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Black sulphuric acid anodizing method of aluminum alloys

A technology of black sulfuric acid and treatment method, applied in anodizing and other directions, can solve problems such as increasing production cost and affecting production progress.

Inactive Publication Date: 2015-09-02
HARBIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This seriously affects the production schedule and also increases the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] A kind of black sulfuric acid anodizing treatment method of aluminum alloy, comprises the following steps:

[0024] Step 1, organic solvent degreasing and chemical degreasing;

[0025] Step 2, wash with water and carry out water film inspection;

[0026] Step 3, chromium sulfuric acid washing;

[0027] Step 4, washing with water;

[0028] Step five, sulfuric acid anodization

[0029] To prepare the sulfuric acid anodizing solution:

[0030] Sulfuric acid 200g / L~220g / L

[0031] Aluminum sulfate 8g / L~12g / L

[0032] Deionized water

[0033] Control the temperature within the range of 15°C to 20°C, immerse the aluminum alloy specimen in the sulfuric acid anodization solution for 60min to 80min, apply a voltage of 12V to 20V, and a current density of 1A / dm 2 ~1.5A / dm 2 ;

[0034] Step six, washing with water;

[0035] Step 7. Black dyeing

[0036] Prepare a black staining solution in which:

[0037] Acid black ATT 50g / L~60g / L

[0038] Deionized water

[0039] A...

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PUM

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Abstract

The invention belongs to surface treatment of aluminum alloys, and in particular relates to a black sulphuric acid anodizing method of aluminum alloys. In the prior art, the problems that a local part on the surface of a part cannot be dyed and the dyed part becomes dappled in the event of dyeing black are caused continuously; faults recur after reworking for several times; therefore, the production schedule is seriously influenced; and furthermore, the production cost is also increased. To increase the black dyeing production capability, aiming at the technical bottleneck problem, the invention provides the corresponding method.

Description

technical field [0001] The invention belongs to the surface treatment of aluminum alloys, in particular to a black sulfuric acid anodization treatment method for aluminum alloys. Background technique [0002] So far, the problem that the part surface cannot be partially dyed, and the color of the dyed part becomes blurred, has occurred continuously during the black dyeing process. After several reworks, the fault reappeared. This seriously affects the production schedule and also increases the production cost. In order to improve the production capacity of black dyeing, it is urgent to find a solution to this technical bottleneck problem. Contents of the invention [0003] The present invention proposes a black sulfuric acid anodizing treatment method of aluminum alloy, comprising the following steps: [0004] Step 1, organic solvent degreasing and chemical degreasing; [0005] Step 2, wash with water and carry out water film inspection; [0006] Step 3, chromium sulf...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/18
Inventor 陈桂洪万杰毛英坤周宇
Owner HARBIN