Improvement of protection performance of Mg-rich epoxy coating on AZ91D magnesium alloy by DC anodic oxidation
Improvement of protection performance of Mg-rich epoxy coating on AZ91D magnesium alloy by DC anodic oxidation
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直流阳极氧化提高AZ91D镁合金富镁环氧涂层防护性能
DOI：
10.1016/j.porgcoat.2016.11.001
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发表时间：
2017-03-01
影响因子：
6.6
通讯作者：
Zheng, Chuanbo
中科院分区：
文献类型：
--
作者：
Lu, Xiangyu;Feng, Xingguo;Zheng, Chuanbo
采用简单直流阳极氧化法在AZ91D镁合金表面制备阳极氧化膜。研究了阳极氧化膜对镁合金富镁底漆防护性能的影响。除了膜的阻隔效果之外，膜中的孔增强了底漆和膜之间的机械互锁。这使得底漆在AZ91D基材上的粘附性通过膜显著增加。电化学测试和划痕测试结果表明，该膜显著延长了底漆的使用寿命，复合涂层系统为合金提供了优异的保护。探讨了涂膜对底漆防护性能的影响机理。(C)© 2016 Elsevier B.V.版权所有。
An anodic oxidation film was fabricated on an AZ91D magnesium (Mg) alloy via simple direct current anodic oxidation. The effects of the anodic oxidation film on the protection performance of a Mg-rich primer on this alloy, were determined. In addition to the barrier effect of the films, the holes in the film enhanced the mechanical interlocking between the primer and the film. This yielded a significant increase in the adhesion of the primer, on the AZ91D substrate by the film. The results of electrochemical measurements and scratch testing suggested that the film significantly prolongs the lifetime of the primer and the composite coating system provides excellent protection for the alloy. The mechanisms governing the effect of the film on the protection performance of the primer were discussed. (C) 2016 Elsevier B.V. All rights reserved.