Corrosion resistance of ceria/polymethyltrimethoxysilane modified magnesium hydroxide coating on AZ31 magnesium alloy

被引：79
作者：
Guo, Lian [1 ,2 ,3 ]
Zhang, Fen [1 ,2 ,3 ]
Song, Liang [1 ]
Zeng, Rong-Chang [1 ,2 ,3 ]
Li, Shuo-Qi [1 ,2 ,3 ]
Han, En-Hou [4 ]
机构：
[1] Shandong Univ Sci & Technol, Coll Mat Sci & Engn, Qingdao 266590, Peoples R China
[2] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Cofo, Qingdao 266590, Peoples R China
[3] Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Peoples R China
[4] Chinese Acad Sci, Inst Met Res, Natl Engn Ctr Corros Control, Shenyang 110016, Liaoning, Peoples R China
来源：
SURFACE & COATINGS TECHNOLOGY | 2017年 / 328卷
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Magnesium hydroxide; Polymer coating; Cerium oxide; Corrosion; PLASMA ELECTROLYTIC OXIDATION; ALUMINUM-ALLOY; CHEMICAL CONVERSION; MG ALLOY; SILANE PRETREATMENT; CERIUM NITRATE; PROTECTION; FILMS; PERFORMANCE; ELECTRODEPOSITION;
D O I：
10.1016/j.surfcoat.2017.08.039
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A magnesium hydroxide/polymethyltimethoxysilane (PMTIVIS)CeO2 hybrid coating was fabricated via hydro thermal treatment method and subsequent sealing with PMTMS and CeO2. The surface morphologies, wettability, microstructures and chemical compositions of the samples were investigated using FE-SEM, FT-IR, XRD, XPS and contact angle (CA). The corrosion resistance of the composite coatings was evaluated using the electrochemical and hydrogen evolution measurements. The results demonstrated that the magnesium hydroxide coating was sealed by the PMTMS and CeO2. The Mg(OH)(2)/PMTMS/CeO2 coating had a thickness of approximately 12.86 +/- 0.01 pm and significantly enhanced the corrosion resistance of the AZ31 alloy. The influence of the existence of the ceria on the corrosion resistance was investigated. Additionally, a corrosion mechanism of the coating was proposed and discussed. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：121 / 133
页数：13
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