Corrosion Resistance of SiO<sub>2</sub>-ZrO<sub>2</sub> Sol-gel Film on Magnesium Alloy

Shang Wei; Wen Yuqing; Jiang Jiqiong; He Yang; Li Huanping

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Corrosion Resistance of SiO₂-ZrO₂ Sol-gel Film on Magnesium Alloy
Vol. 31, Issue 3, Pages: 269-271(2011)
Published： 2011 ，
DOI：

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[1]尚伟,温玉清,姜吉琼,何扬,李欢平.镁合金表面SiO_2-ZrO_2溶胶凝胶膜的耐蚀性[J].特种铸造及有色合金,2011,31(03):269-271+194.

Shang Wei, Wen Yuqing, Jiang Jiqiong, et al. Corrosion Resistance of SiO₂-ZrO₂ Sol-gel Film on Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):269-271(2011)
[1]尚伟,温玉清,姜吉琼,何扬,李欢平.镁合金表面SiO_2-ZrO_2溶胶凝胶膜的耐蚀性[J].特种铸造及有色合金,2011,31(03):269-271+194. DOI：

Shang Wei, Wen Yuqing, Jiang Jiqiong, et al. Corrosion Resistance of SiO₂-ZrO₂ Sol-gel Film on Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):269-271(2011) DOI：

摘要

采用溶胶-凝胶法在AZ91D镁合金表面制备SiO2-ZrO2复合溶胶凝胶膜。研究膜层制备工艺中的干燥、固化过程对膜层耐腐蚀性能的影响

从而确定了SiO2-ZrO2复合溶胶凝胶膜在镁合金表面的最佳沉积工艺。通过全浸腐蚀试验和电化学测试方法评价了膜层的耐腐蚀性能。试验确定最佳沉积工艺参数:干燥温度为80℃、干燥时间为9h、固化温度为250℃、固化时间为1h。在优化工艺条件下制备的溶胶凝胶膜层对镁合金基体有一定的防护作用

提高了镁合金的耐蚀性。

Abstract

SiO2-ZrO2 sol-gel film was prepared on magnesium alloy AZ91D by sol-gel technique

and effects of drying and curing process on corrosion resistance of sol-gel film were investigated to determine the optimized deposition process of the SiO2-ZrO2 sol-gel film on magnesium alloy. Corrosion resistance of the sol-gel film was evaluated by total immersion testing and electrochemistry in a 3.5% NaCl solution. The results indicate that sol-gel film exhibits acceptable protection effects on the magnesium alloy substrate with drying for 9 hours at 80℃ and curing for 1 hours at 250℃

improving the corrosion resistance of the magnesium alloy.