Modeling of Galvanic Corrosion in three-metal Systems Consisting of ZM5 Magnesium Alloy, 6XXX Series Aluminium Alloy and 304 Stainless Steel under Thin Electrolyte Layer by Numerical Simulation, Electrochemical and Salt Spray Test

Based on Ohm's law and charge conservation law and taking the polarization curves of the materials as the boundary conditions, the galvanic corrosion of a communication equipment in atmospheric environment is calculated and analyzed by numerical simulation, which is consistent with the salt spray test result. The effects of thin electrolyte layer thickness and coating damage factor on galvanic corrosion are evaluated, the corrosion mechanism of communication equipment is analyzed, and the corresponding anti-corrosion strategy is put forward.