中国石油大学学报（自然科学版）2012，Vol.36Issue(4)：144-148,5.DOI:10.3969/j.issn.1673-5005.2012.04.027
阳极溶解型应力腐蚀点蚀演化的能量原理
Energy principle for pitting evolution during anodic dissolution stress corrosion
摘要
Abstract
As an irreversible thermodynamics process, the development and evolution of pitting for anodic dissolution stress corrosion is controlled by the combined action of surface energy, elastic energy and electrochemical energy stored in the solid. Based on energy principle, the exploratory study of energy issues for stress corrosion pitting evolution was carried on. A two-variable semi-ellipsoid model was proposed to describe the pitting evolution, and the function of pitting shape parameter was derived in the process of stress corrosion. At the same time, the effects of far-field stress and other parameters on the pit-ting shape parameter and the variation of system energy were discussed. The results show that the pitting morphology initially appears as a hemisphere and evolves into a semi-ellipsoid gradually. The evolution morphology of pitting is controlled by the combined action of strain energy and surface energy stored in the system. The strain energy can accelerate ihe morphology pitting evolution, while the surface energy resists it. At the same time, the far-field stress has a significant influence-on the variation of thermodynamic potential.关键词
阳极溶解/应力腐蚀/点蚀演化/形状参数/能量原理Key words
anodic dissolution/ stress corrosion/ pitting evolution/ shape parameter/ energy principle分类
数理科学引用本文复制引用
韩忠英,薛世峰,黄小光..阳极溶解型应力腐蚀点蚀演化的能量原理[J].中国石油大学学报（自然科学版）,2012,36(4):144-148,5.基金项目
国家自然科学基金项目(10772116) （10772116）
