实海暴露防锈铝合金局部腐蚀敏感性研究

ABNORMAL CORROSION BEHAVIOR OF Al-Mg AND Al-Mn ALLOY IN SEAWATER

采用扫描电子显微镜 (SEM)、俄歇电子能谱 (AES)及电化学测试技术 ,对Al Mg和Al Mn两个系列的防锈铝合金在海水中的异常局部腐蚀行为进行研究 ,揭示与该异常行为相关的主要影响因素 ,包括环境和材料两大方面 .环境方面研究了海水中CO2 碳酸盐体系对合金腐蚀电位的影响及由此带来的腐蚀行为变化 ;材料方面主要考察了合金的组织结构、夹杂物及表面状态的影响 .

Abnormal corrosion behavior of Al\|Mg and Al\|Mn alloys exposed to various sea areas has been studied by SEM, AES and electrochemical measuring techniques. The main affecting factors related to the abnormal corrosion behaviors, including those of environment and materials, were investigated. The results showed that the change of corrosion behaviors was related to the corrosion potential shift, which was affected by the parameters of the carbon dioxide\|carbonate system. The effect of the microstructure , inclusions and surface condition of the alloys on corrosion behavior was also investigated.