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Hard anodization method of mixed acid of copper aluminium alloy

A hard anodic oxidation, copper-aluminum alloy technology, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve problems such as production difficulty

Active Publication Date: 2012-01-11
WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used hard anodizing is sulfuric acid hard anodizing direct current method, which is generally carried out at low temperature, so it must be equipped with supporting refrigeration equipment and oil-free, preferably cooled compressed air stirring, to bring certain difficulty

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A mixed acid hard anodic oxidation method of copper and aluminum alloys. Aluminum parts are chemically degreased, cleaned, neutralized, cleaned, hard anodized, cleaned, and sealed to obtain a film layer, wherein the electrolyte of hard anodic oxidation The components are as follows: oxalic acid 1g / L, glycerin 1g / L, ascorbic acid 5g / L, benzenesulfonic acid 2g / L; the process parameters of the electrolyte for hard anodic oxidation are as follows: temperature 10°C, voltage: 30V, anode current density: 2.5A / dm 2、 Time: 50min, cathode material: lead plate. The film thickness of this process reaches 50 microns, and the hardness HV is 530.

Embodiment 2

[0016] A mixed acid hard anodic oxidation method of copper and aluminum alloys. Aluminum parts are chemically degreased, cleaned, neutralized, cleaned, hard anodized, cleaned, and sealed to obtain a film layer, wherein the electrolyte of hard anodic oxidation The components are as follows: oxalic acid 2g / L, glycerin 3g / L, ascorbic acid 1g / L, benzenesulfonic acid 3g / L; the process parameters of the hard anodic oxidation electrolyte are as follows: temperature 15°C, voltage: 25V, anode current density: 3.0A / dm 2、 Time: 45min, cathode material: lead plate. The film thickness of this process reaches 48 microns, and the hardness HV is 700.

Embodiment 3

[0018] A mixed acid hard anodic oxidation method of copper and aluminum alloys. Aluminum parts are chemically degreased, cleaned, neutralized, cleaned, hard anodized, cleaned, and sealed to obtain a film layer, wherein the electrolyte of hard anodic oxidation The components are as follows: oxalic acid 5g / L, glycerin 5g / L, ascorbic acid 3g / L, benzenesulfonic acid 1g / L; the process parameters of the electrolyte for hard anodic oxidation are as follows: temperature 13°C, voltage: 25V, anode current density: 3.0A / dm 2、 Time: 40min, cathode material: lead plate. The film thickness of this process reaches 15 microns, and the hardness HV is 620.

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Abstract

A hard anodization method of a mixed acid of copper aluminium alloy; an aluminium workpiece is treated by chemical oil removal, cleaning, neutralization, cleaning, hard anodization, cleaning, and sealing to obtain a film layer, wherein the electrolyte of the hard anodization comprises the following steps: 1-5 g / L of oxalic acid, 1-5 g / L of glycerin, 1-5 g / L of ascorbic acid, and 1-5 g / L of benzenesulfonic acid; the process parameters of the electrolyte of the hard anodization are: a temperature of 10-15 DEG C, a voltage of 25-30 V, an anodic current density of 1.5-2.5 A / dm2, time of 40-50 min; and a cathode material is a lead plate. The film layer thickness of the process reaches 40-50 microns, and the hardness HV is 450-750; the invention is applicable to hard anodization of aluminium alloy with a high copper content.

Description

[0001] technical field [0002] The invention relates to a mixed acid hard anodic oxidation method of copper and aluminum alloys, which belongs to the surface treatment method of aluminum alloys. Background technique [0003] The commonly used hard anodizing is sulfuric acid hard anodizing direct current method, which is generally carried out at low temperature, so it must be equipped with supporting refrigeration equipment and oil-free, preferably cooled compressed air stirring, to bring certain difficulty. The mixed acid hard anodizing AC / DC superposition method is to add an appropriate amount of organic acid to the sulfuric acid or oxalic acid electrolyte, which allows to increase the hard oxidation temperature, facilitate production, reduce costs, and increase the thickness of the film layer. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a mixed-acid hard anodic oxidation method of copper and aluminum allo...

Claims

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Application Information

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IPC IPC(8): C25D11/10
Inventor 谢利荣
Owner WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY