Scratch-resistant anticorrosion sol-gel coating for the protection of AZ31 magnesium alloy via a low temperature sol-gel route

被引：100
|
作者：
Wang, Heming [1 ]
Akid, Robert [1 ]
Gobara, Mohamed [1 ]
机构：
[1] Sheffield Hallam Univ, Mat & Engn Res Inst, Sheffield S1 1WB, S Yorkshire, England
来源：
CORROSION SCIENCE | 2010年 / 52卷 / 08期
关键词：
AZ31; Magnesium alloy; Polyaniline; Sol-gel coating; Corrosion protection; CORROSION PROTECTION; PERFORMANCE; BEHAVIOR;
D O I：
10.1016/j.corsci.2010.04.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel hybrid sol-gel/polyaniline coating has been developed for application onto an AZ31 magnesium alloy for corrosion protection. Electrochemical Impedance Spectroscopy in 3.5 wt% NaCl and diluted Harrison's solutions, along with salt spray tests showed that the coating possesses excellent corrosion resistance. The hybrid coating was modified by doping with silica nanoparticles (for scratch resistance) and cured at a low temperature of 75 degrees C. Whilst conventional sol-gel methods tend to limit the coating thickness values up to 10 mu m, the new hybrid sol-gel/polyaniline system presented here allows thick coatings to be deposited, in this case, around 50-60 mu m. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2565 / 2570
页数：6
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