尚伟,温玉清,司延举,王旭峰,姜吉琼.镁合金表面磷化 / 溶胶凝胶复合膜的制备及其耐蚀性[J].表面技术,2014,43(2):95-99.
SHANG Wei,WEN Yu-qing,SI Yan-ju,WANG Xu-feng,JIANG Ji-qiong.Preparation and Corrosion Resistance of Phosphating Sol-Gel Composite Coatings on Magnesium Alloy[J].Surface Technology,2014,43(2):95-99
镁合金表面磷化 / 溶胶凝胶复合膜的制备及其耐蚀性
Preparation and Corrosion Resistance of Phosphating Sol-Gel Composite Coatings on Magnesium Alloy
投稿时间:2013-11-05  修订日期:2013-12-26
DOI:
中文关键词:  镁合金  磷化膜  溶胶凝胶  复合膜层  耐蚀性
英文关键词:magnesium alloys  phosphate coating  sol-gel  composite coatings  corrosion resistance
基金项目:广西矿冶与环境科学实验中心资助项目( KH2012ZD002) ;桂林理工大学博士科研启动项目(002401003351)
作者单位
尚伟 桂林理工大学 广西矿冶与环境科学实验中心, 广西 桂林 541004 
温玉清 桂林理工大学 广西矿冶与环境科学实验中心, 广西 桂林 541004 
司延举 许继集团有限公司, 河南 许昌 461000 
王旭峰 桂林理工大学 广西矿冶与环境科学实验中心, 广西 桂林 541004 
姜吉琼 桂林理工大学 广西矿冶与环境科学实验中心, 广西 桂林 541004 
AuthorInstitution
SHANG Wei Guangxi Scientific Experiment Center of Mining,Metallurgy and Environment,Guilin University of Technology, Guilin 541004, China 
WEN Yu-qing Guangxi Scientific Experiment Center of Mining,Metallurgy and Environment,Guilin University of Technology, Guilin 541004, China 
SI Yan-ju Xuji Group Corporation, Xuchang 461000, China 
WANG Xu-feng Guangxi Scientific Experiment Center of Mining,Metallurgy and Environment,Guilin University of Technology, Guilin 541004, China 
JIANG Ji-qiong Guangxi Scientific Experiment Center of Mining,Metallurgy and Environment,Guilin University of Technology, Guilin 541004, China 
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中文摘要:
      目的 结合磷化与溶胶凝胶工艺,在 AZ91 镁合金表面制备磷化 / 溶胶凝胶复合膜。 方法 先对镁合金进行磷化处理,再多道涂覆 SiO2 溶胶凝胶层,通过正交试验结合电化学分析方法,优化溶胶凝胶层涂覆工艺,并分析磷化 / 溶胶凝胶复合膜的表面微观形貌和耐蚀性。 结果 溶胶凝胶层的优化沉积工艺如下: TEOS,TEOH,H2O, HCl 体积比为 28 : 20 : 10 : 0 . 35 ,凝胶温度 30 ℃ ,凝胶时间 5 min, 涂覆 6次。 在优化条件下所制备的复合膜结合力好且光滑,有少许微裂纹,与镁合金基体和磷化膜样品相比,其腐蚀电流密度最小,电化学阻抗最大。 结论 磷化 / 溶胶凝胶复合膜提高了镁合金的耐蚀性。
英文摘要:
      Objective The composite coatings were prepared on AZ91 magnesium alloy using the phosphate and sol-gel process.Methods Magnesium alloy was phosphatized, then coated with multiple SiO2sol gel layers. Using the orthogonal experiment combined with electrochemical analysis method,we optimized the deposition process conditions of the sol gel film,and analyzed the surface microstructure and corrosion resistance of the composite coatings. Results The results showed that the optimized deposition process conditions of the sol gel film were as follows: volume ratio of sol formula ( TEOS : TEOH : H2O : HCl ) 28 : 20 : 10 : 0. 35, gel temperature 30 ℃ , gel time 5 min, coating times 6. Under the optimal condition, the composite coating was smooth, with a few micro cracks and good binding force. Compared with the magnesium alloy substrate and phosphate coating, the corrosion current density of the composite coating was the lowest, and the electrochemical impedance was the largest. Conclusion The corrosion resistance of magnesium alloy was improved by phosphating sol-gel composite coating.
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