Journal
SURFACE & COATINGS TECHNOLOGY
Volume 328, Issue -, Pages 121-133Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2017.08.039
Keywords
Magnesium alloy; Magnesium hydroxide; Polymer coating; Cerium oxide; Corrosion
Funding
- National Natural Science Foundation of China [51601108, 51571134]
- Natural Science Foundation of Shandong Province [2016ZRB01A62]
- Scientific Research Foundation of Shandong for Outstanding Young Scientists [BS2013CL009]
- Doctoral Program Foundation of the State Education Ministry [20133718120003]
- Qingdao Indigenous Innovation Program [15-9-1-76-jch]
- SDUST Research Fund [2014TDJH104]
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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.
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