摘要
利用Cu/Al电偶对模拟LY12铝合金在铈盐溶液中的成膜过程.电偶对在铈盐溶液中,电偶电流由开始的 0.08mA降低为 0.005mA,表明有阻滞腐蚀的作用出现;电偶电位随时间负移,这是腐蚀反应中阴极过程受阻滞的表现.浸泡8h后,Cu片上形成了一层黄色膜层.SEM,EDX分析表明,Cu片上形成了富含铈的裂纹状膜层.
A Cu/Al galvanic couple was used to simulate the electrochemical behavior of LY12 aluminum alloy in cerium salt solutions. The galvanic current decreased with time from 0.08 mV to 0.005 mV after immersion in the solutions, which indicates that the corrosion was inhibited. The galvanic potential moved negatively, which shows the cerium film inhibits the cathodic reaction. After 8 h of immersion, a yellow layer was formed on the copper of the galvanic couple. SEM, EDX anslyses show that the layer has a dry mud appearance and contains a mess of Ce.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2002年第5期525-528,共4页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助课题(No.59771067)
