1Cr18Ni9Ti不锈钢在含Cl^-、HCO_3^-体系中的孔蚀行为

Pitting Behavior of 1Cr18Ni9Ti Stainless Steel in Solutions Containing Cl - and HCO - 3

采用稳态阳极极化曲线法研究了１Ｃｒ１８Ｎｉ９Ｔｉ不锈钢在含Ｃｌ－及ＨＣＯ－３体系中的腐蚀行为。结果表明：ＨＣＯ－３对不锈钢孔蚀的抑制作用由其与Ｃｌ－的浓度比决定。此浓度比高于临界浓度比时，ＨＣＯ－３缓蚀作用很显著；低于时ＨＣＯ－３基本无缓蚀作用。

Abstract The pitting behavior of 1Cr18Ni9Ti stainless steel in solutions containing Cl - and HCO - 3 has been studied by the method of potentiodynamic anodic polarization. The results show that the pitting initiation can be inhibited by HCO - 3. There is corresponding Critical Ratio with different HCO - 3 concentration [HCO - 3]. For the system in which / is greater than the Critical Ratio , the inhibitive action of HCO - 3 is very obvious. When / is lower than the Critical Ratio , HCO - 3 has no inhibition action.