304L不锈钢在胺法CO_(2)捕集体系中的腐蚀行为研究  

Corrosion Behavior of 304L Stainless Steel in Amine CO_(2) Capture System

作　　者：樊学华 王永庆 李向阳 唐德志 房昆 孙冲 孙建波 FAN Xuehua;WANG Yongqing;LI Xiangyang;TANG Dezhi;FANG Kun;SUN Chong;SUN Jianbo(School of Materials Science and Engineering,China University of Petroleum(East China),Qingdao 266580,China;China Petroleum Engineering&Construction Corp.Beijing Company,Beijing 100085,China;China Petroleum Engineering&Construction Corp.,Beijing 100120,China;PetroChina Planning and Engineering Institute,Beijing 100083,China)

机构地区：[1]中国石油大学(华东)材料科学与工程学院,山东青岛266580 [2]中国石油工程建设有限公司北京设计分公司,北京100085 [3]中国石油工程建设有限公司,北京100120 [4]中国石油天然气股份有限公司规划总院,北京100083

出　　处：《油气与新能源》2025年第2期39-46,共8页Petroleum and new energy

基　　金：国家自然科学基金项目“含杂质超临界CO_(2)输送环境管线钢的环境断裂敏感性及机理研究”(52001328);中国石油天然气股份有限公司重大科技专项“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”之课题1“炼化企业低浓度二氧化碳低成本高效捕集技术研究”(2021ZZ01-01)。

摘　　要：为深入研究304L不锈钢的腐蚀行为,探究其在胺法CO_(2)捕集体系中的应用前景,利用长周期浸泡腐蚀试验和电化学测试方法(动电位循环极化曲线和电化学阻抗谱),结合扫描电镜和X射线光电子能谱分析手段,分析了304L不锈钢在胺法CO_(2)捕集体系下的腐蚀速率、电化学行为及耐蚀能力的差异。结果表明:304L不锈钢在胺法CO_(2)捕集体系中随温度升高腐蚀电位降低,维钝电流密度增大,过钝化电位降低,耐蚀性下降;高Cl^(-)浓度易诱发点蚀,但CO_(2)的引入使钝化膜保护性更好;304L不锈钢在胺法CO_(2)捕集体系中的腐蚀速率较低,这与其形成以致密的Cr_(2)O_(3)为主要成分的钝化膜有关。In order to deeply study the corrosion behavior of 304L stainless steel and explore its application prospect in amine CO_(2) capture system,this paper analyzes corrosion rate,electrochemical behavior,and corrosion resistance of 304L stainless steel in amine CO_(2) capture system by long-period immersion test and electrochemical methods (potentiodynamic cycle polarization curve and electrochemical impedance spectroscopy) with scanning electron microscopy (SEM)&X-ray photoelectron spectroscopy (XPS) analysis methods.The results show that in amine CO_(2) capture system,the corrosion potential of 304L stainless steel would decrease,dimensional passivation current density would increase,the over passivation potential would decrease,and the corrosion resistance would decrease with the increase of temperature,High Cl^(-) concentration is easy to induce pitting corrosion but the introduction of CO_(2) makes the passivation film more protective,and the corrosion rate of 304L stainless steel is quite low in amine CO_(2) capture system,which is related to the formation of passivation film with dense Cr_(2)O_(3) as the main component.

关 键 词：304L不锈钢 胺法CO_(2)捕集 电化学 腐蚀行为 

分 类 号：TG172[金属学及工艺—金属表面处理]