海上油气田用TN110Cr13M材质油套管的腐蚀电化学行为  

Electrochemical Corrosion Behavior of TN110Cr13M Casing in Offshore Oil and Gas Fields

作　　者：余意 蒋东雷 刁欢 王恒 肖谭 张宗君 唐晓[2] YU Yi;JIANG Donglei;DIAO Huan;WANG Heng;XIAO Tan;ZHANG Zongjun;TANG Xiao(Zhanjiang Branch Company,CNOOC,Zhanjiang 524057,China;China University of Petoleum(Huadong),Qingdao 266580,China)

机构地区：[1]中海石油(中国)有限公司湛江分公司,湛江524057 [2]中国石油大学(华东),青岛266580

出　　处：《腐蚀与防护》2022年第7期98-101,共4页Corrosion & Protection

摘　　要：通过高温高压釜模拟某海上油气田井下工况(129.5℃、硫化氢分压0.26 kPa、二氧化碳分压2.75 MPa),采用电化学试验和腐蚀环境暴露试验测试了TN110CR13M油套管钢在此环境中的腐蚀行为。结果表明:在模拟环境中,TN110CR13M油套管钢具有较好的耐蚀性,其平均腐蚀速率仅为0.0188 mm/a。且经过30 d暴露试验后,试样表面可生成耐蚀性好、结构完整的高含Cr腐蚀产物膜,提高了材料的耐蚀性。The downhole working conditions of an offshore oil and gas field(129.5℃,hydrogen sulfide partial pressure 0.26 kPa,carbon dioxide partial pressure 2.75 MPa)were simulated by a high temperature autoclave,and the corrosion behavior of TN110CR13M oil casing steel in this environment was tested by electrochemical test and corrosive environment exposure test.The results showed that in the simulated environment,TN110CR13M oil casing steel had good corrosion resistance,and its average corrosion rate was only 0.0188 mm/a.And after 30 day exposure test,a high-Cr-containing corrosion product film with good corrosion resistance and complete structure could be formed on the surface of the sample,which improved the corrosion resistance of the material.

关 键 词：海上油气田 高温高压 CO_(2)/H_(2)S共存 电化学 钝化膜 

分 类 号：TG174[金属学及工艺—金属表面处理]