Inconel718合金在高含H_2S/CO_2环境下的应力腐蚀行为  

Stress Corrosion Behavior of Inconel718 Alloy in High H_2S and CO_2 Containing Environment

作　　者：王春光[1,2] 王东哲[1,2] 万红[1,2] 莫燕[1,2] 刘虹[1,2] 向祥蓉[1,2] 金文勇[1,2] 葛锋[3] 

机构地区：[1]重庆材料研究院有限公司,重庆400707 [2]国家仪表功能材料研究中心,重庆400707 [3]西南大学材料科学与工程学院,重庆400715

出　　处：《热加工工艺》2015年第10期107-109,共3页Hot Working Technology

基　　金：重庆市自然科学基金(cstc2012jj A50027);国家"863计划"科技攻关项目(2012AA091100;2012AA091101);国家科技部科研院所技术开发专项项目(2014EG119121)

摘　　要：针对高含硫油气田开发过程中所面临的材料腐蚀问题,利用CORTEST哈氏合金高压釜对高强度Inconel718合金在2.07MPa H2S分压、3.45MPa CO2分压、10%Na Cl水溶液,177℃下进行720h的应力腐蚀开裂试验。研究在此环境下合金材料的应力腐蚀敏感性,运用EPMA分析了试样被腐蚀后的微观形貌与结构特征,利用ICP分析了水样成分,对比发现了腐蚀后钝化膜表面主要是Ni S2和Cr2S3。应力腐蚀开裂试验表明,这种高强度Inconel718合金在不强于此环境下的应力腐蚀敏感性小,未发现应力腐蚀裂纹。To resolve the materials corrosion problems during exploiting high sulfur oil and gas field,the stress corrosion crack（SCC） behavior of Inconel718 alloy for 720 h was studied,under H2 S partial pressure of 2.07 MPa,CO2 partial pressure of3.45 MPa,10%Na Cl aqueous solution and test temperature of 177℃.The electronic parts Manufacturers Association（EPMA）methods was applied to characterize the microstructure and corrosion performance of the samples,and Inductively Coupled Plasma（ICP） was used to solution after test.The results show that passive film is mainly composed of Ni S2 and Cr2S3,the stress corrosion sensitivity is very low for high strength Inconel718 alloy,and no stress corrosion crack appears.

关 键 词：INCONEL718 应力腐蚀 H2S CO2 NACL溶液 

分 类 号：TG172.8[金属学及工艺—金属表面处理]