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Title: Influence of electroless plating on the deterioration of the corrosion resistance of MAO coated AZ31B magnesium alloy
Authors: Shun-Yi Jian
Jeou-Long Lee
Hung-Bin Lee
Hung-Hua Sheu
Chang-Ying Ou
Ming-Der Ger
Contributors: 國立臺灣海洋大學:光電與材料科技學系
Keywords: Magnesium alloy
Micro arc oxidation
Electroless Ni–P plating
Corrosion resistance
Salt spray test
Date: 2016-09
Issue Date: 2018-08-20T03:11:20Z
Publisher: Journal of the Taiwan Institute of Chemical Engineers
Abstract: Abstract: A composite bi-layer film is prepared on AZ31B Mg alloy for corrosion protection by means of micro arc oxidation (MAO) and electroless Ni–P plating. The electroless plating of Ni–P on MAO coated Mg alloy is accomplished based on a St-co-NIPAAm/Pd nanoparticles activator. The structure and corrosion protection are characterized by scanning electron microscopy (SEM), electron probe X-ray micro-analyzer, potentiodynamic polarization measurements in 3.5 wt% NaCl solution and salt spray tests. A compact and continuous bi-layer coating on Mg alloy substrate can be formed via MAO for 10 min and electroless plating coating for 40 min. However, our results show that the bi-layer coating exhibited a much worse corrosion resistance than that of the Mg alloy with a single MAO coating. After a systematical investigation in corrosion behaviors, a possible mechanism for the deterioration of corrosion resistance is proposed in this study.
Relation: 68 pp.496-505
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/48240
Appears in Collections:[光電科學研究所] 期刊論文

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