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Coloring method of micro-arc oxidation ceramic layer on surface of magnesium alloy part

A technology of micro-arc oxidation and magnesium alloy, which is applied to the coloring of micro-arc oxidation ceramic layer on the surface of magnesium alloy parts and the field of metal surface treatment, can solve the problem of single color of magnesium alloy micro-arc oxidation ceramic layer, etc., and achieves easy mass production, The effect of low process cost and simple process

Inactive Publication Date: 2010-09-15
HOHAI UNIV CHANGZHOU
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  • Application Information

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Problems solved by technology

[0003] The invention aims at the single color problem of the magnesium alloy micro-arc oxidation ceramic layer, and provides a coloring method of the magnesium alloy micro-arc oxidation ceramic layer, so as to meet the needs of industrial and agricultural production and effectively increase the added value of finished products

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  • Coloring method of micro-arc oxidation ceramic layer on surface of magnesium alloy part
  • Coloring method of micro-arc oxidation ceramic layer on surface of magnesium alloy part

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Embodiment 1

[0016] Example 1, please refer to the attached figure 1 , a coloring method for the micro-arc oxidation ceramic layer on the surface of magnesium alloy parts. Firstly, the magnesium alloy parts are polished with 400-1200 water sandpaper in sequence, and the surface oil is wiped with absolute alcohol or acetone, and then cleaned with deionized water. Blow dry for later use, followed by 50g / L sodium hexametaphosphate, 15g / L sodium hydroxide, 8g / L ammonium hydrogen fluoride, 10g / L hexamethylenetetramine, 5g / L ammonium dihydrogen phosphate, glycerin 9ml / L, In the triethanolamine 60ml / L phosphate electrolyte, the current density is 3A / dm 2 , the frequency is 172.45Hz, and the process parameters are 5min, a layer of ceramic layer with a thickness of 12μm and easy to stain is formed on the surface of magnesium alloy by micro-arc oxidation. The magnesium alloy parts after micro-arc oxidation are put into 0.5g / L organic dyeing solution, dyed at room temperature for 30 hours, and the f...

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Abstract

The invention discloses a coloring method of a micro-arc oxidation ceramic layer on a surface of a magnesium alloy part, the method is characterized by taking staining solution thereof as the organic staining solution, keeping the PH value between 4 and 6 and dip-dying for 20-40h at normal temperature, and the method has the characteristics of simple process, good volume production property, lower cost, good coloring quality, environmental protection, safety and the like.

Description

technical field [0001] The invention relates to a coloring method for a micro-arc oxidation ceramic layer on the surface of a magnesium alloy product, which belongs to the metal surface treatment technology. Background technique [0002] Micro-arc oxidation technology is a new technology that has emerged in recent years to form ceramic films in situ on the surface of magnesium, aluminum and other metals and their alloys. This technology breaks through the limitation of the working voltage of traditional anodizing, and introduces the working area into the high-voltage discharge area. Under the joint action of thermochemistry, plasma chemistry, and electrochemistry, the base metal is directly transformed into oxide ceramics through instantaneous high-temperature sintering. . The ceramic layer has high hardness, good toughness, metallurgical bonding with the substrate, and has the characteristics of corrosion resistance, high temperature oxidation resistance, and good insulati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/30
Inventor 杨华山包晔峰蒋永锋
Owner HOHAI UNIV CHANGZHOU