthol, 0.1% to 0.3% limonene, 0.2% to 0.5% geranium oil, and 0.3% to 0.8% eucalyptol.

[0009] In order to achieve the above-mentioned application purpose, one embodiment of the present application also provides a gas phase corrosion inhibition packaging material for steel, including a substrate and a gas phase corrosion inhibitor coating coated on the surface of the substrate; the gas phase corrosion inhibitor coating is formed by coating the gas phase corrosion inhibitor for steel as described above.

[0010] As a further improvement of one embodiment, the substrate is made of kraft paper, fiberboard or non-woven fabric.

[0011] As a further improvement of one embodiment, the mass per unit area of ​​the substrate is 80-120 g / m 2 , tensile strength ≥7kN / m, pH value is 6.8~7.2, and water content is 4~6%.

[0012] As a further improvement of one embodiment, the vapor corrosion inhibition packaging material for steel further includes a film, and the coating and the film are respectively located on two opposite surfaces of the substrate.

[0013] As a further improvement of one embodiment, the film is a polytetrafluoroethylene film.

[0014] As a further improvement of one embodiment, the moisture content of the steel vapor corrosion inhibition packaging material is 0-3%, and the moisture permeability is 0-5g / (m 2 24h), the contact corrosion level is 0, the vapor phase corrosion inhibition level is 0, and the corrosion inhibition efficiency is 90%~100%; When the packaging material is used for a steel plate, the surface tension of the steel plate can be maintained at ≥32 mN / m.

[0015] In order to achieve the above application purpose, an embodiment of the present application further provides a method for preparing a vapor phase corrosion inhibition packaging material for steel, comprising: Step S1. Substrate pretreatment Use hot air to blow the substrate surface at a constant temperature, the temperature of the hot air is 40~45℃; Step S2. Coating The aforementioned steel material vapor phase corrosion inhibitor is applied to one surface of the substrate to form a coating.

[0016] As a further improvement of one embodiment, the preparation method further comprises: Step S3: Laminating The film is adhered to the surface of the substrate facing away from the coating layer.

[0017] As a further improvement of an implementation mode, the step S3 specifically includes: using epoxy acrylate light-curing adhesive to bond the polytetrafluoroethylene film to the substrate, and then using ultraviolet light to cure.

[0018] As a further improvement of one embodiment, in step S3, before lamination, hot air is blown on the surface of the substrate facing away from the coating, the temperature of the hot air is controlled to be 40~45°C, the distance from the hot air outlet to the substrate is ≤0.8m, and the angle between the air outlet direction and the plane where the substrate is located is 40°~50°.

[0019] As a further improvement of one embodiment, in step S1, the distance from the hot air outlet to the substrate is controlled to be ≤0.8 m, and the angle between the air outlet direction and the plane where the substrate is located is 40°~50°.

[0020] As a further improvement of one embodiment, in step S2, the temperature of the vapor phase corrosion inhibitor for steel is controlled to be 50-60° C., and stirring is continued before coating.

[0021] As a further improvement of one embodiment, in step S2, the coating is carried out at 20-25°C, and the coating amount of the vapor phase corrosion inhibitor is 15-20 g / m 2 , the coating speed along the length direction of the substrate is 15-20 m / s; After coating, use hot air to dry the coating. Control the ambient temperature to 40~45℃, the temperature of the hot air to 40~45℃, the distance from the hot air outlet to the substrate to ≤1m, the angle between the outlet direction and the plane of the substrate to 85°~95°, and the air volume of the hot air to 10~20m 3 / min.

[0022] Compared with the prior art, the vapor phase corrosion inhibitor for steel, the vapor phase corrosion inhibitor packaging material for steel, and the preparation method of the vapor phase corrosion inhibitor packaging material for steel of the present application have the following beneficial effects: The corrosion inhibition efficiency can reach 90% or above, which is a high corrosion inhibition efficiency. When applied to cold-rolled steel plates that require surface coating, such as automotive plates, tin-plated plates and chrome-plated plates, it can not only effectively prevent the steel plates from being corroded, but also maintain the surface tension of the steel plates ≥32mN / m, so that the steel plates have good coating performance and cleanliness, and the ingredients are safe and environmentally friendly. DETAILED DESCRIPTION

[0023] The technical solution of the present application is further introduced below in conjunction with specific implementation methods, but the scope of protection required is not limited to the description.

