Anodized alloy product, method for anodizing titanium-aluminum alloy product and combined liquid

Abstract

The embodiment of the invention discloses an anodizing alloy product, a titanium-aluminum alloy product anodizing method and combined liquid. The combined liquid comprises a titanium alloy anodizing liquid medicine and an aluminum-titanium alloy anodizing liquid medicine. The method can be used for protecting titanium-aluminum alloy products.

Description

Technical Field

[0001] The invention relates to the technical field of titanium-aluminium alloy anodization, and in particular to an anodized alloy product, a method for anodizing a titanium-aluminium alloy product and a combined liquid. Background Art

[0002] like Figure 1-2 As shown, the housing of some electronic devices (such as mobile phones, tablet computers, etc.) includes a frame 10 with a connection hole 110 at the peripheral side and a middle plate 20 connected to the connection hole 110 of the frame 10.

[0003] With the development of electronic equipment technology, the materials used to make frames have evolved from plastic to stainless steel, to aluminum alloy, and then to titanium alloy. Titanium alloy is lighter and more resistant to oxidation, which makes its use in mobile phones a major trend. However, in order to save costs, the materials used to make the middle plate (especially the middle plate of mobile phones) are still aluminum alloy.

[0004] The corrosion resistance and other properties of aluminum alloy usually require anodizing for protection. During the anodizing process, the titanium-aluminum alloy shell composed of a titanium alloy frame and an aluminum alloy middle plate is generally anodized together with an oxidizing solution, and then post-oxidation treatment (such as wire drawing, polishing, CNC, cleaning, PVD, etc.) is performed to obtain an anodized titanium-aluminum alloy shell.

[0005] However, the existing anodizing solution and process cannot meet the performance requirements of the aluminum anodic film during the processing of titanium-aluminum alloy shells, nor can it effectively ensure that the titanium of the frame is not corroded by the solution during the anodizing process. Specifically, during the anodizing process of the middle plate aluminum material, the titanium alloy is corroded and discolored; and during the processing of the titanium alloy, the middle plate aluminum material has the problem of cracking the anodic film. Summary of the invention

[0006] One purpose of the embodiments of the present application is to solve at least one problem in the above background and provide corresponding beneficial effects.

[0007] Another object of an embodiment of the present application is to provide a combined liquid for anodizing a titanium-aluminum alloy product, which can be used to protect the titanium-aluminum alloy product and prevent the titanium alloy from fading and the aluminum alloy film from cracking.

[0008] Another object of an embodiment of the present application is to provide a method for anodizing a titanium-aluminum alloy product, which can be used to protect the titanium-aluminum alloy product and prevent the titanium alloy from fading and the aluminum alloy film from cracking.

[0009] Another object of an embodiment of the present application is to provide an anodized alloy product with good performance.

[0010] The embodiments of the present application mainly achieve the above objectives through the following technical solutions.

[0011] In one aspect, the embodiment of the present application provides a combined solution for anodizing a titanium-aluminum alloy product, comprising: titanium alloy anodizing solution and aluminum-titanium alloy anodizing solution; wherein:

[0012] The titanium alloy anodizing solution comprises: taking a titanium alloy anodizing solution base liquid and water; wherein the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L; wherein the preparation method of the titanium alloy anodizing solution base liquid comprises: dissolving a first sodium metavanadate with a first water to obtain a sodium metavanadate aqueous solution; mixing a phosphoric acid solution, glycerol, and the sodium metavanadate aqueous solution, stirring evenly, adding a first sulfuric acid solution, stirring evenly, to obtain a titanium alloy anodizing solution base liquid; wherein the sum of the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water is 100 parts, and the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water are 0.2-0.4 parts, 60-70 parts, 0.5-1.2 parts, 3-7 parts, and the remainder, respectively;

[0013] The aluminum alloy anodizing solution comprises an aluminum alloy anodizing solution base liquid and water; wherein the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300 g / L; wherein the preparation method of the aluminum alloy anodizing solution base liquid comprises: taking a second water, adding tartaric acid to the second water and stirring evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution; adding a second sodium metavanadate to the tartaric acid aqueous solution and stirring evenly to dissolve the sodium metavanadate to obtain a first mixed solution; adding Add sodium molybdate and stir evenly to dissolve the sodium molybdate to obtain a second mixed solution; add a second sulfuric acid solution to the second mixed solution, stir evenly to obtain an aluminum alloy anodizing solution base liquid; wherein the sum of the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water is 100 parts, and the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water are 6-9 parts, 0.5-1.0 parts, 0.5-1.0 parts, 23-27 parts and the remainder, respectively.

[0014] In some technical schemes, the first sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; the second sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; and the phosphoric acid solution is selected from a phosphoric acid solution with a mass fraction of 85%.

