Corrosion Resistance of 304 Stainless Steel According to RCC-M 1310 Sensitization Standard

Although the corrosion resistance of stainless steel materials is generally good,they are more sensitive to inter-granular corrosion.Under the RCC-M 1310 standard,three different kinds of 304 stainless steel material were chosen to test the inter-granular corrosion degree of 304 stainless steel through H2SO4-CuSO4 method.Then effect of carbon content and grain size on the inter-granular corrosion resistance could be observed and the inter-granular corrosion degree was quantitatively analyzed by the DL-EPR technology.The results showed that under RCC-M 1310 standards,the 304 stainless steel showed more serious inter-granular corrosion and the grain boundary was wider and deeper as the carbon content was higher and grain was greater.