Influence of K₂TiF₆ in electrolyte on characteristics of the microarc oxidation coating on aluminum alloy

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• 作者：Mingqi Tang^a ; ^b ; ^{tangmq400@163.com} ; Weiping Li^a ; Huicong Liu^a ; Liqun Zhu^a ; ^{zhulq@buaa.edu.cn}
• 关键词：Aluminum alloy ; Microarc oxidation ; Black MAO coating ; Abrasive resistance ; Corrosion resistance
• 刊名：Current Applied Physics
• 出版年：2012
• 期刊代码：15_15671739
• 类别：ph
• 出版时间：September, 2012
• 卷：12
• 期：5
• 页码：1259-1265
• 文件大小：1109 K

摘要

Black and gray microarc oxidation (MAO) coatings were prepared in a phosphate electrolyte with and without K₂TiF₆ on 2A70 aluminum alloy, respectively. Voltage-time curves were recorded during the MAO process. The effects of K₂TiF₆ on the morphology, composition, abrasive resistance and corrosion resistance of MAO coatings were investigated. The results showed that the MAO coating produced in the electrolyte with K₂TiF₆ was thicker, and more uniform than that produced in the electrolyte without K₂TiF₆. Ti was detected in the surface of the MAO coating formed in the electrolyte with K₂TiF₆. The results of abrasive resistance and corrosion resistance showed that the MAO coating formed in the electrolyte with K₂TiF₆ exhibited better abrasive resistance and corrosion resistance.