[0015] In one aspect, an embodiment of the present application provides a method for anodizing a titanium-aluminum alloy product, comprising:

[0016] The cleaned titanium-aluminum alloy product is placed in a titanium alloy anodizing solution for anodizing the titanium alloy to obtain a titanium anodized product; wherein the parameters of the titanium alloy anodizing include: (26±2)V*(16±2)℃*(3±1)min; the titanium alloy anodizing solution includes a titanium alloy anodizing solution base liquid and water; wherein the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L; wherein the preparation method of the titanium alloy anodizing solution base liquid includes: dissolving a first sodium metavanadate with a first water; , obtaining a sodium metavanadate aqueous solution; mixing a phosphoric acid solution, glycerol, and the sodium metavanadate aqueous solution, stirring evenly, adding a first sulfuric acid solution, stirring evenly, and obtaining a titanium alloy anodizing agent base liquid; wherein the sum of the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water is 100 parts, and the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water are 0.2-0.4 parts, 60-70 parts, 0.5-1.2 parts, 3-7 parts, and the remainder, respectively;

[0017] washing the titanium anodized product with water to obtain a washed titanium anodized product;

[0018] The cleaned titanium anodized product is placed in an aluminum alloy anodizing solution for anodizing the aluminum alloy to obtain a titanium aluminum anodized product; wherein the parameters of the aluminum alloy anodizing include: (21±2)V*(21±2)℃*(45±5)min; the aluminum alloy anodizing solution includes taking an aluminum alloy anodizing solution base liquid and water; wherein the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L; wherein the preparation method of the aluminum alloy anodizing solution base liquid comprises: taking a second water, adding tartaric acid to the second water and stirring evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution; adding the tartaric acid to the tartaric acid solution A second sodium metavanadate is added to the aqueous solution and stirred evenly to dissolve the sodium metavanadate to obtain a first mixed solution; sodium molybdate is added to the first mixed solution and stirred evenly to dissolve the sodium molybdate to obtain a second mixed solution; a second sulfuric acid solution is added to the second mixed solution and stirred evenly to obtain an aluminum alloy anodizing solution base liquid; wherein the sum of the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water is 100 parts, and the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water are 6-9 parts, 0.5-1.0 parts, 0.5-1.0 parts, 23-27 parts and the remainder, respectively.

[0019] In some technical solutions, the method for anodizing a titanium-aluminum alloy product further includes:

[0020] The titanium-aluminum anodized product is subjected to anodizing post-treatment to obtain an anodized titanium-aluminum alloy product.

[0021] In some technical solutions, the anodized titanium-aluminum product is subjected to anodizing post-treatment to obtain an anodized titanium-aluminum alloy product, comprising:

[0022] The titanium-aluminum anodized product is subjected to pre-sealing and sealing treatments, and is washed with pure water and dried to obtain a sealed product;

[0023] The sealed product is then subjected to wire drawing, polishing, cleaning, CNC processing of titanium frame chamfering, cleaning and PVD treatment in sequence to obtain anodized titanium aluminum alloy products.

[0024] In some technical solutions, the method for anodizing a titanium-aluminum alloy product further includes:

[0025] Take the titanium-aluminum alloy product to be tested, clean the oil stains on the surface of the titanium-aluminum alloy product with an acidic degreasing agent and wash it with clean water to obtain the degreased titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from a sulfuric acid solution with a mass concentration of 20%;

[0026] Deashing the degreased titanium-aluminum alloy product with a first acidic deashing agent, and cleaning the deashed titanium-aluminum alloy product with clean water; wherein the first acidic deashing agent is selected from nitric acid;

[0027] The titanium-aluminum alloy product after ash removal is subjected to alkali washing treatment with alkali solution to remove the natural oxide film on the surface of the titanium-aluminum alloy product, and then cleaned with clean water to obtain the titanium-aluminum alloy product after alkali washing; wherein the alkali solution is selected from a sodium hydroxide solution with a mass fraction of 4%;

[0028] The titanium-aluminum alloy product after alkali washing is deashed with a second acidic deashing agent and cleaned with clean water to obtain a cleaned titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from nitric acid.

[0029] In some technical solutions, the first sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; the second sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%;

[0030] The phosphoric acid solution is selected from a phosphoric acid solution with a mass fraction of 85%.

[0031] In some technical solutions, the titanium-aluminum alloy product includes a titanium alloy part and an aluminum alloy part, and the titanium alloy part is connected to the aluminum alloy part.

[0032] In some technical solutions, the titanium alloy part has a connection hole (such as Figure 4 As shown), the aluminum alloy part is connected to the connecting hole; the connecting hole is a through hole.

[0033] In one aspect, an embodiment of the present application provides an anodized alloy product selected from the titanium-aluminum anodized product or the anodized titanium-aluminum alloy product.

[0034] In one aspect, the present application embodiment provides a titanium alloy anodizing solution base liquid, which includes the following components in parts by weight: 3-7 parts of sulfuric acid solution, 60-70 parts of phosphoric acid solution, 0.5-1.2 parts of glycerol, 0.2-0.4 parts of sodium metavanadate, and the balance of water;

[0035] The total weight of all components of the titanium alloy anodizing solution base liquid is 100 parts.

[0036] In some embodiments, the sulfuric acid solution is a concentrated sulfuric acid solution with a mass fraction of 98%, and the phosphoric acid solution is a phosphoric acid solution with a mass fraction of 85%.

[0037] In one aspect, the present invention provides a method for preparing a titanium alloy anodizing solution, comprising the following steps:

[0038] Dissolving sodium metavanadate with water to obtain a sodium metavanadate aqueous solution;

[0039] Phosphoric acid, glycerol and the sodium metavanadate aqueous solution are mixed and stirred evenly, and then sulfuric acid is added and stirred evenly to obtain a titanium alloy anodizing solution base liquid;

[0040] Wherein, the sum of the mass parts of the sodium metavanadate, the phosphoric acid solution, the glycerol, the sulfuric acid solution and the water is 100 parts.

[0041] In one aspect, the present invention provides a method for preparing a titanium alloy anodizing solution, comprising the following steps:

[0042] The titanium alloy anodizing solution base liquid is taken, grooved at a concentration of 200-300 g / L, and the sulfuric acid concentration is adjusted to 70-110 g / L to obtain the titanium alloy anodizing solution.

