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首页> 外文期刊>Journal of Materials Engineering and Performance >Corrosion Behavior of 35CrMn and Q235 Steel in Simulated Acid Rain Conditions
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Corrosion Behavior of 35CrMn and Q235 Steel in Simulated Acid Rain Conditions

机译：模拟酸雨条件下35CrMn和Q235钢的腐蚀行为

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摘要

Effects of pH value, chloride ion concentration and alternation of wetting and drying time in acid rain on the corrosion of 35CrMn and Q235 steel were investigated through the measurement of polarization curves, electrochemical impedance spectroscopy, x-ray diffraction, and quantum mechanical calculations. The corrosion rate of 35CrMn and Q235 steel increased with decreasing pH values of the simulated acid rain, whereas the corrosion potential of 35CrMn and Q235 steel became more negative. The impedance became higher and the corrosion rate decreased with increasing test time. The dissolution rate of samples increased with chloride ion concentration. Results suggested that the corrosion rate of 35CrMn steel was obviously lower than that of Q235 steel for a more compact rust, α-FeOOH. Quantum chemical calculations further revealed that the increase in corrosion rate of the steel resulted from pitting corrosion caused by the corrosive chloride ion.
机译：通过极化曲线的测量，电化学阻抗谱，X射线衍射和量子力学计算，研究了pH值，氯离子浓度以及酸雨中润湿和干燥时间的交替对35CrMn和Q235钢腐蚀的影响。 35CrMn和Q235钢的腐蚀速率随着模拟酸雨的pH值的降低而增加，而35CrMn和Q235钢的腐蚀电位变得更负。随着测试时间的增加，阻抗变高，腐蚀速率降低。样品的溶解速度随氯离子浓度的增加而增加。结果表明，对于更致密的锈蚀α-FeO​​OH，35CrMn钢的腐蚀速率明显低于Q235钢。量子化学计算进一步表明，钢的腐蚀速率增加是由于腐蚀性氯离子引起的点蚀。

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