[0024] An embodiment of the present application provides a vapor phase corrosion inhibitor for steel, wherein the components thereof include, by mass percentage: 5.0% to 7.0% sodium phytate, 8% to 10% sodium glutamate, 0.2% to 0.4% cyclohexylaminomethyl urea, 8% to 10% ammonium phosphate, 0.2% to 0.4% of a first component, and 0.7% to 1.8% of a second component, and the remainder is water; Wherein, the first component is selected from at least one of phytic acid and glutamic acid; The second component includes menthol and limonene.

[0025] Among them, sodium phytate, as a chelating agent, can produce a chelating effect with the metal. It can be adsorbed on the surface of the steel plate to improve the corrosion resistance of the steel plate and increase the surface tension of the steel plate, thereby improving the corrosion resistance of the steel plate and increasing the surface tension of the steel plate. Sodium phytate is weakly alkaline and can be combined with sodium glutamate and the phytic acid and glutamic acid in the first component to adjust the pH value of the vapor phase corrosion inhibitor so that the pH value of the vapor phase corrosion inhibitor is roughly in the neutral range, and the cost is low.

[0026] Sodium glutamate can improve the antioxidant capacity and corrosion resistance, further improve the surface tension of the steel plate, and sodium glutamate is also weakly alkaline, and can be used with sodium phytate and phytic acid and glutamic acid in the first component to adjust the pH value of the vapor phase corrosion inhibitor so that the pH value of the vapor phase corrosion inhibitor is roughly in the neutral range. The synergistic effect of sodium phytate and sodium glutamate can greatly improve the corrosion inhibition efficiency of the vapor phase corrosion inhibitor.

[0027] Cyclohexylamine methyl urea and ammonium phosphate can form a physical and chemical protective film on the surface of the steel plate to isolate corrosive pollutants. The protective film is a monomolecular layer and can form a relatively complete film layer on the surface of the steel plate, thereby better isolating the corrosive medium.

[0028] As a chelating agent, phytic acid can chelate with metals. It can be adsorbed on the surface of steel plates to improve the corrosion resistance of steel plates and the surface tension of steel plates, thereby improving the corrosion resistance of steel plates and increasing the surface tension of steel plates. Phytic acid is weakly acidic and can be combined with sodium phytate and sodium glutamate to adjust the pH value of the vapor phase corrosion inhibitor so that the pH value of the vapor phase corrosion inhibitor is roughly in the neutral range.

[0029] Glutamic acid can also enhance antioxidant capacity and corrosion resistance, further increase the surface tension of steel plates, and is weakly acidic. It can be combined with sodium phytate and sodium glutamate to adjust the pH value of the vapor phase corrosion inhibitor so that the pH value of the vapor phase corrosion inhibitor is roughly in the neutral range.

[0030] Menthol and limonene, as volatile agents, can enhance the volatility of vapor phase corrosion inhibitors, and also have a certain ability to enhance corrosion resistance, without affecting the surface tension of steel plates, and can also improve the smell of anti-rust paper.

[0031] After testing, the corrosion inhibition efficiency of the vapor phase corrosion inhibitor for steel can reach 90% or above, which is relatively high. When applied to cold-rolled steel plates that require surface coating, such as automotive plates, tin-plated plates and chrome-plated plates, it can not only effectively prevent the steel plates from being corroded, but also maintain the surface tension of the steel plates ≥32mN / m, thereby making the steel plates have good coating performance and cleanliness. Moreover, the composition of the vapor phase corrosion inhibitor is safe and environmentally friendly.

[0032] Preferably, the first component includes phytic acid and glutamic acid, and 0.2% to 0.4% of the first component specifically includes: 0.1% to 0.2% phytic acid and 0.1% to 0.2% glutamic acid. The corrosion inhibition efficiency of the vapor phase corrosion inhibitor can be greatly improved through the synergistic effect of phytic acid and glutamic acid.

