Effect of Iron Irradiation on Corrosion Behaviors of 304 Stainless Steel in High Temperature Water

Using 3.5 MeV iron ions to simulate irradiating 304 stainless steel, the effect of irradiation on the corrosion behavior of nuclear power structure materials was studied. The internal microstructure, average corrosion rate, morphology, structure and composition of corrosion products were characterized. The results showed that irradiation introduced a large number of dislocation defects inside the material, which increased the average corrosion rate of the material in a high-temperature water environment. The oxide film formed after the irradiated sample corroded was more uneven, and the Cr content in the oxide film was reduced. The acceleration of the ion diffusion process in the irradiated sample was the root cause of the deterioration of the protection of the oxide film and the acceleration of corrosion.