304不锈钢在钻井废弃液中的腐蚀行为

发布时间：2018-05-17 11:49

本文选题：不锈钢 + 腐蚀　；参考：《材料保护》2016年08期

【摘要】：目前针对钻井废弃液中材料的腐蚀研究尚属空白。采用浸泡腐蚀试验、电化学阻抗谱(EIS)、动态极化曲线、扫描电镜(SEM)研究了304不锈钢在钻井废弃液介质中浸泡不同时间后的腐蚀情况。结果表明:浸泡腐蚀初期(5~10 d),试样的腐蚀电流密度显著增加,对应的自腐蚀电位和极化电阻减小,耐腐蚀性能变差;而随着浸泡时间的延长(10~30 d),腐蚀电流密度减小,极化电阻增大,腐蚀减缓;浸泡30~90 d期间,极化电阻、自腐蚀电位显著增加;整个浸泡腐蚀期间试样表面的保护膜层处于生成-破坏-自修复的动态变化中,这使得304不锈钢的耐腐蚀性能较好,浸泡腐蚀90 d后的试样表面生成了较为均匀的保护膜。
[Abstract]:At present, the research on corrosion of materials in waste drilling fluid is still blank. Immersion corrosion test, electrochemical impedance spectroscopy (EIS), dynamic polarization curve and scanning electron microscope (SEM) were used to study the corrosion of 304 stainless steel after immersion in drilling waste liquid for different time. The results show that the corrosion current density of the sample increases significantly, the corresponding corrosion potential and polarization resistance decrease, and the corrosion resistance becomes poor, while the corrosion current density decreases with the prolongation of immersion time. The polarization resistance increased and the corrosion slowed down, the polarization resistance and corrosion potential increased significantly during 30 ~ 90 d immersion, and the protective film layer on the surface of the sample was in the dynamic change of formation, failure and self-repair during the whole immersion corrosion period. The corrosion resistance of 304 stainless steel was better than that of stainless steel, and a uniform protective film was formed on the surface of 304 stainless steel after 90 days of immersion corrosion.
【作者单位】：上海海事大学物流工程学院;上海海事大学海洋材料科学与工程学院;上海海事大学商船学院;
【基金】：上海市科委创新行动计划项目《海上平台钻井污水的深度处理及回用技术》(14DZ1205302) 高等学校博士学科点专项科研基金(20113121110001)资助
【分类号】：TG172

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