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首页> 外文期刊>International Journal of Electrochemical Science >The Electrochemical Behavior of 15-5PH Stainless Steel in Acidic Solutions
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The Electrochemical Behavior of 15-5PH Stainless Steel in Acidic Solutions

机译：15-5PH不锈钢在酸性溶液中的电化学行为

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In this paper, the potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) of- 15-5PH stainless steel were measured in the 0.5M Na2SO4 acid solution with various pH values and Clconcentrations.The characteristics of surface passive film formed under different corrosive conditionswere analyzed using X-ray photoelectron spectroscopy (XPS). It is found that all the polarizationcurves of 15-5PH steel present passivity in the testing acid solution, and the corrosion current densitychange from 16.032A to 1.967A with the pH value increasing between 1and 5. In contrast to the- current performance, the impedance changed oppositely. With addition of Cl the pits initiated on the- steel electrode and the pitting potential was reduced by increasing concentration of Cl . Moreover, theoxides and hydroxides of Fe, Cr, Ni and Cu are the primary components of the passive film.
机译：本文在0.5M Na2SO4酸性溶液中，在不同pH值和Cl浓度下，测定了15-15PH不锈钢的电动力极化和电化学阻抗谱，并分析了在不同腐蚀条件下形成的表面钝化膜的特性。 X射线光电子能谱（XPS）。发现15-5PH钢的所有极化曲线在测试酸溶液中均具有钝化性，并且随着pH值在1至5之间增加，腐蚀电流密度从16.032A变为1.967A。与电流性能相比，阻抗相反地​​改变了。在添加Cl的情况下，钢电极上开始产生蚀坑，并且通过增加Cl的浓度降低了蚀斑电位。此外，Fe，Cr，Ni和Cu的氧化物和氢氧化物是钝化膜的主要成分。

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