超级13Cr不锈钢在高CO_(2)/H_(2)S分压比环境中的腐蚀行为  

Corrosion Behavior of Super 13Cr Stainless Steel in High CO_(2)/H_(2S) Partial Pressure Ratio Environment

作　　者：张俊莹 朱新宇 李希明 陈曦 陈长风[1,2] ZHANG Junying;ZHU Xinyu;LI Ximing;CHEN Xi;CHEN Changfeng(China University of Petroleum(Beijing),Beijing 102249,China;Beijing Key Laboratory of Material's Failure,Corrosion and Protection of Oil/Gas Facilities,Beijing 102249,China;CNOOC(Tianjin)Pipeline Engineering Technology Co.,Ltd.,Tianjin 300452,China;PetroChina International Co.,Ltd.,Beijing 100033,China)

机构地区：[1]中国石油大学(北京),北京102249 [2]油气装备材料失效与腐蚀防护北京市重点实验室,北京102249 [3]中海油(天津)管道工程技术有限公司,天津300452 [4]中国石油国际事业有限公司,北京100033

出　　处：《腐蚀与防护》2023年第9期44-50,共7页Corrosion & Protection

摘　　要：采用高温高压反应釜进行浸泡腐蚀试验,分析了超级13Cr不锈钢在低H_(2)S分压、高CO_(2)分压环境中的腐蚀行为;采用单轴拉伸及三点弯曲试验,分析了该钢的应力腐蚀开裂(SCC)敏感性。结果表明:在低H_(2)S分压、高CO_(2)分压环境中,温度对该钢腐蚀速率及腐蚀形貌的影响最显著;随着温度的上升,钢表面钝化膜逐渐转变为腐蚀产物膜,腐蚀速率呈先上升后缓慢下降的趋势;在高温下,CO_(2)分压对该钢腐蚀速率的影响较为明显,呈先上升后下降的趋势;在高CO_(2)/H_(2)S分压比条件下,H_(2)S分压对该钢腐蚀速率的影响不显著,该钢在24℃下的SSCC敏感性高,在60℃和220℃下SCC敏感性低。The corrosion behavior of super 13Cr stainless steel in low H_(2S) partial pressure and high CO_(2) partial pressure environment was analyzed by immersion corrosion test in high temperature and high pressure reactor.The sensitivity of the steel to stress corrosion cracking(SCC) was analyzed by uniaxial tensile test and three-point bending test.The results showed that the temperature had the most significant effect on the corrosion rate and corrosion morphology of the steel in the environment of low H_(2S) partial pressure and high CO_(2) partial pressure.With the increase of temperature,the passivation film on the steel surface gradually changed into a corrosion product film,and the corrosion rate increased first and then decreased slowly.At high temperature,the effect of CO_(2) partial pressure on the corrosion rate of the steel was obvious,showing a trend of increasing first and then decreasing.Under the condition of high CO_(2)/H_(2S) partial pressure ratio,the effect of H_(2S) partial pressure on the corrosion rate of the steel was not significant.The steel had high SSCC sensitivity at 24 ℃ and low SCC sensitivity at 60 ℃ and 220 ℃.

关 键 词：超级13Cr不锈钢 CO_(2) H_(2)S 腐蚀行为 应力腐蚀开裂(SCC) 

分 类 号：TG174[金属学及工艺—金属表面处理]