Performance of Aluminum Triphosphate and Ceria Modified Mg-rich Epoxy Coating on AZ91D Magnesium Alloy

Q4 Chemical Engineering

腐蚀科学与防护技术 Pub Date : 2015-02-14 DOI:10.11903/1002.6495.2014.057

Yujing Fan, Y. Zuo, Xuhui Zhao, Yuming Tang

引用次数: 0

Abstract

A corrosion resistant coating for AZ91 D magnesium alloy was prepared by adding pure magnesium particles, aluminium triphosphate(SAP) and ceria in an epoxy coating. The performance of the coating in 3%Na Cl solution was studied with methods of Machu test, electrochemical impedance measurement and scanning electron microscope. The results show that the Mg-rich epoxy coating failed and the magnesium substrate was corroded after immersion for about 2000 h,while no corrosion was observed beneath the coating with SAP and ceria addition after immersion for 4448 h. Distinctly the added SAP and ceria can decrease the activity of magnesium particles in the Mg-rich epoxy and thereby prolong the life time of the coating. On the other hand, the compactness and the barrier property of the coating are improved as well.

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AZ91D镁合金上三磷酸铝和铈改性富镁环氧涂层的性能

在环氧涂层中加入纯镁颗粒、三磷酸铝(SAP)和二氧化铈，制备了az91d镁合金的耐腐蚀涂层。采用马氏试验、电化学阻抗测量和扫描电镜等方法研究了涂层在3%氯化钠溶液中的性能。结果表明:浸泡约2000 h后，富镁环氧树脂涂层失效，镁基体发生腐蚀，而添加SAP和ceria的涂层浸泡4448 h后，涂层下方未发生腐蚀，SAP和ceria的添加明显降低了富镁环氧树脂中镁颗粒的活性，从而延长了涂层的使用寿命。另一方面，涂层的致密性和阻隔性也得到了改善。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

腐蚀科学与防护技术 Chemical Engineering-Chemical Engineering (all)

CiteScore

0.60

自引率

0.00%

发文量

2399

期刊介绍： Corrosion Science and Protection Technology is approved by the General Administration of Press and Publication of the State Council, the Chinese Academy of Sciences, the Chinese Academy of Sciences Institute of Metals organized by the domestic and international public circulation of national periodicals metal surface treatment academic journals. The journal is a professional and technical publication. It reports the scientific and technological achievements in the field of metal corrosion and protection, and publishes research reports, reviews, technical reports, research briefs, failure analysis, experience exchange, etc. The readers are engaged in the field of metal corrosion and protection. The target readers are scientific and technological personnel engaged in metal corrosion and protection and teachers and students of related professional colleges and universities. Corrosion Science and Protection Technology is indexed in CSCD, CSTPCD, CA,MA,SA and other authoritative databases.