深海油气输送用X70厚壁直缝埋弧焊钢管的耐蚀性  

Corrosion Resistance of X70LSAW Pipe with Heavy Wall Used for Oil and Gas Transportation in Deep Sea

作　　者：牛爱军[1,2] 毕宗岳[1,2] 牛辉[1,2] 黄晓辉[1,2] 任永峰[1,2] 

机构地区：[1]国家石油天然气管材工程技术研究中心,宝鸡721008 [2]宝鸡石油钢管有限责任公司钢管研究院,宝鸡721008

出　　处：《腐蚀与防护》2016年第10期806-810,共5页Corrosion & Protection

基　　金：国家高技术研究发展计划(863)项目(2013AA09A219)

摘　　要：开发试制了深海油气输送用X70厚壁直缝埋弧焊(LSAW)钢管(1 016mm,壁厚36.5mm),对管线钢的化学成分、组织和力学性能进行了分析,并通过氢致开裂(HIC)、硫化物应力腐蚀(SSC)、腐蚀浸泡等试验研究了钢管管体及焊接接头的耐腐蚀性能。结果表明:该试验钢管的管体及焊接接头具有良好的抗氢致开裂和抗硫化物应力腐蚀开裂性能,腐蚀速率小于0.09mm/a,可用于具有腐蚀性的海洋环境中。X70longitudinal submerged arc welded（LSAW）pipe with heavy wall used for oil and gas transportation in deep sea（1 016 mm,wall thickness of 36.5 mm）was developed and produced.The chemical composition,microstructure and mechanical properties of the pipeline steel were analyzed,and the corrosion resistance of the pipe body and welded joint was studied through hydrogen induced cracking（HIC）,sulfide stress corrosion（SSC）and corrosion immersion tests.The results show that the body and welded joint of the X70 LSAW pipe had good resistance to hydrogen-induced cracking and sulfide stress corrosion cracking,and their corrosion rates were all less than 0.09mm/a,which means that the X70 LSAW pipe can be used in corrosive marine environment.

关 键 词：直缝埋弧焊(LSAW) 海底管线 X70钢 厚壁 力学性能 耐腐蚀性能 

分 类 号：TG335.5[金属学及工艺—金属压力加工]