Magnesium alloy electrochemical polishing solution and method of processing magnesium alloy with the polishing solution

Abstract

A magnesium alloy electrochemical polishing solution comprises following components by weight: 55-80% of polyol, 1-10% of an organic acid, 1-5% of phosphoric acid and 15-35% of pure water. A method of processing a magnesium alloy with the polishing solution is also provided. The method includes: degreasing the magnesium alloy, subjecting the magnesium alloy to electrochemical polishing processing in the electrochemical polishing solution at 20-25 DEG C at a voltage of 6-20 V for 2-30 min; and baking the polished magnesium alloy. The polishing solution and the method are advantageous in that: the magnesium alloy is free of pretreatment before the electrochemical polishing step; the magnesium alloy subjected to the electrochemical polishing is high in glossiness; magnesium alloy products with different glossiness degrees can be obtained by controlling the polishing time, treatment of waste water of the electrochemical polishing solution is simple, and the waste water can be reutilized after being filtered.

Description

【Technical field】 [0001] The invention relates to a magnesium alloy surface treatment technology, in particular to a magnesium alloy electrochemical polishing solution and a method for treating the magnesium alloy. 【Background technique】 [0002] Magnesium is an abundant element on the earth. It is the 8th largest element on the earth. It has a wide range of raw materials and is highly recyclable. It will not cause too much pollution to the ecology from production to disposal, which is in line with environmental protection awareness. The specific gravity of magnesium alloy is 1.7, which is 23% of iron, 25% of zinc, 20% of steel and 66% of aluminum alloy. Magnesium alloy is the lightest engineering structure metal material with low density, high specific strength, Good electrical conductivity and electromagnetic shielding performance. At present, magnesium alloys have been widely used in the 3C industry to reduce the weight of 3C products. [0003] During the manufacture an...

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Problems solved by technology

[0003] During the manufacture and processing of magnesium alloys, it is usually necessary to obtain a high-gloss surface, but there are usually oxide films or impurities on the surface of magnesium alloys, so the surface gloss is not high, which affects the overall appearance of magnesium alloy products, thereby affecting the application range of magnesium alloy products , in addition, the high-gloss surface cannot be obtained by ordinary pickling process

[0004] In view of this, it is necessary to provide an electrochemical polishing liquid and its method for processing magnesium alloys, so as to solve the problem that the surface gloss of the above-mentioned magnesium alloys is not high