摘要
为了全面取代铬酸盐,开发无污染铝合金防蚀处理新工艺,采用了正交试验得出以Ce(NO3)3为主盐的铝合金富铈转化膜工艺,膜的耐蚀性略高于铬酸盐处理膜,比铝合金的自然氧化膜耐蚀性高出约20倍,并以成膜均匀性、溶液稳定性和在0.1mol/LNaCl溶液中的极化阻力Rp为依据,研究了适合工业化应用的工艺范围,对几种富铈转化膜工艺进行了比较研究,结果表明,氧化剂的选择及其在溶液中的稳定性对成膜性能起重要作用。
The rare earth conversion film with Ce(NO\-3)\-3 as the main salt, environmental friendly coating technique for aluminum alloys, was obtained by orthogonal experiments to substitute chromate treatment. The corrosion resistance of cerium\|rich conversion coating was slightly higher than that by chromate treatment and about 20 times as high as natural oxide film of aluminum alloy. Several cerium\|rich conversion coating technique were compared for industrial application according to the film homogeneity, solution stability and polarization resistance Rp in the solution of 0.1 mol/L NaCl. The results showed that the choice of oxidizer and its stability in solution played an important role in the properties of coating.
出处
《材料保护》
CAS
CSCD
北大核心
2003年第8期33-36,共4页
Materials Protection
关键词
铝合金
稀土转化膜
防蚀
aluminum alloy
rare earth conversion coating
corrosion protection
