RESEARCH ON SURFACE CHEMICAL COLOURING AND PROTECTION TECHNOLOGY FOR ALUMINIUM ALLOY FASTENERS

摘要

This research is using chemical method to plate a layer of tight-binding, well-finished and pitch-black coat on the surface of aluminium alloy. The application of the black coat eliminates or reduces the affection of light to the sight of man,improving the appearance of workpieces and the measure of protection. It can be also used in high guality parts and for the decoration and protection of placard of instrument.