摘要
将6063铝合金试样用10 g/L Ce(NO3)3.6H2O处理1 min^24 h,采用增重实验、盐雾试验和全浸腐蚀试验研究了铈转化膜的生长和耐蚀性能。结果表明,在初期试样增重随成膜时间线性增加,15 min后增重变缓,30 min后波动下降。转化膜的耐蚀性能受膜厚和裂纹联合控制,成膜时间在30 min内,随成膜时间增加,耐蚀能力增加;30 min后由于膜层开裂渐成主导控制因素,随成膜时间增加耐蚀性下降。
6063 aluminum alloy sheets were treated in 10g/L Ce（NO3）3 · 6H2O aqueous solution for 1min-24h, and the growth behavior and corrosion resistance of cerium conversion film were studied by mass gain test, neutral salt spray test （NSS）, and salt water test. The results showed that the mass gain of film increases with filming time proportionally in the initial stage of immersion, and then it increases slowly after 15 min and turn to decrease after 30 min. The corrosion resistance of the film is controlled by both the film thickness and the cracks. With the increasing of the treatment time, the corrosion resistance of the film increases within 30 min due to the increasing of the film thickness and decrease after 30 min because the cracking and flaking off gradually become dominant factor.
出处
《装备环境工程》
CAS
2009年第3期6-9,共4页
Equipment Environmental Engineering
基金
湖南科技大学博士基金(E50837)
关键词
铝合金
铈转化膜
生长行为
耐蚀性
aluminum alloy
cerium conversion film
growth process
corrosion resistance