[0043] In one aspect, an embodiment of the present application provides a titanium alloy anodizing solution, which is prepared according to the aforementioned method for preparing the titanium alloy anodizing solution.

[0044] In one aspect, the present invention provides an aluminum alloy anodizing solution base solution, comprising the following components:

[0045] 6-9 parts of sulfuric acid solution, 0.5-1.0 parts of sodium molybdate, 0.5-1.0 parts of sodium metavanadate, 23-27 parts of tartaric acid and the balance of water;

[0046] The total weight of all components of the aluminum alloy anodizing solution base liquid is 100 parts.

[0047] In some embodiments, the sulfuric acid solution is a concentrated sulfuric acid solution with a mass fraction of 98%.

[0048] In one aspect, the present invention provides a method for preparing an aluminum alloy anodizing solution, comprising the following steps:

[0049] Add tartaric acid to water and stir evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution;

[0050] Then, adding sodium metavanadate to the tartaric acid aqueous solution and stirring evenly to dissolve the sodium metavanadate to obtain a first mixed solution;

[0051] adding sodium molybdate to the first mixed solution again and stirring evenly to dissolve the sodium molybdate to obtain a second mixed solution;

[0052] Finally, sulfuric acid is added to the second mixed solution and stirred evenly to obtain an aluminum alloy anodizing solution base solution.

[0053] In one aspect, the present invention provides a method for preparing an aluminum alloy anodizing solution, comprising the following steps:

[0054] The aluminum alloy anodizing solution base liquid is taken, grooved at a concentration of 200-300 g / L, and the sulfuric acid concentration is adjusted to 65-75 g / L to obtain the titanium alloy anodizing solution.

[0055] In one aspect, an embodiment of the present application provides an aluminum alloy anodizing solution, which is prepared according to the aforementioned method for preparing the aluminum alloy anodizing solution.

[0056] The beneficial effects of the embodiments of the present invention include:

[0057] In some embodiments, the combined liquid for anodizing the titanium-aluminum alloy product provided in the embodiments of the present application can be used to protect the titanium-aluminum alloy product.

[0058] In some embodiments, the method for anodizing a titanium-aluminum alloy product provided in the embodiments of the present application can be used to protect the titanium-aluminum alloy product.

[0059] In some embodiments, the anodized alloy product provided by the embodiments of the present application has good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1A schematic diagram of a housing of an electronic device in the background art;

[0061] Figure 2 A schematic diagram of a frame of a housing of an electronic device in the background art;

[0062] Figure 3 A schematic diagram of a titanium aluminum alloy product in an embodiment of the present application;

[0063] Figure 4 It is a schematic diagram of the titanium alloy part in the embodiment of the present application. DETAILED DESCRIPTION

[0064] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0065] The terms "first", "second", "third", "fourth", "fifth", "sixth", etc. in the embodiments of the present application are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include at least one of the features.

[0066] Furthermore, the terms "comprises", "includes", "contains" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0067] It should also be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0068] In addition to the above, it is still necessary to emphasize that the reference to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0069] In a first aspect, an embodiment of the present application provides a titanium alloy anodizing solution base liquid, which comprises the following components in parts by weight:

[0070] 3-7 parts of sulfuric acid solution, 60-70 parts of phosphoric acid solution, 0.5-1.2 parts of glycerol, 0.2-0.4 parts of sodium metavanadate and the balance of water;

[0071] The total weight of all components of the titanium alloy anodizing solution base liquid is 100 parts.

[0072] In some embodiments, the sulfuric acid solution is a concentrated sulfuric acid solution with a mass fraction of 98%, that is, the sulfuric acid solution is prepared from sulfuric acid and water, wherein the mass fraction of sulfuric acid in the sulfuric acid solution is 98%.

[0073] In some embodiments, the phosphoric acid solution is a phosphoric acid solution with a mass fraction of 85%; that is, the phosphoric acid solution is prepared from sulfuric acid and water, wherein the mass fraction of phosphoric acid in the phosphoric acid solution is 85%.

[0074] In a second aspect, the present application provides a method for preparing a titanium alloy anodizing solution base liquid, comprising the following steps:

[0075] S101, taking a first container, dissolving sodium metavanadate with water to obtain a sodium metavanadate aqueous solution; the first container can be a cylinder;

[0076] S102, sequentially adding phosphoric acid solution, glycerol, and the sodium metavanadate aqueous solution in step S101 into the first container, stirring evenly, and finally adding sulfuric acid solution, stirring evenly, to obtain a titanium alloy anodizing solution base liquid;

[0077] Wherein, the sum of the mass parts of the sodium metavanadate, the phosphoric acid solution, the glycerol, the sulfuric acid solution and the water is 100 parts.

[0078] The second aspect is a method for preparing a titanium alloy anodizing solution base liquid, which can be used to prepare the titanium alloy anodizing solution base liquid described in the first aspect.

[0079] In a third aspect, the present application provides a method for preparing a titanium alloy anodizing solution, which comprises the following steps, measured in parts by weight:

[0080] S110, take the titanium alloy anodizing solution base liquid described in the first aspect or the titanium alloy anodizing solution base liquid prepared in the second aspect, slot it according to the concentration of 200-300g / L, adjust the sulfuric acid concentration to 70-110g / L, and obtain the titanium alloy anodizing solution. The titanium alloy anodizing solution base liquid is slotted, specifically, the titanium alloy anodizing solution base liquid and water can be mixed in the first solution container to form the titanium alloy anodizing solution; wherein, the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L (that is, the mass of the titanium alloy anodizing solution base liquid per liter of the titanium alloy anodizing solution is 200-300g), and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 70-110g / L.

