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Porcelain oxidation method of aluminium magnesium alloy

A porcelain oxidation, aluminum-magnesium alloy technology, applied in the direction of anodic oxidation, can solve the problems of too much influence, low hardness, unstable process, etc., and achieve good bonding force, good electrical insulation and corrosion resistance, hardness and The effect of high wear resistance

Inactive 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

Traditionally, the following two methods are generally used: 1. The process of adding oxalic acid to titanium, cobalt, and thorium series is more expensive and unstable; 2. The mixed solution based on chromic acid is cheap, but the hardness of the film is relatively high. Low, too much impact on people and the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The porcelain oxidation method of aluminum-magnesium alloy is characterized in that the aluminum material is mechanically polished, chemically degreased and corroded, cleaned, neutralized, cleaned, chemically oxidized, cleaned, scalded with hot water (50°C), dried with compressed air, After drying, a porcelain film can be formed on the surface of the aluminum material;

[0017] The composition of the oxidation liquid used in the chemical oxidation step is as follows: sulfuric acid 1g / L, oxalic acid 1g / L, boric acid 0.5g / L, nickel sulfate 2g / L, ammonium sulfate 0.5g / L;

[0018] The process parameters used in the chemical oxidation step are as follows: current intensity 0.5A / dm 2 , Temperature: 55°C, time: 40min, voltage: 20v.

[0019] The obtained film is silver-gray, and the film thickness is 15 microns. The bonding force of the film layer is good, the hardness and wear resistance are high, and the heat insulation, electrical insulation and corrosion resistance are goo...

Embodiment 2

[0021] The porcelain oxidation method of aluminum-magnesium alloy is characterized in that the aluminum material is mechanically polished, chemically degreased and corroded, cleaned, neutralized, cleaned, chemically oxidized, cleaned, scalded with hot water (50°C), dried with compressed air, After drying, a porcelain film can be formed on the surface of the aluminum material;

[0022] The composition of the oxidation liquid used in the chemical oxidation step is as follows: sulfuric acid 5g / L, oxalic acid 2g / L, boric acid 0.8g / L, nickel sulfate 3g / L, ammonium sulfate 0.6g / L;

[0023] The process parameters used in the chemical oxidation step are as follows: current intensity 1A / dm 2 , Temperature: 40°C, time: 50min, voltage: 30v.

[0024] The obtained film is silver-gray and has a thickness of 18 microns. The bonding force of the film layers is good, the hardness and wear resistance are high, and the thermal insulation, electrical insulation and corrosion resistance are good....

Embodiment 3

[0026] The porcelain oxidation method of aluminum-magnesium alloy is characterized in that the aluminum material is mechanically polished, chemically degreased and corroded, cleaned, neutralized, cleaned, chemically oxidized, cleaned, scalded with hot water (50°C), dried with compressed air, After drying, a porcelain film can be formed on the surface of the aluminum material;

[0027] The composition of the oxidation liquid used in the chemical oxidation step is as follows: sulfuric acid 10g / L, oxalic acid 5g / L, boric acid 1g / L, nickel sulfate 1g / L, ammonium sulfate 1g / L;

[0028] The process parameters used in the chemical oxidation step are as follows: current intensity 1A / dm 2 , Temperature: 45°C, time: 45min, voltage: 40v.

[0029] The obtained film is silver-gray, and the film thickness is 20 microns. The bonding force of the film layer is good, the hardness and wear resistance are high, and the heat insulation, electrical insulation and corrosion resistance are good.

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Abstract

The invention relates to a porcelain oxidation method of aluminium magnesium alloy, which is characterized in that the method comprises the following steps: performing mechanical polishing, chemical oil removal, corrosion, cleaning, neutralization, cleaning, chemical oxidation, cleaning, hot water scalding (50 DEG C), blow-drying with compressed air, and oven drying of an aluminium material to form a porcelain film on the aluminium material surface; wherein the oxidation liquid adopted in the chemical oxidation steps comprises the following components: 1-10 g / L of sulfuric acid, 1-5 g. / L of oxalic acid, 0.1-1 g / L of boric acid, 1-5 g / L of nickel sulfate, 0.1-1 g / L of ammonium sulfate; the process parameters adopted in the chemical oxidation steps are that: current strength of 0.5-1 A / dm2 of, temperature of 40-55 DEG C, time of 40-50 min, and voltage of 20-40 V. The invention is applicable to aluminium magnesium alloy; the obtained film is silver gray; the film thickness is 5-15 microns; the film has good binding force, high hardness and wear resistance, and good thermal insulation, electrical insulation, and corrosion resistance.

Description

[0001] technical field [0002] The invention relates to a porcelain oxidation method for aluminum-magnesium alloys, which belongs to the field of surface treatment of aluminum alloys. Background technique [0003] Magnesium is the main alloying element of aluminum alloy. The maximum solid solubility in aluminum is 17.4%. It can significantly increase the strength of aluminum without excessively reducing the ductility, and has excellent corrosion and welding properties. Magnesium-aluminum in the atmosphere The surface of the alloy reacts with oxygen to form an oxide film, which is amorphous, uneven, and discontinuous, and cannot be used as a reliable protective or decorative film. In order to improve the surface hardness, wear resistance and corrosion resistance of aluminum alloy , the anodic oxidation method is usually used to form a passivation layer of aluminum oxide on the surface of aluminum and aluminum alloys. Porcelain anodic oxidation is to use aluminum alloy to ge...

Claims

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Application Information

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IPC IPC(8): C25D11/08C25D11/10
Inventor 谢利荣
Owner WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY
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