Galvanic Corrosion Behavior of Stainless Steel Clad Steel in Red Soil

The galvanic corrosion behavior of stainless steel clad steel in red soil was investigated by the weight loss method and electrochemical methods. SEM and XRD were used to observe and analyze the sample surface morphology and composition of corrosion products. The results showed that the formation of the galvanic couple between stainless steel and carbon steel accelerated the corrosion of the anodic metal. With the increase of galvanic couple area ratio of cathode to anode, the galvanic current increased gradually. The stainless steel did not corrode after soaking for 45 d, but severe general corrosion happened in carbon steel, and the corrosion products were mainly iron oxides.