[0033] That is to say, the components of the vapor phase corrosion inhibitor for steel, measured in mass percentage, preferably include: 5.0%~7.0% sodium phytate, 8%~10% sodium glutamate, 0.2%~0.4% cyclohexylaminomethyl urea, 8%~10% ammonium phosphate, 0.1%~0.2% phytic acid, 0.1%~0.2% glutamic acid, and 0.7%~1.8% of the second component, and the rest is water.

[0034] Preferably, the second component also includes geranium oil and eucalyptol, which can not only improve the odor of the vapor phase corrosion inhibitor but also have certain antioxidant properties and volatility.

[0035] Preferably, 0.7% to 1.8% of the second component specifically includes: 0.1% to 0.2% of menthol, 0.1% to 0.3% of limonene, 0.2% to 0.5% of geranium oil, and 0.3% to 0.8% of eucalyptol.

[0036] That is to say, the components of the vapor phase corrosion inhibitor for steel, measured in mass percentage, preferably include: 5.0%~7.0% sodium phytate, 8%~10% sodium glutamate, 0.2%~0.4% cyclohexylaminomethyl urea, 8%~10% ammonium phosphate, 0.2%~0.4% of the first component, 0.1%~0.2% of menthol, 0.1%~0.3% of limonene, 0.2%~0.5% of geranium oil, 0.3%~0.8% of eucalyptol, and the rest is water.

[0037] One embodiment of the present application also provides a gas phase corrosion inhibition packaging material for steel, which includes a substrate and a gas phase corrosion inhibitor coating applied on the surface of the substrate; the gas phase corrosion inhibitor coating is formed by coating the gas phase corrosion inhibitor for steel as described above. The water content of the gas phase corrosion inhibition packaging material is 0-3%.

[0038] After testing, it was found that the corrosion inhibition efficiency of the vapor phase corrosion inhibitor packaging material for steel can reach 90% or above, which is a relatively high corrosion inhibition efficiency. When applied to cold-rolled steel plates such as automotive plates, tin-plated plates and chrome-plated plates, it can not only effectively prevent the steel plates from being corroded, but also maintain the surface tension of the steel plates ≥32mN / m after the steel plates are sealed and packaged for more than 5 days, so that the steel plates have good coating performance and cleanliness, and the composition of the vapor phase corrosion inhibitor is safe and environmentally friendly.

[0039] The substrate can be made of kraft paper, fiberboard or non-woven fabric. By using special paper such as kraft paper, fiberboard or non-woven fabric, on the one hand, the substrate can be guaranteed to have certain strength, wear resistance and stability, so that when the steel plate is packaged, a relatively closed space can be formed in the packaging material to facilitate the volatilization of the vapor phase corrosion inhibitor and maintain a certain concentration; on the other hand, the substrate can have good processability and coatability to facilitate the coating of the vapor phase corrosion inhibitor.

[0040] Preferably, the substrate is made of kraft paper to help control costs.

[0041] Preferably, the mass per unit area of ​​the substrate is 80-120 g / m 2 , tensile strength ≥ 7kN / m, pH value 6.8~7.2, water content 0~3%. This ensures that the base material has a certain strength, wear resistance and stability, so that when the steel plate is packaged, a relatively closed space can be formed in the packaging material, and the durability of the packaging material can be improved; the pH value of the base material is controlled at 6.8~7.2, which helps to maintain the chemical stability of the packaging material and reduce corrosion caused by pH fluctuations.

[0042] The tensile strength of the substrate is ≥7 kN / m, which means that the tensile strength along any direction on the plane where the substrate is located is ≥7 kN / m.

[0043] The vapor corrosion inhibition packaging material for steel further comprises a film, and the coating and the film are respectively located on two opposite surfaces of the substrate, that is, the film is arranged on the surface of the substrate facing away from the coating. The film can not only prevent the packaging material from being scratched or cut, but also increase the sealing property of the packaging material, so as to form a relatively closed space in the packaging material after packaging.

[0044] The film is preferably a polytetrafluoroethylene film, which not only has a better bonding effect with the substrate, but is also corrosion-resistant, scratch-resistant, safe and environmentally friendly.

