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首页> 外文期刊>International Journal of Electrochemical Science >The Dependence of Electrochemical Behaviors on the Corrosion Products of L360NCS Steel Exposed to Wet H2S Environments
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The Dependence of Electrochemical Behaviors on the Corrosion Products of L360NCS Steel Exposed to Wet H2S Environments

机译：电化学行为对暴露在潮湿H2S环境下的L360NCS钢腐蚀产物的依赖性

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The corrosion behavior and electrochemical characteristics of carbon steel in H2S environment wereinvestigated in this paper under different temperatures. Results showed that the corrosion rate of steelincreased first from 0.413 mm/a to 0.889 mm/a with the temperature changed from 25 to 75 C, andthen decreased to 0.298 mm/a with the temperature increased to 90 C. Electrochemical impedancespectroscopy (EIS) showed that the reaction presented charge-transfer and diffusion-controlledmechanism when temperature ranged from 25 to 75 C; while at 90 C, the result showed a charge- transfer reaction. The polarization curve revealed the linear polarization resistance (LPR) decreasedfirst and then increased as temperature rose. The results related to the reduced solubility of H2S inwater and enhanced reaction rate with increased temperature. Mackinawite was the main corrosionproduct, and the ratio of mackinawite increased while the grain size of corrosion products decreasedwith the increase of temperature.
机译：本文研究了碳钢在不同温度下在硫化氢环境下的腐蚀行为和电化学特性。结果表明，当温度从25升高到75℃时，钢的腐蚀速率首先从0.413 mm / a增加到0.889 mm / a，然后随着温度升高到90 C而降低到0.298 mm / a。电化学阻抗谱（EIS）显示当温度为25至75℃时，该反应表现出电荷转移和扩散控制的机理;在90℃下，结果显示出电荷转移反应。极化曲线显示线性极化电阻（LPR）先随温度上升而下降，然后上升。结果与H 2 S在水中的溶解度降低和温度升高时反应速率提高有关。马氏体是主要的腐蚀产物，随温度的升高，马氏体的比例增加而腐蚀产物的晶粒尺寸减小。

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