Analysis and Improvement of Chromium Plating Corrosion for Piston Rod in Marine Environment

In order to solve the corrosion issue of the piston rod coating of the anti-aircraft tank outrigger in the marine environment, the corrosion mechanism of the chrome plating substrate is analyzed based on a case of fault. The results can provide a theoretical basis and direction for the diagnosis and improvement of the corrosion problem of the outrigger piston rod. The characteristics of the inherent cracks in the chromium layer are analyzed. Then, the improved methods using Ep.Cr30oCr70hd and sealant treatment on the coating surface is proposed. The salt spray tests and practical applications show that the surface treatment of piston rods with double-layer chromium and sealant has a good anti-corrosion effect.