赵丹丹,王志强,孙瑞雪,陈克正

• 1:青岛科技大学材料科学与工程学院

摘要(Abstract)：

采用化学转化处理的方法,在AZ91D镁合金基体表面制备锡酸盐转化膜。重点研究了乙二胺四乙酸(EDTA)对转化膜形貌及相组成的影响。采用极化曲线及交流阻抗对转化膜的耐蚀性进行了测试。结果表明,锡酸盐转化膜由细小的球形颗粒堆积而成,在转化液中加入EDTA后获得的转化膜的致密性大幅度提高、裂纹数量明显减少,膜层平均厚度约为2~3μm,且与基体结合较好。膜层的主要成分为Mg Sn O3·3H2O晶体。加入EDTA后获得的转化膜的耐腐蚀性能较空白基体有明显的提高。

关键词(KeyWords)： 镁合金;EDTA;锡酸盐转化膜;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 赵丹丹,王志强,孙瑞雪,陈克正

DOI: 10.13289/j.issn.1009-6264.2014.s2.035

参考文献(References)：

• [1]曾荣昌,兰自栋,陈君,等.镁合金表面化学转化膜的研究进展[J].中国有色金属学报,2009,19(3):397-404.ZENG Rong-chang,LAN Zi-dong,CHEN Jun,et al.Progress of chemical conversion coatings on magnesium alloys[J].The Chinese Journal of Nonferrous Metals,2009,19(3):397-404.
• [2]Bagala P,Lamastra F R,Kaciulis S,et al.Cera/stannate multilayer coatings on AZ91D Mg alloy[J].Surface&Coatings Technology,2012,206:4855-4863.
• [3]Liu X L,Zhang T,Shao Y W,et al.In-stiu study of the formation process of stannate conversion coatings on AZ91D magnesium alloy using electrochemical noise[J].Corrosion Science,2010,52:892-900.
• [4]Hamdy A S.The effect of surface modification and stannate concentration on the corrosion protection performance of magnesium alloys[J].Surface&Coatings Technology,2008,203:240-249.
• [5]Hamdy A S,Butt D P.Novel smart stannate based coatings of self-healing functionality for AZ91D magnesium alloy[J].Electrochimical Acta,2013,97:296-303.
• [6]Yang L H,Zhang M L,Li J Q,et al.Stannate conversion coatings on Mg-8Li alloy[J].Journal of Alloys and Compounds,2009,471:197-200.
• [7]霍宏伟,李华为,陈庆阳,等.AZ91D镁合金锡酸盐转化膜形成机理和腐蚀行为研究[J].表面技术,2007,36(5):1-3.HUO Hong-wei,LI Hua-wei,CHEN Qing-yang,et al.Investigation of corrosion behavior and formation mechanism of stannate conversion film on AZ91D magnesium alloy[J].Surface Technology,2007,36(5):1-3.
• [8]李亚娟,梁平,秦华,等.酒石酸钾钠对镁合金表面磷化膜耐蚀性的影响[J].腐蚀与防护,2013,34(1):26-29.LI Ya-juan,LIANG Ping,QIN Hua,et al.Effect of potassium sodium tartrate on corrosion resistance of phosphating film on magnesium alloy[J].Corrosion&Protection,2013,34(1):26-29.
• [9]Choi Y,Salman S,Kuroda K,et al.Synergistic corrosion protection for AZ31 Mg alloy by anodizing and stannate post-sealing treatments[J].Electrochimica Acta,2013,97:313-319.
• [10]Lee Y L,Chu Y R,Chen F J,et al.Mechanism of the formation of stannate and cerium conversion coatings on AZ91D magnesium alloys[J].Applied Surface Science,2013,276:578-585.

文章评论(Comment)：