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Method for coloring magnesium-aluminum alloy surface

A magnesium-aluminum alloy, surface coloring technology, applied in anodizing and other directions, can solve the problems of unsatisfactory color, weak coloring process, large difference, etc.

Inactive Publication Date: 2015-03-11
WUXI HONGSHENG ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The coloring process of the surface of the aluminum-magnesium alloy substrate is a relatively traditional process, but the coloring process of the existing process generally has a large difference from the standard color, which will cause customers to often have different coloring processes when ordering according to the standard color card. Strong, causing the ordered color to be unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for coloring the surface of a magnesium-aluminum alloy, comprising the steps of:

[0021] (1) Use mechanical grinding to remove the oxide film, then wash and dry;

[0022] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 70°C for 3 minutes; the degreasing solution includes sodium phosphate, sodium hydroxide and sodium silicate;

[0023] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 50°C for 5 minutes. The alkaline etching solution includes sodium hydroxide, NaF, sodium nitrate, scaling inhibitors, gluconate, Enanthate, tartrate, gum arabic, dextrin, polyphosphate, detergent;

[0024] (4) Put the alkali-etched magnesium-aluminum alloy sheet into a polishing solution at a temperature of 100°C for 6 minutes. The polishing solution is a 400g / L nitric acid solution, and soak at room temperature for 4 minutes;

[0025] (5) Perform sulfuric acid anodization...

Embodiment 2

[0028] A method for coloring the surface of a magnesium-aluminum alloy, comprising the steps of:

[0029] (1) Use mechanical grinding to remove the oxide film, then wash and dry;

[0030] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 75°C for 3 minutes; the degreasing solution includes sodium phosphate, sodium hydroxide and sodium silicate;

[0031] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 70°C for 5 minutes. The alkaline etching solution includes sodium hydroxide, NaF, sodium nitrate, scaling inhibitors, gluconate, Enanthate, tartrate, gum arabic, dextrin, polyphosphate, detergent;

[0032] (4) Put the alkali-etched magnesium-aluminum alloy sheet into a polishing solution at a temperature of 120°C for 4 minutes, the polishing solution is a 350gg / L nitric acid solution, and soak at room temperature for 6 minutes;

[0033] (5) Perform sulfuric acid anodizatio...

Embodiment 3

[0036] A method for coloring the surface of a magnesium-aluminum alloy, comprising the steps of:

[0037] (1) Use mechanical grinding to remove the oxide film, then wash and dry;

[0038] (2) Put the polished magnesium-aluminum alloy sheet into a degreasing solution at a temperature of 72°C for 4 minutes; the degreasing solution includes sodium phosphate, sodium hydroxide and sodium silicate;

[0039] (3) Put the degreased magnesium-aluminum alloy sheet into an alkaline etching solution at a temperature of 60°C for 4 minutes. The alkaline etching solution includes sodium hydroxide, NaF, sodium nitrate, scaling inhibitors, gluconate, Enanthate, tartrate, gum arabic, dextrin, polyphosphate, detergent;

[0040] (4) Put the alkali-etched magnesium-aluminum alloy sheet into a polishing solution at a temperature of 110°C for 5 minutes. The polishing solution is a 375g / L nitric acid solution, and soak at room temperature for 5 minutes;

[0041] (5) Perform sulfuric acid anodization...

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PUM

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Abstract

The invention provides a method for coloring a magnesium-aluminum alloy surface. The conditions for coloring a yellow color through electroplating are as follows: a KMnO4 solution with a concentration of 30 g / L is adopted, the temperature is 20 to 25 DEG C, the voltage is 15 V, and the time is 5 to 8 minutes. The conditions for coloring a red color through electroplating are as follows: a CuSO4 solution with a concentration of 30 g / L is adopted, the temperature is 20 to 25 DEG C, the voltage is 15 V, and the time is 5 to 8 minutes. The conditions for coloring a purple color through electroplating are as follows: a mixed solution, which is prepared by mixing a CuSO4 solution with a concentration of 40 g / L and a H2SO4 solution according to a volume ratio of 1:1, with a concentration of 30 g / L is adopted, the temperature is 20 to 25 DEG C, the voltage is 15 V, and the time is 3 to 6 minutes. The provided method is simple, the colors electroplated on the alloy surface are more next to the standard colors, and the coloring quality is improved.

Description

technical field [0001] The invention relates to a magnesium-aluminum alloy surface coloring method, which belongs to the technical field of surface treatment of aluminum-magnesium alloy substrates. Background technique [0002] The coloring process of the surface of the aluminum-magnesium alloy substrate is a relatively traditional process, but the coloring process of the existing process generally has a large difference from the standard color, which will cause customers to often have different coloring processes when ordering according to the standard color card. Strong, causing the ordered color to be unsatisfactory. Therefore, the surface coloring process of aluminum-magnesium alloy substrates should be improved. Contents of the invention [0003] The invention provides a method for coloring the surface of magnesium-aluminum alloy, which is simple and makes the color closer to the standard color. [0004] In order to solve the above technical problems, the present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/14C25D11/16C25D11/30
CPCC25D11/14C25D11/16C25D11/30
Inventor 王洪初
Owner WUXI HONGSHENG ALUMINUM IND
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