元素硫和硫化物对油气工业中油管及管状部件用Cr-Mo低合金钢腐蚀行为的影响
Effect of Elemental Sulfur and Sulfide on the Corrosion Behavior of Cr-Mo Low Alloy Steel for Tubing and Tubular Components in Oil and Gas Industry.
作者信息
Khaksar Ladan, Shirokoff John
机构信息
Department of Mechanical Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada.
Department of Process Engineering, Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada.
出版信息
Materials (Basel). 2017 Apr 20;10(4):430. doi: 10.3390/ma10040430.
The chemical degradation of alloy components in sulfur-containing environments is a major concern in oil and gas production. This paper discusses the effect of elemental sulfur and its simplest anion, sulfide, on the corrosion of Cr-Mo alloy steel at pH 2 and 5 during 10, 20 and 30 h immersion in two different solutions. 4130 Cr-Mo alloy steel is widely used as tubing and tubular components in sour services. According to the previous research in aqueous conditions, contact of solid sulfur with alloy steel can initiate catastrophic corrosion problems. The corrosion behavior was monitored by the potentiodynamic polarization technique during the experiments. Energy dispersive X-ray spectroscopy (EDS) and scanning electron microscopy (SEM) have been applied to characterize the corrosion product layers after each experiment. The results show that under the same experimental conditions, the corrosion resistance of Cr-Mo alloy in the presence of elemental sulfur is significantly lower than its resistance in the presence of sulfide ions.
在含硫环境中合金部件的化学降解是石油和天然气生产中的一个主要问题。本文讨论了元素硫及其最简单的阴离子硫化物，在pH值为2和5的条件下，于两种不同溶液中浸泡10、20和30小时期间，对Cr-Mo合金钢腐蚀的影响。4130 Cr-Mo合金钢广泛用作含硫环境中的油管和管状部件。根据先前在水性条件下的研究，固态硫与合金钢接触会引发灾难性的腐蚀问题。实验过程中通过动电位极化技术监测腐蚀行为。每次实验后均应用能量色散X射线光谱（EDS）和扫描电子显微镜（SEM）对腐蚀产物层进行表征。结果表明，在相同实验条件下，Cr-Mo合金在元素硫存在下的耐腐蚀性明显低于其在硫化物离子存在下的耐腐蚀性。
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