[0081] Exemplarily, the first water container may be a tank.

[0082] In a fourth aspect, an embodiment of the present application provides a titanium alloy anodizing solution prepared according to the aforementioned method.

[0083] The titanium alloy anodizing solution provided in the embodiment of the present application can form an oxide film on the titanium material, thereby improving the corrosion resistance of titanium and preventing or reducing the erosion of titanium by the solution in subsequent processes.

[0084] In a fifth aspect, the present application provides an aluminum alloy anodizing solution base liquid, comprising the following components:

[0085] 6-9 parts of sulfuric acid solution, 0.5-1.0 parts of sodium molybdate, 0.5-1.0 parts of sodium metavanadate, 23-27 parts of tartaric acid and the balance of water;

[0086] The total weight of all components of the aluminum alloy anodizing solution base liquid is 100 parts.

[0087] In a sixth aspect, an embodiment of the present application provides a method for preparing an aluminum alloy anodizing solution base liquid, comprising the following steps:

[0088] S201, taking a second container, and adding water into the second container; the second container may be a cylinder;

[0089] S202, adding tartaric acid to the water in the second container and stirring evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution;

[0090] S203, adding sodium metavanadate to the tartaric acid aqueous solution in the second container and stirring evenly to dissolve the sodium metavanadate to obtain a first mixed solution;

[0091] S204, adding sodium molybdate to the first mixed solution in the second container again and stirring evenly to dissolve the sodium molybdate to obtain a second mixed solution;

[0092] S205. Finally, add sulfuric acid to the second mixed solution in the second container and stir evenly to obtain an aluminum alloy anodizing solution base solution.

[0093] The method for preparing the aluminum alloy anodizing solution base liquid of the sixth aspect can be used to prepare the aluminum alloy anodizing solution base liquid described in the fifth aspect.

[0094] In a seventh aspect, an embodiment of the present application provides a method for preparing an aluminum alloy anodizing solution, comprising the following steps:

[0095] S210. Take the aluminum alloy anodizing solution base liquid described in the fifth aspect or the aluminum alloy anodizing solution base liquid prepared in the sixth aspect, perform grooving at a concentration of 200-300 g / L, adjust the sulfuric acid concentration to 65-75 g / L, and obtain titanium alloy anodizing solution.

[0096] The aluminum alloy anodizing solution base liquid is grooved. Specifically, the aluminum alloy anodizing solution base liquid and water can be mixed in a second solution container to form an aluminum alloy anodizing solution; wherein the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L (that is, the mass of the aluminum alloy anodizing solution base liquid per liter of aluminum alloy anodizing solution is 200-300g), and the mass concentration of sulfuric acid in the aluminum alloy anodizing solution is 65-75g / L.

[0097] Exemplarily, the second medicine container may be a tank.

[0098] In an eighth aspect, an embodiment of the present application provides an aluminum alloy anodizing solution prepared according to the aforementioned method.

[0099] The aluminum alloy anodizing solution provided in the embodiment of the present application can improve the performance of aluminum materials in resisting film cracking.

[0100] In addition, in some embodiments, the aluminum alloy anodizing solution provided in the embodiments of the present application can also improve the corrosion resistance of the aluminum oxide film,

[0101] In some embodiments, the aluminum alloy anodizing solution provided in the embodiments of the present application can also improve the sealing performance of the anode film.

[0102] In a ninth aspect, the present application provides a composition liquid, comprising:

[0103] The titanium alloy anodizing solution described in the fourth embodiment; and

[0104] In an eighth aspect, the aluminum alloy anodizing solution.

[0105] In a tenth aspect, an embodiment of the present application provides a method for anodizing a titanium aluminum alloy product, comprising the following steps S305-S308:

[0106] Step S305, placing the cleaned titanium-aluminum alloy product into titanium alloy anodizing solution to perform anodizing treatment on the titanium alloy to obtain a titanium anodized product; wherein the titanium alloy anodizing parameters include: (26±2)V*(16±2)℃*(3±1)min;

[0107] Regarding the anodizing parameters of titanium alloy, it should be noted that the voltage of the anodizing treatment is between 24 and 28 volts, the temperature of the anodizing treatment is between 14 and 18 degrees Celsius, and the time of the anodizing treatment is between 2 and 4 minutes.

[0108] Step S306, washing the titanium anodized product with pure water to obtain a washed titanium anodized product;

[0109] Step S307, placing the cleaned titanium anodized product into an aluminum alloy anodizing solution for anodizing the aluminum alloy to obtain a titanium aluminum anodized product; wherein the aluminum alloy anodizing parameters include: (21±2)V*(21±2)℃*(45±5)min; Regarding the aluminum alloy anodizing parameters, it should be noted that the anodizing voltage is between 19 and 23 volts, the anodizing temperature is between 19 and 23 degrees Celsius, and the anodizing time is between 40 and 50 minutes.

[0110] Step S308, performing anodizing post-treatment on the titanium-aluminum anodized product to obtain an anodized titanium-aluminum alloy product.

[0111] The above-mentioned method of anodizing titanium-aluminum alloy products can be used to solve the two main problems encountered in the processing of titanium-aluminum alloys through the development of a new anode solution and a supporting two-stage anode process: one is the problem of corrosion and discoloration of the titanium surface when the aluminum anode generates a protective anodic film; the other is the problem of aluminum film cracking during the subsequent titanium processing.

[0112] In addition, the problem of deterioration of the sealing performance and corrosion resistance of aluminum during the subsequent titanium processing can also be solved.

