110 ksi钢级高氮不锈钢管材性能研究  

Study on Performance of 110 ksi High⁃nitrogen Stainless Steel Pipe

作　　者：何石磊 王涛[1,2] 陈浩明 包志刚 李远征 汪强 HE Shilei;WANG Tao;CHEN Haoming;BAO Zhigang;LI Yuanzheng;WANG Qiang(CNPC Baoji Petroleum Pipe Industry Co.,Ltd.,Baoji 721008,Shaanxi,China;CNPC Chinese National Engineering Research Center for Petroleum and Natural Gas Tubular Goods Co.,Ltd.,Xi´an 710018,China)

机构地区：[1]中国石油集团宝石管业有限公司,陕西宝鸡721008 [2]中油国家石油天然气管材工程技术研究中心有限公司,西安710018

出　　处：《焊管》2025年第3期29-34,共6页Welded Pipe and Tube

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目“二氧化碳规模化捕集、驱油与埋存全产业链关键技术研究及示范”(项目编号2021ZZ01)。

摘　　要：针对高氮不锈钢管材在油气田工况中服役问题,开展了高氮不锈钢管材的强韧性、点蚀、模拟CO_(2)工况下腐蚀性能、在模拟酸化液及酸化返排液中腐蚀性能等试验研究。利用金相显微镜、扫描电镜、激光共聚焦显微镜等工具分析了管材的显微组织和表面微观形貌,结果表明,试制的110 ksi钢级高氮不锈钢内衬管材具有优异的强塑韧性匹配和抗氯化物点蚀性能,在高含氯离子和高矿化度的CO_(2)溶液环境中具有优异的耐腐蚀性能,优于2205不锈钢,满足API 5CRA标准中对110 ksi钢级22-5-3类耐蚀合金管材要求。在150℃酸化返排液溶液中高氮不锈钢具有优异的耐腐蚀性能,低于2205不锈钢管材的腐蚀速率;而在150℃模拟10%盐酸酸化工况中高氮不锈钢耐腐蚀性能较差,因此建议在高温的盐酸酸化工况中服役需考虑应用抗酸化腐蚀缓蚀剂。In order to solve the problem of high nitrogen stainless steel pipe used in oil and gas field,the experimental study of strength and toughness,pitting corrosion,corrosion performance under simulated CO_(2) condition,corrosion performance in simulated acidification and flowback fluid after acidification operation were carried out.The microstructure and surface morphology of the sample were analyzed by tools such as Metallographic Microscope,scanning Electron Microscopy and LSCM etc.The results showed that the trial-produced high-nitrogen stainless steel pipe with 110 ksi steel grade had excellent strength and toughness,excellent resistance to chloride pitting corrosion and uniform corrosion in high chloride ion or high salinity CO_(2) solution to meet the requirements of API 5CRA standard for 110 ksi grade 22-5-3 corrosion-resistant alloy pipes,superior to that of 2205 stainless steel.The high nitrogen stainless steel has superior corrosion resistance to 2205 stainless steel in the acidification flowback solution at 150℃.However,the corrosion resistance of high nitrogen stainless steel is poor in the simulated 10%hydrochloric acidification condition at 150℃,so it is recommended to consider the application of anti-acidizing corrosion and corrosion inhibitor in the service of high temperature hydrochloric acid acidification.

关 键 词：高氮不锈钢 强韧性 点蚀 酸化返排液 腐蚀速率 

分 类 号：TG142.7[一般工业技术—材料科学与工程]