A3钢在弹性形变范围内的应变电极行为  

STRAIN ELECTRODE OF A3 STEEL UNDER ELASTIC DEFORMATION

作　　者：王景茹[1] 朱立群[1] 饶思贤[1] 张峥[1] 钟群鹏[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院,北京100083

出　　处：《中国腐蚀与防护学报》2005年第4期226-231,共6页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点基础研究发展规划资助项目(G1999065010)

摘　　要：以A3钢为例,研究了外加力场对不同腐蚀体系电化学行为的影响.探讨了外加力场对腐蚀速度的作用,认为外加力场并不会影响扩散过程的腐蚀速度,但是会加速活化过程以及混合控制过程的腐蚀速度.在扫描电镜下观察了受外力和腐蚀交互作用之后的金属表面形貌.并提出对局部腐蚀严重的腐蚀体系需要控制外加力场,以免造成局部应力集中过大,萌生裂纹的现象.The behaviors of strain electrode of A3 steel in different solutions were studied. The effects of loading on the corrosive rate of A3 steel in different solutions were investigated. The results showed that the applied load did not affect the corrosion rate of diffusion course but accelerated the corrosion rate of activation course and mix course. The surfaces after tests were observed using scanning electron microscope（SEM）. This study concluded that for the corrosion system with serious localized corrosion the applied load should be controlled to avoid the crack initiated by the significant stress concentration.

关 键 词：腐蚀 力学-化学效应 阳极极化 应力集中 裂纹 

分 类 号：TG172.9[金属学及工艺—金属表面处理]