Treatment process for surface of magnesium

Abstract

The invention discloses a treatment process for the surface of magnesium. The treatment process is characterized by comprising the following steps that 1, dipping degreasing treatment is conducted in a degreasing agent; 2, after degreasing is conducted, a part is put into a solution composed of sodium hydroxide and water and is washed in alkali liquor for 5-15 min; 3, the part is washed in cold water for 5-7 min and is dipped in a solution composed of chromium oxide, calcium nitrate and the water for 5-15 min; 4, the part is washed in cold water for 2-5 min and is dipped in a solution composed of chromium oxide, sodium phosphate and the water for 3-12 min; and 5, the part is washed in cold water for 2 min and then dried. According to the treatment process for the surface of the magnesium, the process is simple, the oxide skin removing speed can be high and part matrix damage can be reduced through strict process parameter control, and removing is more thorough.

Description

technical field [0001] The invention belongs to the field of magnesium surface treatment, in particular to a magnesium surface treatment process. Background technique [0002] For the active metal magnesium, its surface is prone to oxidation, forming a dense oxide film. The oxide film is loose and porous. Anti-oxidation measures must be taken for this type of magnesium. Existing measures will treat some materials that are particularly sensitive to temperature. Magnesium parts will cause the surface of the parts to reach a very high temperature, causing deformation or cracks of the magnesium parts, affecting the dimensional accuracy and normal use of the parts, and even causing the parts to break in severe cases. In the prior art, the magnesium surface oxidation treatment process has the disadvantages of complex process, many steps, serious damage to the part matrix, and incomplete removal. Contents of the invention [0003] The object of the present invention is to aim at...

AI Technical Summary

Problems solved by technology

[0002] For the active metal magnesium, its surface is prone to oxidation, forming a dense oxide film. The oxide film is loose and porous. Anti-oxidation measures must be taken for this type of magnesium. Existing measures will treat some materials that are particularly sensitive to temperature. Magnesium parts will cause the surface of the parts to reach a very high temperature, causing deformation or cracks of the magnesium parts, affecting the dimensional accuracy and normal use of the parts, and even causing the parts to break in severe cases

In the prior art, the magnesium surface oxidation treatment process has the disadvantages of complex process, many steps, serious damage to the part matrix, and incomplete removal.