Study on corrosion resistance and wear resistance of silver coatings strengthened by graphene oxide
To meet the need for corrosion and wear resistance of conductive silver coatings for electrical connectors during service,the silver-graphene oxide composite coating on the copper substrate surfaces was prepared by using the direct current electrodeposition from a cyanide free silver graphene oxide composite plating solution with 5,5-dimethylhydantoin as the main complexing agent in this paper.The surface morphology,composition,and crystal structure of the composite coating were characterized us-ing the optical microscope,scanning electron microscope,energy spectrometer,and X-ray diffractom-eter.The corrosion resistance and wear resistance of the composite coating were evaluated by the elec-trochemical experiments and wear tests.The results show that the addition of graphene oxide changes the crystal growth direction of silver,refines the microstructure,and improves the hardness,corrosion resistance and wear resistance of the silver coating.
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