[0045] After testing, the moisture permeability of the vapor phase corrosion inhibition packaging material is 0~5g / (m 2·24h), the contact corrosion grade is 0, the vapor corrosion inhibition grade is 0, and the corrosion inhibition efficiency is 90%~100%, that is, it can effectively prevent the steel plate from being corroded; and when the packaging material is used for the steel plate, the surface tension of the steel plate can be maintained at ≥32mN / m, so that the steel plate has good coating performance and cleanliness.

[0046] One embodiment of the present application also provides a method for preparing the aforementioned gas phase corrosion inhibition packaging material for steel, that is, the aforementioned gas phase corrosion inhibition packaging material for steel is prepared using the preparation method.

[0047] The preparation method comprises the steps of: S1. Substrate pretreatment Use hot air to blow the substrate surface at a constant temperature, the temperature of the hot air is 40~45℃; S2. Coating The aforementioned steel material vapor phase corrosion inhibitor is applied to one surface of the substrate to form a coating.

[0048] In the above preparation method, the surface of the substrate can be cleaned by blowing hot air at a constant temperature, thereby improving the cleanliness and temperature of the substrate surface and preparing for the coating of the vapor phase corrosion inhibitor; by coating the aforementioned vapor phase corrosion inhibitor on one side of the substrate surface, the corrosion inhibition efficiency of the prepared packaging material can reach 90% or more, and the corrosion inhibition efficiency is relatively high; when applied to cold-rolled steel plates such as automotive plates, tinplates and chrome-plated plates, it can not only effectively prevent the steel plates from being corroded, but also maintain the surface tension of the steel plates at ≥32mN / m after the steel plates are sealed and packaged for more than 5 days, so that the steel plates have good coating performance and cleanliness, and are environmentally friendly.

[0049] In step S1, the substrate can be made of kraft paper, fiberboard or non-woven fabric. By using special paper such as kraft paper, fiberboard or non-woven fabric, on the one hand, it can be ensured that the substrate has a certain strength, wear resistance and stability, so that when the steel plate is packaged, a relatively closed space can be formed in the packaging material to facilitate the volatilization of the vapor phase corrosion inhibitor and maintain a certain concentration; on the other hand, the substrate can have good processability and coatability to facilitate the coating of the vapor phase corrosion inhibitor.

[0050] Preferably, the substrate is made of kraft paper to help control costs.

[0051] Preferably, the mass per unit area of ​​the substrate is 80-120 g / m 2, tensile strength ≥ 7kN / m, pH value 6.8~7.2, water content 4~6%. This ensures that the base material has a certain strength, wear resistance and stability, so that when the steel plate is packaged, a relatively closed space can be formed in the packaging material, and the durability of the packaging material can be improved; the pH value of the base material is controlled at 6.8~7.2, which helps to maintain the chemical stability of the packaging material and reduce corrosion caused by pH fluctuations.

[0052] The tensile strength of the substrate is ≥7 kN / m, which means that the tensile strength along any direction on the plane where the substrate is located is ≥7 kN / m.

[0053] Preferably, in step S1, the distance from the hot air outlet to the substrate is controlled to be ≤0.8m, and the angle between the air outlet direction and the plane where the substrate is located is 40°~50°, so as to improve the cleaning effect and cleaning efficiency of the substrate surface, and make the temperature of the substrate surface quickly reach the required temperature, thereby improving the preparation efficiency.

[0054] In the step S2, the temperature of the gas phase corrosion inhibitor for steel is controlled to be 50-60°C, and stirring is continued before coating to make the components of the gas phase corrosion inhibitor evenly distributed. The temperature of the gas phase corrosion inhibitor is controlled to be 50-60°C. On the one hand, the distribution uniformity of the components of the gas phase corrosion inhibitor can be improved, and on the other hand, the wetting ability of the gas phase corrosion inhibitor coating can be improved, thereby improving the diffusion efficiency of the gas phase corrosion inhibitor and its coverage on the substrate and coating uniformity.

