低浓度含氯介质中氯离子向局部腐蚀闭塞区内的迁移规律及其对应力腐蚀破裂的影响

摘要

The enrichment of chloride anion wimin the occluded cell(OC)for Type 304 austenitic stainleSS steel in low chloride concentration solution has been investigated by means of a simulated OC.The influence of the enrichment of chloride anion on stress corrosion crack(SCC)of Type 304 stainless steel has been studied.It was observed that the amount of chloride anion migration was proportional to the charge flowing through the anode.Owning to the effects of enrichment of chloride anion,low chloride concentration solution could induce SCC for Type 304 stainless steel.