Corrosion resistance of a superhydrophobic micro-arc oxidation coating on Mg-4Li-1Ca alloy

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（11）
• 页码范围: 1263-1271
• 页数: 9页
• 语种: 英文

摘要

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-1 Ca due to its superhydrophobic function.Additionally,corrosion mechanism was suggested and discussed for the composite coating.