30CrMnSi钢应力腐蚀裂纹内的电化学行为

中国腐蚀与防护学报

1988, Vol. 8

Issue (2): 141-147

研究报告

本期目录 | 过刊浏览

30CrMnSi钢应力腐蚀裂纹内的电化学行为

何业东;余宗吉

北京航空学院;教师北京钢铁学院博士研究生;北京航空学院;1984年大学毕业生厦门大学硕士研究生

THE ELECTROCHEMICAL BEHAVIOR WITHIN SCC CRACKS OF 30CrMnSi STEEL

He Yedong Yu Zongji (Beijintt Institute of Aeronautics & Astronautics)

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摘要: <正> 一、前言应力腐蚀裂纹内的电化学行为与裂纹起裂以及裂纹扩展动力学之间的关系,目前仍然是研究的薄弱环节。其主要原因是由于应力腐蚀裂纹很细而且裂纹内溶液非常少,使得裂纹内尤其是裂纹尖端区域的电化学参数很难测试。本文作者等在前人方法的基础上提出了在液体石蜡保护下测试裂纹内电位、pH值、Cl~-浓度分布的新方法。本工作在该方法的基础上又作了改进,并对30CrMnSi钢应力腐蚀裂纹内的电化学行为进行了研究。

Abstract：The electrochemical behavior within the SCC cracks of 30CrMnSi steel in 3.5％NaCl solution or in 5％K_2Cr_2O_7+0.1％NaCl solution was studied. The distribution of potential, pH value and Cl~- concentration under different polarized potentials was measured. It was found that the crack tip potential versus pH value and the potential-versus Cl~- concentration relationships are both linear. Based on the electrochemical model of microcell and multi-electrode system, the electrochemical difference between corrosion crack and crevice was explained and the correlation between electrochemical behavior within the crack and the cracking sensitivity was established.

收稿日期: 1988-04-25

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引用本文:

何业东;余宗吉. 30CrMnSi钢应力腐蚀裂纹内的电化学行为[J]. 中国腐蚀与防护学报, 1988, 8(2): 141-147.
. THE ELECTROCHEMICAL BEHAVIOR WITHIN SCC CRACKS OF 30CrMnSi STEEL. J Chin Soc Corr Pro, 1988, 8(2): 141-147.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1988/V8/I2/141

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