Aluminum alloy porcelain anodizing process

Abstract

The present invention relates to an aluminum alloy porcelain anodizing process, the process comprising: a primary anodizing treatment; the aluminum alloy after pretreatment is put into a first anodizing solution for anodizing; the first anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L boric acid, heat treatment, the aluminum alloy after the primary anodizing treatment is heat treated at 300-400 ° C; secondary anodizing treatment, the aluminum alloy after the heat treatment is put into a second anodizing solution for anodizing; the second anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L boric acid. The present invention manufactures two different apertures in the oxide film layer on the surface of the aluminum alloy, so that the scattering of light is closer to the ceramic effect. Since a small amount of uniform apertures are first manufactured on the surface, the film layer obtained by the method of the present invention is smoother than that on the original aluminum alloy surface.

Description

Technical Field

[0001] The invention relates to an aluminum alloy porcelain anodic oxidation process. Background Art

[0002] In the field of aluminum surface treatment, a special treatment method can be used to obtain a ceramic texture. The film obtained from the mixed acid solution of chromic acid and boric acid is a ceramic oxide film, which is opaque grayish white and looks similar to enamel. However, when the colored film is dyed, the ceramic texture is not strong and the surface is uneven. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the prior art and provide an aluminum alloy porcelain anodizing process, the process comprising the following steps:

[0004] Degreasing

[0005] Place the aluminum alloy in a degreasing tank at a temperature of 30-50°C for degreasing and degreasing. After completion, wash with water until the surface of the aluminum alloy is clean.

[0006] One-time anodizing treatment;

[0007] The pre-treated aluminum alloy is put into a first anodizing solution for anodizing; the first anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L borate;

[0008] Heat Treatment

[0009] The aluminum alloy that has undergone the primary anodizing treatment is heat treated at 300-400°C;

[0010] Secondary anodizing treatment

[0011] The heat-treated aluminum alloy is placed in a second anodizing solution for anodizing; the second anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L boric acid;

[0012] Dyeing treatment

[0013] After anodizing, the aluminum alloy is ultrasonically treated, washed with water, and then placed in an organic dye tank for dyeing; sealing treatment

[0014] The colored aluminum alloy is placed in a closed tank liquid at a temperature of 85-95°C, and then the water stains on the surface of the aluminum alloy are blown dry to obtain the treated aluminum alloy.

[0015] The electrolysis parameters of the primary anodizing treatment are: voltage of 15-25V, time of 5-10min, and temperature of room temperature.

[0016] The first anodizing solution includes 50-150 g / L sulfuric acid, 20-40 g / L oxalic acid, 20-40 g / L boric acid and 20-40 g / L borate ester.

[0017] The electrolysis parameters of the secondary anodizing treatment are: temperature 30-35 degrees Celsius, voltage 15-25V, time 30-60min, and temperature is room temperature.

[0018] The second anodizing solution includes 50-150 g / L sulfuric acid, 20-40 g / L oxalic acid, 20-40 g / L boric acid and 20-40 g / L citric acid.

[0019] The dyeing parameters of the dyeing treatment are: temperature 22° C., dyeing time 3 min.

[0020] The components of the closed tank solution are 20-50 g / L of silicate, 10-30 g / L of surfactant, 20-60 g / L of methanol and 0.1-2 g / L of sodium polystyrene sulfonate.

[0021] The surfactant is selected from one or more of polyoxyethylene alkyl ether sulfate, linear alkyl benzene sulfonate, alkyl sulfate, and alcohol sulfate.

[0022] The silicate is selected from one or both of sodium silicate and potassium silicate.

[0023] The borate ester is selected from one or more of trimethyl borate, triethyl borate and triethanolamine borate.

[0024] The present invention uses borate to produce two different apertures in the oxide film layer on the aluminum alloy surface, so that the light scattering is closer to the ceramic effect. Since a small amount of uniform apertures are first produced on the surface, the film layer obtained by the method of the present invention is smoother than that on the original aluminum alloy surface.

[0025] The above and other features, aspects and advantages of the present application will be more readily understood with reference to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a photo of the workpiece experiment in Example 1.

[0027] Figure 2 This is the experimental photo of the workpiece of Comparative Example 1. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in combination with the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0030] An aluminum alloy porcelain anodizing process, the process comprising the following steps:

[0031] Degreasing

[0032] Place the aluminum alloy in a degreasing tank at a temperature of 30-50°C for degreasing and degreasing. After completion, wash with water until the surface of the aluminum alloy is clean.

[0033] One-time anodizing treatment;

[0034] The aluminum alloy after pretreatment is put into the first anodizing solution for anodizing; the electrolytic parameters of the first anodizing treatment are: voltage of 15-25V, time of 5-10min, and temperature of room temperature. The first anodizing solution includes 50-150g / L sulfuric acid, 20-40g / L oxalic acid, 20-40g / L boric acid and 20-40g / L boric acid ester. The boric acid ester is selected from one or more of trimethyl borate, triethyl borate, and triethanolamine borate.

[0035] Heat Treatment

[0036] The aluminum alloy that has undergone the primary anodizing treatment is heat treated at 300-400°C;

[0037] Secondary anodizing treatment

[0038] The heat-treated aluminum alloy is placed in a second anodizing solution for anodizing; the electrolytic parameters of the secondary anodizing treatment are: temperature 30-35 degrees Celsius, voltage 15-25V, time 30-60min, and temperature is room temperature. The second anodizing solution includes 50-150g / L sulfuric acid, 20-40g / L oxalic acid, 20-40g / L boric acid, and 20-40g / L citric acid.

