Light metal surface micro plasma ceramic coating technology

Abstract

The present invention provides a light metal surface microplasma ceramic coating process. It is characterized by that it utilizes electrolytic method to make oxidic film be grown on surface of base material. Its electrolytic solution is made up by using the following raw materials: (by wt%) 5-10% of alkaline salt solution, 4-6% of Na2O2, 0.5-1% of NaF, 2-3% of CH3COONa, 1-3% of Na3VO3 and 80-87% of H2O. Besides, said invention also provides the concrete steps of its electrolytic method.

Description

technical field [0001] The invention relates to a micro-plasma ceramic coating process on the surface of light metal, which can be used in the corrosion resistance of automobile industry, aerospace industry, shipbuilding industry, photoelectric technology industry, micro-electromechanical industry, information industry, pharmaceutical industry, orthopedic transplantation, and satellite communication industry. , Wear resistance, high temperature resistance, high voltage resistance, coating hardness, coating thickness, burr removal, dimensional precision, metal fatigue strength, coating adhesion, etc., belong to the field of ceramic technology. Background technique [0002] The traditional ceramic spraying technology is mainly ceramic powder plasma spraying and ceramic rod thermal spraying technology. The ceramic powder is thermally melted, and then the melted liquid-phase ceramics are sent to the substrate through compressed air, and the liquid-phase ceramic body is cooled an...

AI Technical Summary

Problems solved by technology

[0002] The traditional ceramic spraying technology is mainly ceramic powder plasma spraying and ceramic rod thermal spraying technology. The ceramic powder is thermally melted, and then the melted liquid-phase ceramics are sent to the substrate through compressed air, and the liquid-phase ceramic body is cooled and hardened, thereby covering the substrate to form a ceramic coating. Since the ceramic layer is an external coating, Therefore, the bonding strength between the coating and the base material is not very good, and it is easy to cause the coating to peel off during use, and due to the limitation of the thermal melting process in the spraying process, the surface finish of the coating is poor, and it is often necessary to carry out high-strength spraying. Grinding is used to meet the smoothness requirements, but due to poor bonding strength, the surface ceramic coating is easy to peel off due to the effect of surface compressive stress during processing; hard anodized layers with better bonding strength, such as hard chrome layers, have higher hardness. Low, the wear life is greatly limited, and more serious heavy metal ion environmental pollution will be generated in the production process

Images