[0055] In step S2, the coating is carried out at 20-25°C, and the coating amount of the vapor phase corrosion inhibitor is 15-20 g / m 2 , the coating speed along the length direction of the substrate is 15-20 m / s. By controlling the ambient temperature during coating to 20-25°C, problems such as uneven coating and shrinkage holes caused by a large temperature difference between the ambient temperature and the vapor phase corrosion inhibitor can be avoided; by controlling the coating speed and coating amount, the vapor phase corrosion inhibitor can be coated evenly and the coating amount can be guaranteed.

[0056] In step S2, after coating, the coating is dried with hot air until the coating surface is dry, the ambient temperature is controlled to be 40-45°C, the temperature of the hot air is controlled to be 40-45°C, the distance from the hot air outlet to the substrate is controlled to be ≤1m, the angle between the outlet direction and the plane where the substrate is located is 85°-95°, and the air volume of the hot air is controlled to be 10-20m 3 In this way, only the water in the vapor phase corrosion inhibitor can be volatilized to accelerate the drying.

[0057] Among them, surface dry, also known as dry to touch, refers to the stage where the wet coating has reached the surface dry stage, and the coating has changed from a flowable liquid state to a relatively non-flowable state and the surface begins to form a film; at this time, the coating no longer adheres to light and small particles.

[0058] After drying, the moisture content of the vapor phase corrosion inhibition packaging material is 0-3%.

[0059] Furthermore, the preparation method further comprises the steps of: S3. Lamination The film is adhered to the surface of the substrate facing away from the coating layer.

[0060] By laminating, the coating and the film are respectively located on two opposite surfaces of the substrate. The film can not only prevent the packaging material from being scratched or cut, but also increase the sealing of the packaging material, so as to form a relatively closed space in the packaging material after packaging.

[0061] The film is preferably a polytetrafluoroethylene film, which not only has a better bonding effect with the substrate, but is also corrosion-resistant, scratch-resistant, safe and environmentally friendly.

[0062] The step S3 specifically includes: bonding the polytetrafluoroethylene film to the substrate using epoxy acrylate light-curing adhesive, and then curing it using ultraviolet light. The use of ultraviolet light curing technology for lamination can improve the bonding strength between the film and the substrate, thereby better protecting the substrate and improving the durability of the packaging material.

[0063] The wavelength of ultraviolet light is 360~380nm, and the intensity of ultraviolet light is 200~500mW / cm 2 , exposure time is 1.5~3s, curing temperature is 20~25℃, and curing distance is 3~5cm.

[0064] In step S3, before laminating, the surface of the substrate facing away from the coating is purged with hot air, the temperature of the hot air is controlled to be 40-45°C, the distance from the hot air outlet to the substrate is ≤0.8m, and the angle between the outlet direction and the plane where the substrate is located is 40°-50°. By purging the surface of the substrate with hot air, the surface of the substrate can be cleaned, the cleanliness and temperature of the substrate surface can be improved, and better lamination is facilitated.

[0065] Furthermore, the preparation method further comprises the steps of: S4. Rolling The laminated packaging material is packaged into cylindrical rolls for easy storage and transportation.

[0066] In order to make the purpose, technical scheme and advantages of the present application clearer, the present embodiment will be further described below in combination with Examples 1 and 2 according to an embodiment of the present application. Obviously, the described Examples 1 and 2 are part of the embodiments of the present application, not all of the embodiments. Other embodiments based on the aforementioned embodiments do not deviate from the technical purpose of the present application.

[0067] Example 1 This embodiment provides a vapor phase corrosion inhibitor, a packaging material prepared using the vapor phase corrosion inhibitor, and a method for preparing the packaging material.

[0068] The components of the vapor phase corrosion inhibitor include, by mass percentage, 7.0% sodium phytate, 10% sodium glutamate, 0.4% cyclohexylaminomethyl urea, 10% ammonium phosphate, 0.2% phytic acid, 0.2% glutamic acid, 0.1% menthol, 0.1% limonene, 0.2% geranyl oil, 0.3% eucalyptol, and the remainder is water.

