Magnesium alloy pickling activator and pickling method

A technology of pickling activation and magnesium alloy, which is applied in the field of pickling activator and pickling, can solve the problems of animal and plant damage, excessive manpower and working hours, water source and soil pollution, etc., achieve mild reaction, save manpower and material resources, and clean powerful effect

Inactive Publication Date: 2011-09-28
MITAC PRECISION TECH(KUNSHAN) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because hexavalent chromium is discharged through wastewater, it will cause water and soil pollution, and harm animals and plants, so it does not meet the requirements of environmental protection. Countries around the world have successively banned the use of chromium-containing compounds.
In addition, before the chemical conversion treatment of the magnesium alloy product, in order to remove the residual release agent in the die-casting section, the surface of the magnesium alloy product needs to be polished to make the product surface have a silver-white metallic texture, which also consumes more manpower and man-hours

Method used

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  • Magnesium alloy pickling activator and pickling method
  • Magnesium alloy pickling activator and pickling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, after the magnesium alloy material is degreased and washed with water, the magnesium alloy material is placed in a pickling activator formulated according to the following composition concentration:

[0035] (a) citric acid 6g / L;

[0036] (b) Lactic acid 15g / L;

[0037] (c) Nitric acid 2g / L;

[0038] (d) Corrosion inhibitor 0.001g / L;

[0039] (e) Sodium acetate 3g / L;

[0040] Secondly, the magnesium alloy material is subjected to pickling and activation treatment, the treatment temperature is 42 degrees, and the treatment time is 4 minutes;

[0041] Finally, surface conditioning treatment and chemical conversion treatment are performed on the magnesium alloy material after the pickling treatment.

[0042] The atomic percentage (Atomic%) of the silicon element content in each stage of surface treatment of the magnesium alloy material after the pickling and activation treatment by the above-mentioned pickling activator was tested, and the results are as follows...

Embodiment 2

[0046] First, after the magnesium alloy material is degreased and washed with water, the magnesium alloy material is placed in a pickling activator formulated according to the following composition concentration:

[0047] (a) Citric acid 8g / L;

[0048] (b) Lactic acid 12g / L;

[0049] (c) Nitric acid 3g / L;

[0050] (d) Corrosion inhibitor 0.002g / L;

[0051] (e) Sodium acetate 4g / L;

[0052] Secondly, the magnesium alloy material is subjected to pickling and activation treatment, the treatment temperature is 38 degrees, and the treatment time is 3 minutes;

[0053] Finally, surface conditioning treatment and chemical conversion treatment are performed on the magnesium alloy material after the pickling treatment.

[0054] The atomic percentage (Atomic%) of the silicon element content in each stage of surface treatment of the magnesium alloy material after the pickling and activation treatment by the above-mentioned pickling activator was tested, and the results are as follows...

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PUM

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Abstract

The invention discloses a magnesium alloy pickling activator for pickling activation treatment of magnesium alloys, which takes water as a solvent and comprises citric acid at a concentration of 5 to 10g/L, lactic acid at a concentration of 10 to 20g/L and inorganic strong acid at a concentration of 2 to 4g/L. The invention also provides a magnesium alloy pickling method. In the magnesium alloy pickling activator and the magnesium alloy pickling method, a mixture of organic acids and an inorganic acid is used, chromium compounds are eliminated, environment pollution is avoided, the reaction in the solution is mild, the cleaning capacity is high, the oxide, release agent and silicon impurities on the surface of the magnesium alloy can be better removed, and the surface of the magnesium alloy has the texture of silvery white metal.

Description

【Technical field】 [0001] The invention relates to a pickling activator and a pickling method, in particular to a magnesium alloy pickling activator and a pickling method for pickling activation treatment of magnesium alloys. 【Background technique】 [0002] Magnesium alloy is lighter than engineering plastics, and with the gradual reduction in weight and thickness of consumer electronic products, it has gradually become the main basic material in consumer electronic products such as notebook computers, mobile phones, PDAs and projectors, and has become a material for electronic information products. As a rising star, the scope of application of magnesium alloys has rapidly expanded. In industrial production, the surface treatment of magnesium alloys is becoming more and more important. The surface treatment is mainly to improve the appearance of the product and improve the wear resistance and corrosion resistance. [0003] Before the magnesium alloy chemical conversion treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/12
Inventor 陈其亮朱付成
Owner MITAC PRECISION TECH(KUNSHAN) CORP
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