Stress corrosion cracking relation with dezincification layer-induced stress |
| |
Authors: | Xianzhong Guo Kewei Gao Lijie Qiao Wuyang Chu |
| |
Affiliation: | (1) the Department of Materials Physics, University of Science and Technology Beijing, 100083 Beijing, People’s Republic of China |
| |
Abstract: | Brass foil with a protective layer formed on one side was deflected during corrosion in an ammonia solution under various
applied potentials, and then corrosion-induced stress generated at brass/dezincification layer under different potentials
could be measured. At the same time, susceptibility to stress corrosion cracking (SCC) of brass in the ammonia solution under
various applied potentials was measured by using a single-edge notched specimen. At open-circuit potential, both corrosion-induced
tensile stress and susceptibility to SCC (I
σ) had a maximum value. Both tensile stress σ
p and susceptibility I
σ decreased slightly with decreasing potential under anodic polarization, but reduced steeply with a decrease in potential
under cathodic polarization. At the cathodic potential of − 500 mVSCE, corrosioninduced stress became compressive because of the copper-plating layer; correspondingly, susceptibility to SCC was
zero. Therefore, the variation of SCC susceptibility with potential is consistent with that of the corrosion-induced additive
stress. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|