A kind of coloring method of aluminum alloy AC electrolytic deposition of silver and copper

A technology of electrolytic deposition and electrolytic coloring, applied in the direction of anodic oxidation, etc., can solve the problems of poor stability of the coloring solution, achieve long-lasting antibacterial and bactericidal effects, improve corrosion resistance, and simple process

Active Publication Date: 2016-07-27
SHISHI XINGHUO ALUMINUM PROD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the poor stability of the current coloring solution and provide a coloring method for aluminum alloy AC electrolytic deposition of silver and copper. The process is simple, the operation is convenient, the coloring is uniform and stable, and the corrosion resistance of the aluminum alloy is improved. performance, and the antibacterial and bactericidal rate of aluminum alloy reaches 99.0%, and the antibacterial and bactericidal effect lasts for a long time, and the cost of coloring treatment is low

Method used

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  • A kind of coloring method of aluminum alloy AC electrolytic deposition of silver and copper
  • A kind of coloring method of aluminum alloy AC electrolytic deposition of silver and copper
  • A kind of coloring method of aluminum alloy AC electrolytic deposition of silver and copper

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Effect test

Embodiment 1

[0037] After pretreatment such as degreasing, oxide film removal, ash removal, and water washing, the aluminum alloy sheet contains 5g / LAl 2 (SO 4 ) 3 18H 2 O and 170g / LH 2 SO 4 Concentrated solution, electrolysis at 19-21 DEG C and 14V DC voltage for 30 minutes, washing and immersing to remove the surface electrolyte, to obtain an aluminum alloy sheet with a porous oxide film with a thickness of about 15-20 microns.

[0038] with H 2 SO 4 17g / L, AgNO 3 5g / L, CuSO 4 ·5H 2 O1.5g / L, MgSO 4 ·7H 2 O20g / L, glycine 3.2g / L to prepare coloring electrolyte, carry out AC electrolytic coloring on the aluminum alloy sheet at a temperature of 25°C, then wash and soak in water to remove the surface electrolyte, and finally seal with hot water. Table 1 below shows the colors attached to AC electrolytic aluminum alloys at different times and AC voltages.

[0039] Table 1 When CuSO 4 ·5H 2 Influence of AC electrolysis voltage and time on the coloring of aluminum alloy at O1.5g / L ...

Embodiment 2

[0042] After pretreatment such as degreasing, oxide film removal, ash removal, and water washing, the aluminum alloy sheet contains 5g / LAl 2 (SO 4 ) 3 18H 2 O and 170gLH 2 SO 4 Concentrated solution, electrolysis at 19-21 DEG C and 14V DC voltage for 30 minutes, washing and immersing to remove the surface electrolyte, to obtain an aluminum alloy sheet with a porous oxide film with a thickness of about 15-20 microns.

[0043] with H 2 SO 4 17g / L, AgNO 3 5g / L, CuSO 4 ·5H 2 O2.0g / L, MgSO 4 ·7H 2 O20g / L, glycine 3.2g / L to prepare colored electrolyte. Perform AC electrolytic coloring on the aluminum alloy sheet at a temperature of 25°C, then wash and soak to remove the surface electrolyte, and finally seal with hot water. Table 2 below shows the colors attached to AC electrolytic aluminum alloys at different times and voltages.

[0044] Table 2 When CuSO 4 ·5H 2 Influence of Alternating Current Electrolysis Voltage and Time on the Coloring of Aluminum Alloys at O2.0g...

Embodiment 3

[0047] Degreasing, removing oxide film and other pre-treated aluminum alloy sheets containing 5g / LAl 2 (SO 4 ) 3 18H 2 O and 170gLH 2 SO 4 In a solution with a high concentration, use DC electrolysis at 19-21°C and 14V for 30 minutes, wash and soak to remove the surface electrolyte, and obtain a porous oxide film with a thickness of about 15-20 microns.

[0048] with H 2 SO 4 17g / L, AgNO 3 5g / L, CuSO 4 ·5H 2 O2.5g / L, MgSO 4 ·7H 2 O20g / L, glycine 3.2g / L to prepare colored electrolyte. Perform AC electrolytic coloring on the aluminum alloy sheet at a temperature of 25°C, then wash and soak to remove the surface electrolyte, and finally seal with hot water. Table 3 below shows the colors attached to AC electrolytic aluminum alloys at different times and voltages.

[0049] Table 3 When CuSO 4 ·5H 2 Influence of AC electrolysis voltage and time on coloring of aluminum alloy at O2.5g / L

[0050]

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Abstract

The invention provides a method for coloring aluminum alloys by AC electrolytic deposition of silver and copper. The steps are as follows: the aluminum alloy parts after pretreatment such as degreasing and oxide film removal are subjected to direct current electrolysis in a sulfuric acid medium to obtain aluminum alloy parts with porous oxide films; The aluminum alloy parts with porous oxide film are subjected to alternating current electrolysis, and the coloring solution composition and process conditions are as follows: H 2 SO 4 15~20g / L, AgNO 3 4~7g / L, CuSO 4 ·5H 2 O 1.5~2.5g / L, MgSO 4 ·7H 2 O 18~25g / L, complexing agent A 2~7g / L or complexing agent B 5~10g / L; temperature 5~35℃, time 3~7min, voltage 4~7V; finally hot water sealing treatment to obtain aluminum alloy. The invention has simple process, not only uniform and stable coloring, but also improves the corrosion resistance of the aluminum alloy, and the antibacterial and sterilizing rate of the aluminum alloy reaches 99.0%, and the antibacterial and sterilizing effect lasts for a long time, and the coloring treatment cost is low. The coloring solution is very stable without insoluble precipitation after long-term use.

Description

【Technical field】 [0001] The invention relates to a coloring method for aluminum alloy AC electrolytic deposition of silver and copper. 【Background technique】 [0002] Aluminum alloy has low density and high specific strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel. . With the development of society and the improvement of people's living standards, people gradually realize the harm of pathogenic bacteria, thus promoting the development of aluminum alloys with bactericidal and antibacterial functions. As a medical aluminum alloy material, it must not only have excellent corrosion resistance, but also have bactericidal and antibacterial functions. [0003] Aluminum alloy will form a very thin oxide film less than 0.1 micron on its surface under...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/08C25D11/22C25D11/24
Inventor 王森林李瑞陈兴星陈世楠郭焱焱
Owner SHISHI XINGHUO ALUMINUM PROD CO LTD
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