[0113] It is easy to understand that the method for anodizing a titanium-aluminum alloy product according to the embodiment of the present application can improve the yield rate and process stability of the anodizing of the titanium-aluminum alloy product and save the manufacturing cost of the product.

[0114] In some embodiments, the titanium aluminum anodized product is subjected to anodizing post-treatment to obtain an anodized titanium aluminum alloy product, comprising:

[0115] The titanium-aluminum anodized product is subjected to pre-sealing and sealing treatments, and is washed with pure water and dried to obtain a sealed product;

[0116] The sealed product is then subjected to wire drawing, polishing, cleaning, CNC processing of titanium frame chamfering (using a CNC milling cutter to process the chamfer of the titanium frame), cleaning and PVD (physical vapor deposition process) processing in sequence to obtain anodized titanium aluminum alloy products.

[0117] The pore sealing treatment of the oxide film after anodizing by adsorption, chemical reaction or other mechanisms can be used to increase the stain resistance and corrosion resistance of the oxide film, improve the durability of the oxide film color and achieve other required properties.

[0118] It can be understood that in some embodiments, when the titanium-aluminum alloy product is a mobile phone shell, through the above-mentioned method of anodizing the titanium-aluminum alloy product, during the CNC, polishing, wire drawing, grinding and cleaning, and PVD processing of the titanium-aluminum alloy mobile phone frame and the middle plate together and after anodization, not only can the performance of the middle plate aluminum alloy anode film not be damaged during the CNC processing of the titanium alloy of the four side frames of the mobile phone, but it can also ensure that the titanium alloy of the four side frames of the mobile phone is not corroded by the chemical during the anodizing process of the middle plate aluminum, and ensure that after the final titanium alloy processing is completed, the performance of the aluminum alloy can meet the various performance test requirements of the aluminum anode film.

[0119] In some embodiments, the method for obtaining the cleaned titanium aluminum alloy product comprises the following steps:

[0120] Step S301, take the titanium-aluminum alloy product to be tested, clean the oil on the surface of the titanium-aluminum alloy product with an acidic degreasing agent and wash it with clean water to obtain the degreased titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from a sulfuric acid solution with a mass concentration of 20% (the sulfuric acid solution is prepared by sulfuric acid and water, wherein the mass concentration of sulfuric acid in the sulfuric acid solution is 20%);

[0121] Step S302, deashing the degreased titanium-aluminum alloy product with a first acidic deashing agent, and cleaning the deashed titanium-aluminum alloy product with clean water; wherein the first acidic deashing agent is selected from nitric acid;

[0122] Step S303, using alkaline solution to perform alkaline washing on the titanium-aluminum alloy product after ash removal to remove the natural oxide film on the surface of the titanium-aluminum alloy product, and then washing it with clean water to obtain the titanium-aluminum alloy product after alkaline washing; wherein the alkaline solution is selected from a sodium hydroxide solution with a mass fraction of 4% (the sodium hydroxide solution is prepared by sodium hydroxide and water, wherein the mass concentration of sodium hydroxide in the sodium hydroxide solution is 4%);

[0123] Step S304, deashing the titanium-aluminum alloy product after alkali washing with a second acidic deashing agent, and cleaning it with clean water to obtain the washed titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from nitric acid.

[0124] like Figure 3 As shown, in some embodiments, the titanium-aluminum alloy product to be tested includes a titanium alloy part 21 and an aluminum alloy part 22 , and the titanium alloy part 21 is connected to the aluminum alloy part 22 .

[0125] In some embodiments, the titanium alloy portion 21 has a connection hole 23 (such as Figure 4 As shown), the aluminum alloy part 22 is connected to the connecting hole 23; the connecting hole 23 is a through hole.

[0126] In some embodiments, the titanium-aluminum alloy product to be tested is a housing of an electronic device.

[0127] In some embodiments, the titanium alloy part 21 is a frame of a housing of an electronic device; and the aluminum alloy part 22 is a middle plate of a housing of an electronic device.

[0128] <Preparation Example of Titanium Alloy Anodic Oxidation Solution Base Liquid>

[0129] Preparation Examples 1-3

[0130] According to the formula shown in Table 1, the titanium alloy anodizing solution base solutions corresponding to Examples 1-3 were prepared respectively according to the preparation method S1000 described below. The preparation method S1000 includes the following steps:

[0131] Step S1001, taking a first container, dissolving sodium metavanadate in the first container with water to obtain a sodium metavanadate aqueous solution;

[0132] Step S1002, add phosphoric acid solution, glycerol, and the sodium metavanadate aqueous solution to the first container in sequence, stir evenly, and finally add sulfuric acid solution and stir evenly to obtain a titanium alloy anodizing solution base liquid; wherein the sum of the weight parts of the sodium metavanadate, the phosphoric acid solution, the glycerol, the sulfuric acid solution and the water is 100 parts; the sulfuric acid solution is a concentrated sulfuric acid solution with a mass fraction of 98%, and the phosphoric acid solution is a phosphoric acid solution with a mass fraction of 85%.

[0133] Table 1. Formulations of Examples 1-3

[0134]

[0135] <Preparation Example of Titanium Alloy Anodic Oxidation Solution>

[0136] Preparation Example 4

[0137] Take the titanium alloy anodizing solution base liquid obtained in Example 1, mix it with water in a tank, open a tank according to a concentration of 200 g / L, adjust the concentration of sulfuric acid to 70 g / L, and obtain the titanium alloy anodizing solution; that is, the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200 g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 70 g / L.

