铝合金化学氧化封闭后膜层耐蚀性比较
《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]
卷:
期数:
2013年11
页码:
5-8
栏目:
出版日期:
2019-06-08
- Title:
- Comparison of Corrosion Resistance of Chemical Oxide Sealing Films on Aluminum Alloy
- 摘要:
- 利用极化曲线测试及膜质量增加评价了勃姆石溶胶、硝酸铈溶液、Ni2+-Co2+溶液及Co2+-三乙醇胺溶液封闭对铝合金化学氧化膜在3.5%的NaCl水溶液中的耐蚀性能。实验结果表明,采用Ni2+-Co2+溶液封闭的铝合金化学氧化膜具有较好的耐酸碱腐蚀能力,稀土铈溶液封闭膜在酸性条件下、溶胶在中性及碱性条件下具有较好的耐蚀性,Co2+-三乙醇胺溶液中的封闭膜耐蚀性较差。
- Abstract:
- Effects of different sealing methods using boehmite sol,cerous nitrate solution,Ni2+ -Co2+ solution and Co2+-triethanolamine solution on the corrosion resistance of chemical oxide films on aluminum alloy in 3.5% of NaCl solution were evaluated by electrochemical polarization curve and weight increase method.The results revealed that films sealed in Ni2+-Co2+ solution provides relatively higher corrosion resistance both in acidic and alkaline solutions,films sealed in cerous nitrate solution possessed preferable corrosion resistance in acidic solution while films sealed in boehmite sol possessed preferable corrosion resistance under neutral and alkaline condition,but films sealed in Co2+-triethanolamine showed poor corrosion resistance.
更新日期/Last Update:
2019-06-07