碳化物型渗铬层在氯化钠溶液中的电化学性能

中国腐蚀与防护学报

1987, Vol. 7

Issue (3): 177-188

研究报告

本期目录 | 过刊浏览

碳化物型渗铬层在氯化钠溶液中的电化学性能

辛肇清;李佐豪;赵应英;肖以德

武汉材料保护研究所;武汉材料保护研究所;武汉材料保护研究所;武汉材料保护研究所

ELECTROCHEMICAL BEHAVIOUR OF CORROSION OF CARBIDE-TYPE CHROMIZED LAYER IN SODIUM CHLORIDE SOLUTION

Xin Zhaoqing Li Zuohao; Zhao Yingying and Xiao Yide(Wuhan Research Institute of Material Protection)

全文: PDF(1683 KB)

摘要: 用循环动电位极化等方法研究了45~#钢和T_(10)钢上的渗铬层在3％NaCl溶液中的电化学性能,为了对比,也用几种不锈钢进行了类似的研究。所有渗铬层的极化曲线均出现与不锈钢滞后环相反的导前现象。这种现象是渗铬试样具有特殊钝性的反映。这使其在各种浓度和pH值的NaCl溶液中均对点蚀和缝隙腐蚀不敏感。通过逐层研究渗铬层的电化学性能,证明渗铬试样的优异抗蚀性主要由于最外面的表层,其下部各层的抗蚀性随铬含量的降低而劣化。表层与其下部各层及基体间会构成电偶电池,并使后者被腐蚀。

Abstract：The electrochemical behaviour of chromized layer on 45 and T_(10) steels was investigated with cyclic potentiodynamic anode polarization and other methods in 3％ NaCl solution. Similar investigations were carried out on some stainless steels for the purpose of comparison. A precedence phenomenon was observed in all chromized layer.s polarization curves in contrast to the hysteresis loops observed in the case of stainless steels. This indicated that there existed a specific state of passivation ensuring the very high resistance of the chromized layer to pitting and crevice corrosion in all concentrations and pH range of sodium chloride solution. Layer-by-layer electrochemical studies showed that the corrosion resistance was excellent on the chromium-rich outmost layer and decreased gradually on inner layers due to the lower chromium concentrations. Besides, galvanic cell could be formed between the outermost layer and inner layers as well as between chromized layer and substrate to induce the final deterioration of substrate steels when exposed.

收稿日期: 1987-06-25

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引用本文:

辛肇清;李佐豪;赵应英;肖以德. 碳化物型渗铬层在氯化钠溶液中的电化学性能[J]. 中国腐蚀与防护学报, 1987, 7(3): 177-188.
. ELECTROCHEMICAL BEHAVIOUR OF CORROSION OF CARBIDE-TYPE CHROMIZED LAYER IN SODIUM CHLORIDE SOLUTION. J Chin Soc Corr Pro, 1987, 7(3): 177-188.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1987/V7/I3/177

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