[0138] Preparation Example 5

[0139] Take the titanium alloy anodizing solution base liquid obtained in Example 2, mix it with water in a tank, open a tank according to a concentration of 250 g / L, adjust the concentration of sulfuric acid to 90 g / L, and obtain the titanium alloy anodizing solution; that is, the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 250 g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 90 g / L.

[0140] Preparation Example 6

[0141] Take the titanium alloy anodizing solution base liquid obtained in Example 3, mix it with water in a tank, open the tank according to the concentration of 300 g / L, adjust the concentration of sulfuric acid to 110 g / L, and obtain the titanium alloy anodizing solution; that is, the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 300 g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 110 g / L.

[0142] <Preparation Example of Aluminum Alloy Anodizing Solution Base Liquid>

[0143] Preparation Examples 7-9

[0144] According to the formula shown in Table 2, the aluminum alloy anodizing solution base solution corresponding to Examples 7-9 was prepared according to the preparation method S2000 described below. The preparation method S2000 includes the following steps:

[0145] Step S2001, taking a second container, and adding water into the second container;

[0146] Step S2002, adding tartaric acid to the water in the second container and stirring evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution;

[0147] Step S2003, adding sodium metavanadate to the tartaric acid aqueous solution in the second container and stirring evenly to dissolve the sodium metavanadate to obtain a first mixed solution;

[0148] Step S2004, adding sodium molybdate to the first mixed solution in the second container again and stirring evenly to dissolve the sodium molybdate to obtain a second mixed solution;

[0149] Step S2005, finally adding sulfuric acid solution to the second mixed solution in the second container, stirring evenly, to obtain an aluminum alloy anodizing solution base liquid; wherein the sulfuric acid solution is a concentrated sulfuric acid solution with a mass fraction of 98%.

[0150] Table 2, formulations of Examples 7-9

[0151]

[0152] <Preparation Example of Aluminum Alloy Anodizing Solution>

[0153] Example 10

[0154] Take the aluminum alloy anodizing solution base liquid of Example 9, mix it with water in a tank, cut the tank at a concentration of 200 g / L, adjust the sulfuric acid concentration to 65 g / L, and obtain the titanium alloy anodizing solution; that is, the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200 g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 65 g / L.

[0155] Preparation Example 11

[0156] Take the aluminum alloy anodizing solution base liquid of Example 11, mix it with water in a tank, open the tank according to 250g / L, and adjust the sulfuric acid concentration to 70g / L; obtain the aluminum alloy anodizing solution; that is, the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 250g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 70g / L. .

[0157] Preparation Example 12

[0158] Take the aluminum alloy anodizing solution base liquid of Example 12, mix it with water in a tank, open a tank according to 300g / L, and adjust the sulfuric acid concentration to 75g / L; obtain aluminum alloy anodizing solution; that is, the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 300g / L, and the mass concentration of sulfuric acid in the titanium alloy anodizing solution is 75g / L.

[0159] <Comparative Example>

[0160] Comparative Example 1

[0161] Take a concentrated sulfuric acid solution with a mass concentration of 98%, mix it with water in a tank, and open a tank at 200g / L of sulfuric acid to obtain a conventional aluminum sulfuric acid anodizing solution; wherein the concentration of sulfuric acid in the titanium anodizing solution is 200g / L.

[0162] Comparative Example 2

[0163] Take tartaric acid and concentrated sulfuric acid solution with a mass concentration of 98%, mix them, then mix the mixture with water in a tank, and open the tank at a concentration of 70g / L sulfuric acid and 60g / L tartaric acid to obtain a conventional titanium anodizing solution; wherein the concentration of sulfuric acid in the titanium anodizing solution is 70g / L, and the concentration of tartaric acid in the titanium anodizing solution is 60g / L. .

[0164] <Anodizing Application Examples>

[0165] Take the titanium-aluminum alloy product to be tested and perform anodizing treatment, as shown in the following application examples 1 to 3 and application control examples 1 to 3; wherein the titanium-aluminum alloy product includes a titanium alloy frame and an aluminum alloy middle plate, and the titanium alloy material of the titanium alloy frame is composed of 6% aluminum, 4% vanadium and 90% titanium; the aluminum alloy material of the aluminum alloy middle plate is 7 series aluminum alloy, and the composition is shown in Table 3 below.

[0166] Table 3

[0167]

[0168] Application Example 1

[0169] Step S3001, taking the titanium-aluminum alloy product to be tested, cleaning the oil stains on the surface of the titanium-aluminum alloy product with an acidic degreasing agent and then cleaning with clean water to obtain a degreased titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from a sulfuric acid solution with a mass concentration of 20%;

[0170] Step S3002, deashing the degreased titanium-aluminum alloy product with a first acidic deashing agent, and cleaning the deashed titanium-aluminum alloy product with clean water; wherein the first acidic deashing agent is selected from nitric acid;

[0171] Step S3003, using alkaline solution to perform alkaline washing on the titanium-aluminum alloy product after ash removal to remove the natural oxide film on the surface of the titanium-aluminum alloy product, and then washing it with clean water to obtain an alkaline-washed titanium-aluminum alloy product; wherein the alkaline solution is selected from a sodium hydroxide solution with a mass fraction of 4%;

[0172] Step S3004, deashing the titanium-aluminum alloy product after alkali washing with a second acidic deashing agent, and washing it with clean water to obtain a washed titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from nitric acid;

[0173] Step S3005, placing the cleaned titanium-aluminum alloy product into a titanium alloy anodizing solution for anodizing treatment to obtain a titanium anodized product; wherein the titanium alloy anodizing parameters include: (24)V*(14)℃*(2)min; the titanium alloy anodizing solution is selected from the titanium alloy anodizing solution prepared in Example 4;