[0039] Dyeing

[0040] After anodizing, the aluminum alloy was ultrasonically treated, washed with water, and then put into an organic dye tank for dyeing; a special gold dye from Guangzhou Delta Technology Co., Ltd. was used. The dyeing parameters of the dyeing treatment were: temperature 22°C, dyeing time 3 minutes.

[0041] Closed Processing

[0042] The aluminum alloy after coloring treatment is placed in a closed tank liquid with a temperature of 85-95°C, and then the water stains on the surface of the aluminum alloy are blown dry to obtain the treated aluminum alloy. The components of the closed tank liquid are 20-50g / L silicate, 10-30g / L surfactant, 20-60g / L methanol and 0.1-2g / L sodium polystyrene sulfonate. The surfactant is selected from one or more of polyoxyethylene alkyl ether sulfate, linear alkyl benzene sulfonate, alkyl sulfate, and alcohol sulfate. The silicate is selected from one or two of sodium silicate and potassium silicate.

[0043] Example 1

[0044] The aluminum alloy was treated by the aforementioned method, and the electrolytic parameters of the first anodizing treatment were: voltage of 20V, time of 8min, and temperature of room temperature. The first anodizing solution included 100g / L sulfuric acid, 30g / L oxalic acid, 30g / L boric acid, and 30g / L triethyl borate. Heat treatment was carried out at about 350°C, and the electrolytic parameters of the secondary anodizing treatment were: temperature of 30-35 degrees Celsius, voltage of 20V, time of 60min, and temperature of room temperature. The second anodizing solution included 100g / L sulfuric acid, 30g / L oxalic acid, 30g / L boric acid, and 30g / L citric acid. A special gold dye from Guangzhou Delta Technology Co., Ltd. was used. The dyeing parameters of the dyeing treatment were: temperature of 22°C, and dyeing time of 3min. The experimental results are as follows Figure 1 .

[0045] Comparative Example 1

[0046] The aluminum alloy was treated by the aforementioned method, but heat treatment was not used, and a single anodizing treatment was used. The electrolytic parameters of the anodizing treatment were: temperature 30-35 degrees Celsius, voltage 20V, time 60min, and temperature at room temperature. The second anodizing solution included 100g / L sulfuric acid, 30g / L oxalic acid, 30g / L boric acid, and 30g / L citric acid. The special gold dye of Guangzhou Delta Technology Co., Ltd. was used. The dyeing parameters of the dyeing treatment were: temperature 22°C, dyeing time 3min. The experimental results are as follows Figure 2 .

[0047] pass Figure 1 and Figure 2 The comparison found that Figure 1 Smoother and less whitish in color.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This description method 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 embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A process for anodizing aluminum alloy porcelain, characterized in that: The process comprises the following steps: Degreasing Place the aluminum alloy in a degreasing tank at a temperature of 30-50°C for degreasing and degreasing. After completion, wash with water until the surface of the aluminum alloy is clean. One-time anodizing treatment; The pre-treated aluminum alloy is put into a first anodizing solution for anodizing; the first anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L borate; Heat Treatment The aluminum alloy that has undergone the primary anodizing treatment is heat treated at 300-400°C; Secondary anodizing treatment The heat-treated aluminum alloy is placed in a second anodizing solution for anodizing; the second anodizing solution comprises 50-150 g / L sulfuric acid and 20-40 g / L boric acid; Dyeing After anodizing, the aluminum alloy is ultrasonically treated, washed with water, and then placed in an organic dye tank for dyeing; Closed Processing The colored aluminum alloy is placed in a closed tank liquid at a temperature of 85-95°C, and then the water stains on the surface of the aluminum alloy are blown dry to obtain the treated aluminum alloy.

2. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The electrolysis parameters of the primary anodizing treatment are: voltage of 15-25V, time of 5-10min, and temperature of room temperature.

3. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The first anodizing solution includes 50-150 g / L sulfuric acid, 20-40 g / L oxalic acid, 20-40 g / L boric acid and 20-40 g / L borate ester.

4. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The electrolysis parameters of the secondary anodizing treatment are: temperature 30-35 degrees Celsius, voltage 15-25V, and time 30-60min.

5. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The second anodizing solution includes 50-150 g / L sulfuric acid, 20-40 g / L oxalic acid, 20-40 g / L boric acid and 20-40 g / L citric acid.

6. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The dyeing parameters of the dyeing treatment are: temperature 22° C., dyeing time 3 min.

7. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The components of the closed tank solution are 20-50 g / L of silicate, 10-30 g / L of surfactant, 20-60 g / L of methanol and 0.1-2 g / L of sodium polystyrene sulfonate.

8. The aluminum alloy porcelain anodizing process according to claim 7, characterized in that: The surfactant is selected from one or more of polyoxyethylene alkyl ether sulfate, linear alkyl benzene sulfonate, alkyl sulfate, and alcohol sulfate.

9. The aluminum alloy porcelain anodizing process according to claim 7, characterized in that: The silicate is selected from one or both of sodium silicate and potassium silicate.

10. The aluminum alloy porcelain anodizing process according to claim 1, characterized in that: The borate ester is selected from one or more of trimethyl borate, triethyl borate and triethanolamine borate.

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