▎ 摘　　要

NOVELTY - The utility model claims an aerospace fastener cyanide-free cadmium-titanium alloy and graphene closed plating layer structure, comprising a metal substrate and non-cyanide cadmium-titanium alloy plating layer prepared in turn from the inside to the outside on the metal matrix, chromate low chrome colour passivation layer, nanometer hydroxyl graphene closed layer. plating interlayer structure claimed by the utility model, non-cyanide cadmium-titanium alloy and graphene-closed plating layer structure than the prior art preparation has higher corrosion resistance, according to GB/T 10125-2012 "artificial atmosphere corrosion experiment salt fog test" for neutral salt fog test 4500h, no rust generation surfaces of the plating. sealing layer of this utility model adopts chromate low chrome colour passivation technology, solve the pollution problem of high chromium acid passivation, using nanometer graphene prepared by sealing process, has excellent corrosion resistance, lubricity and wear resistance, can reduce aerospace fastener when assembling the risk of passivation film is scratched, prolong the service life of the device.