[0174] Step S3006, clean the titanium anodized product with pure water to obtain a cleaned titanium anodized product;

[0175] Step S3007, placing the cleaned titanium anodized product into an aluminum alloy anodizing solution to perform anodizing treatment on the aluminum alloy to obtain a titanium aluminum anodized product; wherein the aluminum alloy anodizing parameters include: (19)V*(19)℃*(40)min; the aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Example 10;

[0176] Step S3008, anodizing post-treatment: After step S3007, the titanium aluminum anodized product is subjected to pre-sealing and sealing treatments, and is first cleaned and dried with pure water to obtain an anodized product after sealing, and then the anodized product after sealing is subjected to wire drawing, polishing, a second cleaning, CNC processing of titanium frame chamfering (using a CNC milling cutter to process the chamfer of the titanium frame), a third cleaning and PVD (physical vapor deposition process) treatment in sequence to obtain an anodized titanium aluminum alloy product.

[0177] Application Example 2

[0178] It is basically the same as Experimental Example 1, except that

[0179] The titanium alloy anodizing parameters include: (26)V*(16)℃*(3)min, the titanium alloy anodizing solution is selected from the titanium alloy anodizing solution prepared in Example 5;

[0180] The aluminum alloy anodizing parameters include: (21)V*(21)℃*(45)min, and the aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Example 11.

[0181] Application Example 3

[0182] It is basically the same as Experimental Example 1, except that

[0183] The titanium alloy anodizing parameters include: (28)V*(18)℃*(4)min, the titanium alloy anodizing solution is selected from the titanium alloy anodizing solution prepared in Example 6,

[0184] The aluminum alloy anodizing parameters include: (23)V*(23)℃*(50)min, and the aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Example 12.

[0185] Application Example 1

[0186] It is basically the same as Experimental Example 1, except that

[0187] The titanium-compound anodizing solution is selected from the titanium-compound anodizing solution prepared in Comparative Example 1.

[0188] The aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Comparative Example 2.

[0189] Application Example 2

[0190] It is basically the same as Experimental Example 2, except that:

[0191] The titanium-compound anodizing solution is selected from the titanium-compound anodizing solution prepared in Comparative Example 1.

[0192] The aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Comparative Example 2.

[0193] Application Example 3

[0194] It is basically the same as Experimental Example 3, except that:

[0195] The titanium-compound anodizing solution is selected from the titanium-compound anodizing solution prepared in Comparative Example 1.

[0196] The aluminum alloy anodizing solution is selected from the aluminum alloy anodizing solution prepared in Comparative Example 2.

[0197] <Experimental example>

[0198] The anodized titanium aluminum alloy products obtained in the aforementioned application examples 1 to 3 and the application control examples 1 to 3 were taken and performance tests were performed. The experimental results are shown in Table 4.

[0199] Table 4. Results of experimental examples

[0200]

[0201] It can be seen from Table 4 that the titanium alloy anodizing solution and the aluminum alloy anodizing solution of the embodiments of the present application can prevent the aluminum alloy anode film from cracking and prevent the titanium alloy from fading after the titanium-aluminum alloy is anodized, thereby effectively overcoming the defects pointed out in the background technology.

[0202] The above specific embodiments have been described in detail for the present invention, but these do not constitute limitations on the present invention. The protection scope of the present invention is not limited to the above embodiments, and any equivalent modifications or changes made by ordinary technicians in the field based on the content disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A combined solution for anodizing titanium-aluminum alloy products, characterized in that: include: Titanium alloy anodizing solution and aluminum-titanium alloy anodizing solution; among which, The titanium alloy anodizing solution comprises a titanium alloy anodizing solution base liquid and water; wherein the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L; wherein the preparation method of the titanium alloy anodizing solution base liquid comprises: dissolving a first sodium metavanadate with a first water to obtain a sodium metavanadate aqueous solution; mixing a phosphoric acid solution, glycerol, and the sodium metavanadate aqueous solution, stirring evenly, adding a first sulfuric acid solution, stirring evenly, to obtain a titanium alloy anodizing solution base liquid; wherein the sum of the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water is 100 parts, and the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerol, the first sulfuric acid solution, and the first water are 0.2-0.4 parts, 60-70 parts, 0.5-1.2 parts, 3-7 parts, and the remainder, respectively; The aluminum alloy anodizing solution comprises taking an aluminum alloy anodizing solution base liquid for cleaning; wherein the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300 g / L; wherein the preparation method of the aluminum alloy anodizing solution base liquid comprises: taking a second water, adding tartaric acid to the second water and stirring evenly to dissolve the tartaric acid to obtain a tartaric acid aqueous solution; adding a second sodium metavanadate to the tartaric acid aqueous solution and stirring evenly to dissolve the sodium metavanadate to obtain a first mixed solution; adding a second sodium metavanadate to the first mixed solution Sodium molybdate is added and stirred evenly to dissolve the sodium molybdate to obtain a second mixed solution; a second sulfuric acid solution is added to the second mixed solution, and the mixture is stirred evenly to obtain an aluminum alloy anodizing solution base liquid; wherein the sum of the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water is 100 parts, and the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water are 6-9 parts, 0.5-1.0 parts, 0.5-1.0 parts, 23-27 parts and the remainder, respectively.

2. The combined liquid for anodizing a titanium-aluminum alloy product according to claim 1, characterized in that: The first sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; the second sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; The phosphoric acid solution is selected from a phosphoric acid solution with a mass fraction of 85%.

