An investigation of the corrosion behavior of Al₂O₃-based ceramic composite coatings in dilute HCl solution

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• 作者：Yan ; Dianran ; He ; Jining ; Li ; Xiangzhi ; Liu ; Yangaia ; Zhang ; Jianxin ; Ding ; Huili
• 关键词：Ceramic coating ; Composite coating ; Plasma spraying ; Corrosion resistance
• 刊名：Surface and Coatings Technology
• 出版年：2001
• 出版时间：June 4, 2001
• 年：2001
• 卷：141
• 期：1
• 页码：1-6
• 全文大小：1.81 M

文摘

In this paper, the corrosion behavior of Al₂O₃–SiO₂, Al₂O₃–TiO₂ and Al₂O₃–SiO₂–TiO₂ ceramic composite coatings in boiling 1 N HCl solution is investigated. It is shown that the addition of 3 % SiO₂ to the base spraying powder of Al₂O₃ increases porosity in the coatings and causes deterioration in their corrosion resistance. Adding 13 % TiO₂ to Al₂O₃ improves the anti-corrosion property of the ceramic coating due to a reduction in porosity. The connected porosity in the Al₂O₃-based ceramic composite coatings rises with the open porosity and is independent of the density of the coating.