1Cr18Ni9Ti不锈钢在硫化氢水溶液中的台阶状应力腐蚀破裂  

Stepwise Stress Corrosion Cracking of 1Cr18Ni9Ti Stainless Steel in Aqueous H_2S Solutions

作　　者：左禹[1] 张树霞[1] 

机构地区：[1]北京化工学院应用化学系

出　　处：《北京化工学院学报》1994年第4期58-64,共7页

摘　　要：用恒变形Ｕ形试件应力腐蚀试验、电化学极化和ＡＥＳ分析法研究了１Ｃｒ１８Ｎｉ９Ｔｉ奥氏体不锈钢在室温Ｈ２Ｓ水溶液和９０℃的Ｈ２Ｓｅ＋０．６ｍｏｌ／ＬＮａＣｌ水溶液中的应力腐蚀破裂，两种条件下都发现了台阶状的应力腐蚀裂纹。９０℃时的破裂由〔Ｃｌ〕导致的阳极溶解机理控制，沿夹杂物／基体界面及轧制方向晶界的择优溶解导致台阶状裂纹。在室温无ＮａＣｌ的Ｈ２Ｓ溶液中，破裂机理为氢致开裂，塑性变形造成的局部硬度增高可能是破裂的诱因。Stress corrosion cracking of austenitic 1Crl8Ni9Ti stainless steel in aqueous HwS solution at room temperature and in H25+0.6 mol / L NaCl solution at 90℃ was studied using U-bend specimen test, electrochemical polarization, SEM and AES. Stepwise cracks were found under both conditions. Different mechanisms for cracking of the steel at 90℃ and at room temperature were suggested.

关 键 词：奥氏体不锈钢 硫化氢 应力腐蚀 不锈钢 

分 类 号：TG178[金属学及工艺—金属表面处理]