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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Dissolved Oxygen on Pitting Corrosion Behavior of Low-Alloy Steel under Hydrostatic Pressure
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Effect of Dissolved Oxygen on Pitting Corrosion Behavior of Low-Alloy Steel under Hydrostatic Pressure

机译：静水压力下溶解氧对低合金钢点蚀行为的影响

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摘要

Effect of dissolved oxygen on pitting corrosion behavior of low-alloy steel under hydrostatic pressure inneutral 3.5 wt.% NaCl solution was investigated by scanning electron microscope (SEM), 3-D measuringmicroscope and so on. The results show that the combined effect of hydrostatic pressure and dissolvedoxygen increases the overall growing rate of corrosion pits and causes deeper corrosion pits but decreasestheir sizes in the horizontal direction. Electrochemical measurement results reveal that dissolved oxygendominate the corrosion kinetics of low-alloy steel in the environment containing high hydrostaticpressure and high dissolved oxygen by accelerating cathodic process, slowing down the anodic processand promoting open circuit potential (OCP). Consequently, the increased charge transfer process makesthe pits have a larger volume and depth. Meanwhile, the decreased initial potential energy differencebased on energy theory calculation at the initiation site by dissolved oxygen possibly inhibits the pittinggrowth in the horizontal direction.
机译：通过扫描电子显微镜（SEM），3-D测量显微镜等研究了静水中性3.5 wt。％NaCl溶液中溶解氧对低合金钢点蚀性能的影响。结果表明，静水压力和溶解氧的共同作用提高了腐蚀坑的整体生长速率，并导致腐蚀坑更深，但在水平方向上尺寸减小。电化学测量结果表明，在高静水压和高溶解氧的环境中，溶解氧通过加速阴极过程，减缓阳极过程和促进开路电位（OCP）主导了低合金钢的腐蚀动力学。因此，增加的电荷转移过程使凹坑具有更大的体积和深度。同时，基于能量理论计算的起始氧在起始位置的溶解氧降低，可能会抑制水平方向上的点蚀生长。

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