含H_(2)S环境下15CrMo钢冲刷腐蚀行为  

Erosion-Corrosion Behavior of 15CrMo Steel in H_(2)S Environment

作　　者：刘波 邵珠峰 赵勇 王志芹 杨超[2] 刘建国[3] LIU Bo;SHAO Zhufeng;ZHAO Yong;WANG Zhiqin;YANG Chao;LIU Jianguo(Shandong Ruikang Safety Evaluation Co.,Ltd.,Rizhao Shandong 276800,China;Technology Inspection Center of Shengli Oilfield,Sinopec,Dongying Shandong 257000,China;China University of Petroleum(East China),Qingdao Shandong 266580,China)

机构地区：[1]山东瑞康安全评价有限公司,山东日照276800 [2]中国石化胜利油田分公司技术检测中心,山东东营257000 [3]中国石油大学(华东),山东青岛266580

出　　处：《当代化工》2024年第12期2864-2868,共5页Contemporary Chemical Industry

基　　金：山东省自然科学基金项目(项目编号:ZR2019MEM014)。

摘　　要：以珠光体组织的15CrMo钢为研究对象,通过高温高压反应釜模拟含H_(2)S、含砂环境,通过浸泡实验和电化学实验、结合腐蚀图像和元素分布分析方法对含H_(2)S环境下15CrMo钢的冲刷腐蚀行为进行了研究。结果表明:Cr和Mo形成的致密腐蚀产物层对15CrMo钢具有良好的保护作用,极化曲线阳极段存在明显钝化区。随后由于砂粒的冲击作用导致腐蚀产物层发生破坏,金属表面转化为活化腐蚀;同时腐蚀电位基本保持不变,说明主要以点蚀特征为主,但没有出现典型的沟槽状冲刷腐蚀特征。此外,在H_(2)S和冲刷的共同作用下,15CrMo钢表面形成微裂纹。15CrMo steel with pearlitic structure was taken as the research object,and the environment containing H_(2)S and sand was simulated and established by high temperature-pressure reactor,in which the erosion corrosion behavior of 15CrMo steel in the environment containing H_(2)S was studied by immersion experiment and electrochemical experiment,combined with corrosion image and element distribution analysis method.The results showed that the dense corrosion product layer formed by Cr and Mo had a good protective effect on 15CrMo steel,and there was an obvious passivation zone in the anode section of the polarization curve.Subsequently,the impact of sand particles led to the destruction of the corrosion product layer,and the metal surface was transformed into active corrosion.At the same time,the corrosion potential remained basically unchanged,indicating that pitting corrosion was the main feature,but there was no typical trench erosion corrosion feature.In addition,under the combined action of H_(2)S and scouring,micro-cracks were formed on the surface of 15CrMo steel.

关 键 词：H_(2)S环境 15CRMO钢 气液固多相流 冲刷腐蚀 腐蚀图像 极化曲线 腐蚀电位 腐蚀电流密度 

分 类 号：TQ050.91[化学工程]