高流速、高盐、高CO_(2)湿气条件下X60管线钢顶部的腐蚀行为  

Top of Line Corrosion Behavior of X60 Pipeline Steel in CO_(2) Wet Gas Environment with High Cl-Concentration and High Gas Flow Rate

作　　者：于勇 樊学华 张玉楠 朱金阳 陈丽娟 刘兆文 张雷 YU Yong;FAN Xue-hua;ZHANG Yu-nan;ZHU Jin-yang;CHEN Li-juan;LIU Zhao-wen;ZHANG Lei(China Petroleum Engineering&Construction Co.,Ltd.,Beijing Company,Beijing 100085,China;National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China;China Petroleum Engineering&Construction Corporation Middle East Region Branch Company,Beijing 100120,China;Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]中国石油工程建设有限公司北京设计分公司,北京100085 [2]北京科技大学国家材料服役安全科学中心,北京100083 [3]中国石油工程建设有限公司中东地区公司,北京100120 [4]北京科技大学新材料技术研究院,北京100083

出　　处：《材料保护》2021年第6期59-63,共5页Materials Protection

基　　金：中国石油集团工程股份有限公司科学研究与技术开发项目(CPECC2018KJ04)资助。

摘　　要：为明确X60管线钢在高流速、高含盐、高含CO_(2)湿气条件下的顶部腐蚀行为和规律,采用高速湿气环路系统对X60管线钢进行湿气顶部腐蚀模拟评价试验。通过腐蚀前后试样的失重量评估X60管线钢湿气顶部腐蚀的情况,并采用扫描电子显微镜(SEM)、能谱分析(EDS)以及X射线衍射仪(XRD)等测试分析手段,研究了不同含水率和不同Cl-浓度对X60管线钢湿气顶部腐蚀行为的影响。结果表明:在1 MPa CO_(2)、气体流速10 m/s、Cl^(-)含量分别为130000,170150 mg/L,含水率分别为0.03%和0.05%的工况下,X60管线钢试样表面均有结晶盐粒分布,即在较长服役周期下存在结垢风险。在Cl^(-)含量为130000 mg/L时,高含水率能促进X60管线钢的腐蚀;当Cl^(-)含量增至170150 mg/L时,含水率的升高反而抑制X60管线钢的顶部腐蚀。To clarify the top of line corrosion behavior of X60 pipeline steel at high CO_(2) wet gas and high flow rate condition with high Cl-,high speed wet gas loop system was used to conduct wet gas top of line corrosion simulation evaluation test of X60 pipeline steel.The wet top of line corrosion of X60 pipeline steel was evaluated by weight loss of samples before and after corrosion.The effects of different water content and different Cl-concentration on the wet top of line corrosion behavior of X60 pipeline steel were studied by means of scanning electron microscope(SEM),energy dispersive spectroscopy(EDS)and X-ray diffraction(XRD).Results showed that the salt particles were observed on the surface of X60 pipeline steel samples,indicating that there was scaling risk in a long service life under the conditions of 1 MPa CO_(2),10 m/s wet gas flow rate condition with 130000 mg/L and 170150 mg/L Cl^(-),water content of 0.03%and 0.05%.When the Cl^(-) content was 130000 mg/L,the high water content promoted the corrosion of X60 pipeline steel.When the Cl^(-) content reached 170150 mg/L,the corrosion weight loss of X60 pipeline steel decreased with the increasing of water content.

关 键 词：顶部腐蚀 湿气环路 X60管线钢 结垢 腐蚀失重 

分 类 号：TG172[金属学及工艺—金属表面处理]