[0069] The method for preparing the packaging material comprises the steps of: S1. Substrate pretreatment The substrate surface is blown with hot air at a constant temperature of 45°C. The distance from the hot air outlet to the substrate is controlled to be 0.8m, and the angle between the air outlet direction and the plane where the substrate is located is 45°.

[0070] Among them, the base material is kraft paper, and the unit area mass of kraft paper is 100g / m 2 , tensile strength ≥7kN / m, pH value is 7.0, and water content is 4.5%.

[0071] S2. Coating The vapor phase corrosion inhibitor is applied on one surface of the kraft paper to form a coating.

[0072] The temperature of the vapor phase corrosion inhibitor was controlled at 50°C, and stirring was continued before coating. The coating was carried out at 25°C, and the coating amount of the vapor phase corrosion inhibitor was 20g / m 2 The coating speed along the length direction of the substrate is 15m / s.

[0073] After coating, the coating is dried with hot air until the coating surface is dry. During drying, the ambient temperature and the temperature of the hot air are controlled to be 40°C, the distance from the hot air outlet to the kraft paper is controlled to be 1m, the angle between the air outlet direction and the plane where the kraft paper is located is 90°, and the air volume of the hot air is 20m 3 / min. After drying, the moisture content of the vapor corrosion inhibition packaging material was measured to be 2.5%.

[0074] S3. Lamination Hot air is blown on the surface of the kraft paper facing away from the coating, the temperature of the hot air is controlled to be 45°C, the distance from the hot air outlet to the kraft paper is 0.8m, and the angle between the air outlet direction and the plane where the kraft paper is located is 45°.

[0075] Afterwards, the polytetrafluoroethylene film was adhered to the side of the kraft paper away from the coating using an epoxy acrylate light-curing adhesive and cured using ultraviolet light with a wavelength of 365 nm and an intensity of 300 mW / cm 2 , exposure time is 3s, curing temperature is 25℃, and curing distance is 3cm.

[0076] S4. Rolling The laminated packaging materials are packed into cylindrical rolls with a width of 2.4m and a core diameter of 0.2m.

[0077] The obtained vapor phase corrosion inhibition packaging material is subjected to performance testing, specifically including: (1) Moisture permeability test According to GB / T 1037-2021, the moisture permeability of the vapor phase corrosion inhibition packaging material is 3g / (mm 2 ·24h).

[0078] (2) Contact corrosion inspection According to the test of GB / T16266-2019, the contact corrosion level of the vapor phase corrosion inhibition packaging material was measured to be level 0.

[0079] (3) Vapor phase rust prevention test According to the test of GB / T 16267-2008, the vapor phase corrosion inhibition grade of the vapor phase corrosion inhibition packaging material was measured to be 0, and the corrosion inhibition efficiency was 96%.

[0080] The above performances all meet the standard requirements.

[0081] (4) Contact surface tension test The tinplate was packaged with the vapor corrosion inhibition packaging material, and the surface tension of the tinplate was tested 5 days after packaging. The test was carried out by the dyne pen test method with reference to ASTM D7541-11 (2022). The specific test method was as follows: different types of dyne pens were used to make uniform lines along the vertical direction of the rolling grain. If the pen mark does not shrink within 2.5 seconds, it means that the surface tension of the tinplate meets the dyne value of the dyne pen. The highest dyne value that the tinplate can meet is used to characterize the surface tension of the tinplate. The surface tension of the tinplate after 5 days of packaging is measured to be 33mN / m, and the coating performance is good during iron printing coating.

[0082] Example 2 This embodiment also provides a vapor phase corrosion inhibitor, a packaging material prepared using the vapor phase corrosion inhibitor, and a method for preparing the packaging material.

[0083] The components of the vapor phase corrosion inhibitor include, by mass percentage, 5.0% sodium phytate, 8% sodium glutamate, 0.2% cyclohexylaminomethyl urea, 10% ammonium phosphate, 0.1% phytic acid, 0.2% glutamic acid, 0.2% menthol, 0.3% limonene, 0.5% geranium oil, 0.8% eucalyptol, and the remainder is water.

