16Mn低合金钢在H2S环境中的氢损伤性能  

Hydrogen Damage Properties of Low Alloy Steel 16Mn in H_2S Environment

作　　者：蔡晓文[1] 戈磊[1] 陈长风[1] 

机构地区：[1]中国石油大学材料科学与工程学院,北京102249

出　　处：《腐蚀与防护》2010年第7期520-522,559,共4页Corrosion & Protection

基　　金：国家自然科学基金项目(50601029,50771104)资助

摘　　要：根据NACE TM0284标准对16Mn低合金钢在含饱和H2S的标准A溶液中的氢损伤性能进行了研究。利用CHI660C电化学测试系统对16Mn钢腐蚀渗氢前后的电化学性能进行测量。结果表明,16Mn钢渗氢量较高,对氢致开裂(HIC)较敏感,试样出现了典型的阶梯状HIC裂纹。腐蚀渗氢后试样的自腐蚀电位明显负移,自腐蚀电流密度增大,使得阳极溶解速率增加,材料耐蚀性能降低。16Mn钢P、Mn、S的高含量决定了其特殊的组织性能——高浓度缺陷,致使其氢损伤较严重。According to NACE TM0284, the hydrogen damage properties of low alloy steel 16Mn were investigated in solution A saturated with H2 S. The electrochemical properties of 16Mn steel were measured. The results showed that the amount of hydrogen（H） permeation was high and 16Mn steel was sensitive to HIC, which leaded to the typicall ladder-shaped HIC cracks in 16Mn steel. The corrosion potential was shifted negatively and the corrosion current density was higher after H permeation than that without H permeation. The major reason for the formation of defects was the high contents of P, Mn and S in 16Mn steel.

关 键 词：渗氢 氢致开裂 电化学测试 位错 

分 类 号：TG172.8[金属学及工艺—金属表面处理]