Improved anticorrosion of magnesium alloy via layer-by-layer self-assembly technique combined with micro-arc oxidation

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• 作者：Peng Liu^a ; ^{liupeng79@cqu.edu.cn} ; Xin Pan^b ; Weihu Yang^a ; Kaiyong Cai^a ; Yashao Chen^b
• 关键词：Magnesium alloys ; Corrosion ; Surfaces ; Layer-by-layer ; Micro-arc oxidation
• 刊名：Materials Letters
• 出版年：2012
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：15 May, 2012
• 卷：75
• 期：Complete
• 页码：118-121
• 文件大小：539 K

摘要

To enhance corrosion resistance of WE43 magnesium alloy, chitosan (CHI) and poly (styrene sulfonate) (PSS) polyelectrolyte multilayers were fabricated on micro-arc oxidation (MAO) treated magnesium alloy substrate via layer-by-layer (LBL) self-assembly technique. Surface morphology and chemical composition of the MAO/LBL composite coating were investigated by scanning electron microscopy (SEM), atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS), respectively. Potentiodynamic polarization test and hydrogen evolution measurement showed that the formed MAO/LBL coating significantly enhanced corrosion resistance of WE43 magnesium alloy in simulated body fluid (SBF). The approach presented here affords an effective alternative for surface modification of magnesium-based materials to meet the requirements of biomaterials applications.