Study on the Mechanism of Silver-Graphene Composite Coating in Coastal High Salt and High Humidity Environment

The corrosion of power grid equipment will be accelerated by the high salt and humidity environment along the coast of Fujian, and its service life will be affected, and lead to the failure of equipment and structures. This paper mainly studies the change of the metal indicator composition of silver-Graphene composite coating hanging pieces with different Graphene concentrations in the coastal high salt and high humidity environment. The mechanism of silver-Graphene composite coating on the contact resistance of metal equipment in the coastal high salt and high humidity environment is analyzed by scanning electron microscope, XPS analysis and XDR analysis. The results show that the silver coating of traditional electrical equipment will produce dark products under the action of coastal high salt and high humidity environment β-Ag2S, thus improving the contact resistance, affecting the conductivity and the reliability and stability of electrical contact. The silver-Graphene composite coating can effectively reduce the generation of Ag2S, maintain good conductivity, and achieve corrosion resistance. However, the higher the concentration of Graphene, the better the effect.