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首页> 外文期刊>International Journal of Electrochemical Science >Electrochemical behaviour of API 5L X52 Steel Samples Immersed in Sulphate Aqueous Solutions with Different pH
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Electrochemical behaviour of API 5L X52 Steel Samples Immersed in Sulphate Aqueous Solutions with Different pH

机译：API 5L X52钢样品浸入不同pH值的硫酸盐水溶液中的电化学行为

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摘要

Formation of anodic films was induced through application of potential pulses on the surface of API 5L X52 steel samples immersed in a 0.1 M H2SO4 aqueous solution with different pH set by adding NaOH. The formation mechanism was studied using the step potential technique to produce j-t plots, and the morphology and composition of the resulting films was characterized through SEM and EDX, respectively, and their passivating capacity was also electrochemically evaluated. It is shown that the anodic film was formed, in all cases, by means of nucleation and growth phenomena and that it cannot passivate the corrosion process. Furthermore, the nature of the films formed was also validated from a thermodynamic analysis based on the predominance zones diagram.
机译：通过将电位脉冲施加到API 5L X52钢样品的表面上，通过浸入具有不同pH值的0.1 M H2SO4水溶液中并添加NaOH来诱导阳极膜的形成。用步进电位技术研究了形成机理，生成j-t图，并通过SEM和EDX分别表征了所得薄膜的形貌和组成，并对它们的钝化能力进行了电化学评价。结果表明，在任何情况下，阳极膜都是通过成核和生长现象形成的，并且不能钝化腐蚀过程。此外，还基于优势区图通过热力学分析验证了形成的膜的性质。

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