Corrosion resistance of a superhydrophobic micro-arc oxidation coating on Mg-4Li-1Ca alloy. Issue 11 (November 2017)

• Record Type: Journal Article
• Authors: Cui, Lan-Yue; Liu, Han-Peng; Zhang, Wen-Le; Han, Zhuang-Zhuang; Deng, Mei-Xu; Zeng, Rong-Chang; Li, Shuo-Qi; Wang, Zhen-Lin
• Is Part Of: Journal of materials science & technology. Volume 33:Issue 11(2017:Nov.)
• Page Start: 1263
• Page End: 1271
• Publication Date: 2017-11
• Subjects: Magnesium alloys -- Micro-arc oxidation -- Superhydrophobic coating -- Corrosion; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2017.10.010
• Languages: English
• ISSNs: 1005-0302

Abstract

Abstract: A micro-arc oxidation (MAO)/zinc stearate (ZnSA) composite coating was fabricated via MAO processing and subsequent sealing with electrodeposition of a superhydrophobic ZnSA. The surface morphologies, chemical composition and corrosion resistance of the coatings were investigated using field-emission scanning electron microscopy, Fourier transform infrared, X-ray diffraction and electrochemical and hydrogen evolution measurements. Results indicated that the MAO coating was efficiently sealed by the following superhydrophobic ZnSA coating. The MAO/ZnSA composite coating significantly enhanced the corrosion resistance of Mg alloy Mg-4Li-1Ca due to its superhydrophobic function. Additionally, corrosion mechanism was suggested and discussed for the composite coating.