[0084] The method for preparing the packaging material comprises the steps of: S1. Substrate pretreatment The substrate surface was blown with hot air at a constant temperature of 40°C. The distance from the hot air outlet to the substrate was controlled to be 0.5m, and the angle between the air outlet direction and the plane where the substrate was located was 45°.

[0085] Among them, the base material is kraft paper, and the unit area mass of kraft paper is 80g / m 2 , tensile strength ≥7kN / m, pH value is 6.8, and water content is 5.5%.

[0086] S2. Coating The vapor phase corrosion inhibitor is applied on one surface of the kraft paper to form a coating.

[0087] The temperature of the vapor phase corrosion inhibitor was controlled at 55°C, and stirring was continued before coating. The coating was carried out at 25°C, and the coating amount of the vapor phase corrosion inhibitor was 15g / m 2 The coating speed along the length direction of the substrate is 20m / s.

[0088] After coating, the coating is dried with hot air until the coating surface is dry. During drying, the ambient temperature and the temperature of the hot air are controlled to be 40°C, the distance from the hot air outlet to the kraft paper is controlled to be 0.5m, the angle between the air outlet direction and the plane where the kraft paper is located is 90°, and the air volume of the hot air is 10m 3 / min. After drying, the moisture content of the vapor corrosion inhibition packaging material was measured to be 2%.

[0089] S3. Lamination Hot air is blown on the surface of the kraft paper facing away from the coating, the temperature of the hot air is controlled to be 40°C, the distance from the hot air outlet to the kraft paper is 0.5m, and the angle between the air outlet direction and the plane where the kraft paper is located is 45°.

[0090] Afterwards, the polytetrafluoroethylene film was adhered to the side of the kraft paper away from the coating using an epoxy acrylate light-curing adhesive and cured using ultraviolet light with a wavelength of 370 nm and an intensity of 450 mW / cm 2 , exposure time is 2s, curing temperature is 25℃, and curing distance is 3cm.

[0091] S4. Rolling The laminated packaging materials are packed into cylindrical rolls with a width of 2m and a core diameter of 0.15m.

[0092] The obtained vapor phase corrosion inhibition packaging material is subjected to performance testing, specifically including: (1) Moisture permeability test According to GB / T 1037-2021, the moisture permeability of the vapor phase corrosion inhibition packaging material is 2g / (mm 2 ·24h).

[0093] (2) Contact corrosion inspection According to the test of GB / T16266-2019, the contact corrosion level of the vapor phase corrosion inhibition packaging material was measured to be level 0.

[0094] (3) Vapor phase rust prevention test According to the test of GB / T 16267-2008, the vapor phase corrosion inhibition grade of the vapor phase corrosion inhibition packaging material was measured to be 0, and the corrosion inhibition efficiency was 91%.

[0095] The above performances all meet the standard requirements.

[0096] (4) Contact surface tension test The chrome-plated plate was packaged with the vapor corrosion inhibition packaging material, and the surface tension of the chrome-plated plate was tested 5 days after packaging. The test was carried out by the dyne pen test method with reference to ASTM D7541-11 (2022). The specific test method is: use different types of dyne pens to make uniform lines along the vertical direction of the rolling grain. If the pen does not shrink within 2.5s, it means that the surface tension of the chrome-plated plate meets the dyne value of the dyne pen. The highest dyne value that the chrome-plated plate can meet is used to characterize the surface tension of the chrome-plated plate. The surface tension of the chrome-plated plate after 5 days of packaging is measured to be 34mN / m, and the coating performance is good during iron printing coating.

[0097] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0098] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of the present application. They are not intended to limit the scope of protection of the present application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A vapor phase corrosion inhibitor for steel, characterized in that: Its components include, by mass percentage: 5.0% to 7.0% sodium phytate, 8% to 10% sodium glutamate, 0.2% to 0.4% cyclohexylamine methyl urea, 8% to 10% ammonium phosphate, 0.2% to 0.4% of the first component, 0.7% to 1.8% of the second component, and the rest is water; Wherein, the first component is selected from at least one of phytic acid and glutamic acid; The second component includes menthol and limonene.

