三乙醇胺对镁合金氧化膜层性能和微观结构的影响

系统的研究了三乙醇胺对镁合金阳极氧化过程、氧化膜层的耐蚀性能和微观结构的影响.结果表明:三乙醇胺可以加快氧化反应进行的速度,使表面孔隙变小,提高表面光洁度;三乙醇胺的加入使氧化膜层的Al含量增加,Si、P含量减少,说明基体参与氧化反应增加,溶液离子参与氧化反应减少;加入三乙醇胺的电解液制备的氧化膜的耐蚀性优于无三乙醇胺的电解液制备的氧化膜的耐蚀性,但耐蚀性能的增加与三乙醇胺的加入量不成正比.

Effects of Organic Solution on Performance and Microstructure of Oxide Film of Magnesium Alloy

The effects of triethanolamine on anodic oxidation process, corrosion resistance of oxide film and microstructure of magnesium alloys are systematically studied. The results indicate that triethanolamine can improve the oxidation speed of magnesium alloy , make surface holes became smaller and improve surface smooth finish. Triethanolamine can increase Al content of oxide film and reduce Si and P content . These indicate that more basic material join oxidation reaction and less solution ion join oxidation reaction. The corrosion resistance of the film prepared in solution with triethanolamine is better than that without triethanolamine. But the content of triethanolamine can not decide the corrosion resistance.