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首页> 外文期刊>International Journal of Electrochemical Science >The Electrochemical Characteristics of Cr30Mo2 Ultra Pure Ferritic Stainless Steel in NaCl Solutions at Different Temperatures
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The Electrochemical Characteristics of Cr30Mo2 Ultra Pure Ferritic Stainless Steel in NaCl Solutions at Different Temperatures

机译：Cr30Mo2超纯铁素体不锈钢在NaCl溶液中不同温度下的电化学特性

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摘要

The electrochemical characteristics of Cr30Mo2 ultra pure ferritic stainless steel in 0.01-2 M NaClsolutions at different temperatures (25-90 C) had been investigated using different electrochemicaltechniques of potentiodynamic polarization, electrochemical impedance spectroscopy, capacitancemeasurements (Mottchottky approach) and potentiostatic polarization measurements. The resultsrevealed that the pitting corrosion behavior of this stainless steel was found to be dependant on the-temperature and chloride concentration of the solution. As the temperature and Cl concentration wereincreased, the pitting potentials of the stainless steel shifted to negative direction, the impedances ofpassive films decreased and the donor densities (ND) in oxide films calculated from the Mott-Schottky21 -3 plots increased in the range of 1.6 - 7 10 cm . Besides, the incubation time of pitting corrosion ofCr30Mo2 stainless steel shortened with the increase of temperature. Combining with micrographs ofpits, it was recognized that the pitting corrosion resistance of Cr30Mo2 stainless steel declined in theconcentrated NaCl solution at higher temperature.
机译：Cr30Mo2超纯铁素体不锈钢在0.01-2 M NaCl溶液中于不同温度（25-90 C）下的电化学特性已通过不同的电动力学极化，电化学阻抗谱，电容测量（Mottchottky方法）和恒电极化测量电化学技术进行了研究。结果表明，发现这种不锈钢的点腐蚀行为取决于溶液的温度和氯化物浓度。随着温度和Cl浓度的增加，不锈钢的点蚀电位向负方向移动，钝化膜的阻抗降低，并且根据Mott-Schottky21 -3图计算得到的氧化膜的施主密度（ND）在1.6的范围内增加-7 10厘米。此外，随着温度的升高，Cr30Mo2不锈钢的点蚀腐蚀的保温时间缩短。结合显微照片，可以看出，在较高的NaCl浓度下，Cr30Mo2不锈钢的抗点蚀性能下降。

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