Study on metal corrosion protection mechanism of graphene nano coating

Abstract

Organic coating is considered to be one of the most effective methods to prevent metal corrosion. The corrosion resistance of the coating was tested by the improved copper accelerated acetic acid immersion test, and the quality change of the coating sample before and after immersion was tested. The appearance change of graphene was observed by SEM, and the anticorrosion mechanism of graphene was studied. The results showed that the copper salt accelerated acetic acid salt immersion test accelerated the corrosion process and shortened the determination time. There was no obvious change in the test sample after soaking for 400h. The main anticorrosion mechanism is that the conductive graphene in graphene nano anticorrosive coating can effectively protect the metal substrate by “conductive bridging”.