2. The vapor phase corrosion inhibitor for steel according to claim 1, characterized in that: The first component includes phytic acid and glutamic acid, and 0.2% to 0.4% of the first component specifically includes: 0.1% to 0.2% phytic acid and 0.1% to 0.2% glutamic acid.

3. The vapor phase corrosion inhibitor for steel according to claim 1, characterized in that: The second component also includes geranyl oil and eucalyptol.

4. The vapor phase corrosion inhibitor for steel according to claim 3, characterized in that: The second component of 0.7% to 1.8% specifically includes: menthol 0.1% to 0.2%, limonene 0.1% to 0.3%, geranium oil 0.2% to 0.5%, and eucalyptol 0.3% to 0.8%.

5. A vapor phase corrosion inhibition packaging material for steel, characterized in that: It comprises a substrate and a vapor phase corrosion inhibitor coating applied on the surface of the substrate; the vapor phase corrosion inhibitor coating is formed by coating the vapor phase corrosion inhibitor for steel as described in any one of claims 1 to 4.

6. The vapor phase corrosion inhibition packaging material for steel according to claim 5, characterized in that: The substrate is made of kraft paper, fiberboard or non-woven fabric.

7. The vapor phase corrosion inhibition packaging material for steel according to claim 5, characterized in that: The mass per unit area of ​​the substrate is 80-120 g / m 2 , tensile strength ≥7kN / m, pH value is 6.8~7.2, and water content is 4~6%.

8. The vapor phase corrosion inhibition packaging material for steel according to claim 5, characterized in that: Also included is a film, wherein the coating and the film are respectively located on two opposite surfaces of the substrate.

9. The vapor phase corrosion inhibition packaging material for steel according to claim 8, characterized in that: The film is a polytetrafluoroethylene film.

10. The vapor corrosion inhibition packaging material for steel according to claim 5, characterized in that: Its water content is 0~3%, and its moisture permeability is 0~5g / (m 2 24h), the contact corrosion level is 0, the vapor phase corrosion inhibition level is 0, and the corrosion inhibition efficiency is 90%~100%; When the packaging material is used for a steel plate, the surface tension of the steel plate can be maintained at ≥32 mN / m.

11. A method for preparing a vapor phase corrosion inhibition packaging material for steel, characterized in that: include: Step S1. Substrate pretreatment Use hot air to blow the substrate surface at a constant temperature, the temperature of the hot air is 40~45℃; Step S2. Coating The vapor phase corrosion inhibitor for steel materials according to any one of claims 1 to 4 is applied to one surface of the substrate to form a coating.

12. The preparation method according to claim 11, characterized in that: The preparation method further comprises: Step S3: Laminating The film is adhered to the surface of the substrate facing away from the coating.

13. The preparation method according to claim 12, characterized in that: The step S3 specifically includes: bonding the polytetrafluoroethylene film to the substrate using epoxy acrylate light-curing adhesive, and then curing it using ultraviolet light.

14. The preparation method according to claim 12, characterized in that: In the step S3, before lamination, hot air is blown on the surface of the substrate facing away from the coating, the temperature of the hot air is controlled to be 40-45°C, the distance from the hot air outlet to the substrate is ≤0.8m, and the angle between the air outlet direction and the plane where the substrate is located is 40°-50°.

15. The preparation method according to claim 11, characterized in that: In step S1, the distance from the hot air outlet to the substrate is controlled to be ≤0.8 m, and the angle between the air outlet direction and the plane where the substrate is located is 40°-50°.

16. The preparation method according to claim 11, characterized in that: In the step S2, the temperature of the vapor phase corrosion inhibitor for steel is controlled to be 50-60° C., and stirring is continued before coating.

17. The preparation method according to claim 11, characterized in that: In step S2, the coating is carried out at 20-25°C, and the coating amount of the vapor phase corrosion inhibitor is 15-20 g / m 2 , the coating speed along the length direction of the substrate is 15-20 m / s; After coating, use hot air to dry the coating. Control the ambient temperature to 40~45℃, the temperature of the hot air to 40~45℃, the distance from the hot air outlet to the substrate to ≤1m, the angle between the outlet direction and the plane of the substrate to 85°~95°, and the air volume of the hot air to 10~20m 3 / min.