3. A method for anodizing a titanium-aluminum alloy product, characterized in that: include: The cleaned titanium-aluminum alloy product is placed in a titanium alloy anodizing solution for anodizing the titanium alloy to obtain a titanium anodized product; wherein the voltage of the titanium alloy anodizing treatment is between 24 and 28 volts, the temperature is between 14 and 18°C, and the time is between 2 and 4 minutes; the titanium alloy anodizing solution comprises a titanium alloy anodizing solution base liquid and water; wherein the mass concentration of the titanium alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300 g / L; wherein the preparation method of the titanium alloy anodizing solution base liquid comprises: using a first water-soluble Decomposing a first sodium metavanadate to obtain a sodium metavanadate aqueous solution; mixing a phosphoric acid solution, glycerin, and the sodium metavanadate aqueous solution, stirring evenly, adding a first sulfuric acid solution, stirring evenly, and obtaining a titanium alloy anodizing solution base liquid; wherein the sum of the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerin, the first sulfuric acid solution, and the first water is 100 parts, and the weight parts of the first sodium metavanadate, the phosphoric acid solution, the glycerin, the first sulfuric acid solution, and the first water are 0.2-0.4 parts, 60-70 parts, 0.5-1.2 parts, 3-7 parts, and the remainder, respectively; washing the titanium anodized product with water to obtain a washed titanium anodized product; The cleaned titanium anodized product is placed in an aluminum alloy anodizing solution to perform anodizing treatment on the aluminum alloy to obtain a titanium aluminum anodized product; wherein the voltage of the anodizing treatment of the aluminum alloy is between 19 and 23 volts, the temperature is between 19 and 23°C, and the time is between 40 and 50 minutes; wherein the aluminum alloy anodizing solution comprises an aluminum alloy anodizing solution base liquid and water; wherein the mass concentration of the aluminum alloy anodizing solution base liquid in the titanium alloy anodizing solution is 200-300g / L; wherein the method for preparing the aluminum alloy anodizing solution base liquid comprises: taking a second water, adding tartaric acid to the second water and stirring evenly to dissolve the tartaric acid, and obtaining a tartaric acid aqueous solution ; Add a second sodium metavanadate to the tartaric acid aqueous solution and stir evenly to dissolve the sodium metavanadate to obtain a first mixed solution; add sodium molybdate to the first mixed solution and stir evenly to dissolve the sodium molybdate to obtain a second mixed solution; add a second sulfuric acid solution to the second mixed solution and stir evenly to obtain an aluminum alloy anodizing solution base liquid; wherein the sum of the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water is 100 parts, and the weight parts of the second sulfuric acid solution, the sodium molybdate, the second sodium metavanadate, the tartaric acid and the second water are 6-9 parts, 0.5-1.0 parts, 0.5-1.0 parts, 23-27 parts and the remainder, respectively.

4. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: The mass concentration of sulfuric acid in the titanium alloy anodizing solution is 70-110 g / L, and the mass concentration of sulfuric acid in the aluminum alloy anodizing solution is 65-75 g / L; The method for anodizing a titanium-aluminum alloy product further comprises: performing anodizing post-treatment on the titanium-aluminum anodized product to obtain an anodized titanium-aluminum alloy product; The anodized titanium-aluminum product is subjected to anodizing post-treatment to obtain an anodized titanium-aluminum alloy product, comprising: The titanium-aluminum anodized product is subjected to pre-sealing and sealing treatments, and is first cleaned and dried with pure water to obtain a sealed anodized product; Then, the sealed anodized product is subjected to wire drawing, polishing, second cleaning, CNC processing of titanium frame chamfering, third cleaning and PVD treatment in sequence to obtain an anodized titanium aluminum alloy product.

5. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: Also includes: Take the titanium-aluminum alloy product to be tested, clean the oil stains on the surface of the titanium-aluminum alloy product with an acidic degreasing agent and wash it with clean water to obtain the degreased titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from a sulfuric acid solution with a mass concentration of 20%; Deashing the degreased titanium-aluminum alloy product with a first acidic deashing agent, and cleaning the deashed titanium-aluminum alloy product with clean water; wherein the first acidic deashing agent is selected from nitric acid; The titanium-aluminum alloy product after ash removal is subjected to alkali washing treatment with alkali solution to remove the natural oxide film on the surface of the titanium-aluminum alloy product, and then cleaned with clean water to obtain the titanium-aluminum alloy product after alkali washing; wherein the alkali solution is selected from a sodium hydroxide solution with a mass fraction of 4%; The titanium-aluminum alloy product after alkali washing is deashed with a second acidic deashing agent and cleaned with clean water to obtain the cleaned titanium-aluminum alloy product; wherein the second acidic deashing agent is selected from nitric acid.

6. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: The first sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; the second sulfuric acid solution is selected from a sulfuric acid solution with a mass fraction of 98%; The phosphoric acid solution is selected from a phosphoric acid solution with a mass fraction of 85%.

7. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: The titanium-aluminum alloy product includes a titanium alloy portion and an aluminum alloy portion, wherein the titanium alloy portion is connected to the aluminum alloy portion.

8. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: The titanium alloy part has a connecting hole, and the aluminum alloy part is connected in the connecting hole.

9. The method for anodizing a titanium-aluminum alloy product according to claim 3, characterized in that: The connecting hole is a through hole.

10. Anodized alloy product, characterized in that A titanium-aluminum anodized product obtained by the method for anodizing a titanium-aluminum alloy product according to claim 3, or an anodized titanium-aluminum alloy product obtained by the method for anodizing a titanium-aluminum alloy product according to claim 4.

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