15Mn钢动态阳极溶解电流及其在腐蚀疲劳中的作用

中国腐蚀与防护学报

1990, Vol. 10

Issue (4): 378-382

研究报告

本期目录 | 过刊浏览

15Mn钢动态阳极溶解电流及其在腐蚀疲劳中的作用

邢志强;宋余九;涂铭旌

北京工业大学;西安交通大学;成都科技大学

DYNAMIC ANODIC CURRENT DENSITY AND ITS EFFECT ON CF OF 15Mn STEEL IN AQUEOUS ENVIRONMENT

Xing Zhiqiang (Beijing Polytechnic University)Song Yujiu (Xi'an Jiaotong University)Tu Mingjing (Chengdu University of Science and Technology)

全文: PDF(370 KB)

摘要: <正> 一、前言明确阳极溶解和氢脆在裂纹扩展中的作用是认识环境敏惑开裂机制的关键。裂纹尖端为局部高应变状态,微区内交换电流密度大大高于周围基体,但目前尚无方法对裂纹尖端腐蚀电流密度进行直接测定。为此,本工作采用了一种摸拟方法,通过测量加载过程中阳极溶解电流与应变及应变速率的关系,并结合裂纹扩展中裂纹尖端应变场的有限元分析,对裂纹尖端阳极电流密度和因阳极溶解导致的裂纹扩展速率增量进行计算,得到了很好的结果。

Abstract：A research technique was developed to investigate the variation of anodic current density in aqueous environment,The theoretical analysis testified that the anodic current depended on the strain and strain rate for a regular material-environment,Testing results revealed that the anodic current density of 15Mn steel wire increased with increasing strain and strain rate.Moreover fihe increment of corrosion fatigue crack growth rate induced by anodic dissolution was computed to deter- mine the corrosion fatigue mechanism of mild steels in aqueous environ- ments,The calculation proved that in the early stage of crack growth the anodic dissolution had notable influence on crack growth and the corrosion fatigue mechanism was dissolution-assisted-fatigue,In the second stage of crack growth,the corrosion fatigue mechanism transf- ered to hydrogen-assisted-cracking.

收稿日期: 1990-08-25

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引用本文:

邢志强;宋余九;涂铭旌. 15Mn钢动态阳极溶解电流及其在腐蚀疲劳中的作用[J]. 中国腐蚀与防护学报, 1990, 10(4): 378-382.
. DYNAMIC ANODIC CURRENT DENSITY AND ITS EFFECT ON CF OF 15Mn STEEL IN AQUEOUS ENVIRONMENT. J Chin Soc Corr Pro, 1990, 10(4): 378-382.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1990/V10/I4/378

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