Anti-corrosion Performance of Organic-inorganic Duplex Coating on Magnesium Surface
摘 要
以γ-氨丙基三甲氧基硅烷(γ-APS)为前驱体, 采用溶胶-凝胶法制备硅烷溶液, 并采用浸涂法在纯镁表面制备有机-无机杂化腐蚀保护膜。金相显微镜对有机-无机杂化膜的表面形貌观察表明, 有机-无机杂化膜比铬钝化膜更均匀致密; 对有机-无机杂化膜进行动电位极化曲线测定及试验后的显微形貌表明, 与铬钝化膜相比, 有机-无机杂化膜的自腐蚀电位更正, 腐蚀电流密度更小, 耐腐蚀性能更好。且有机-无机杂化膜无污染。该工艺可以有效取代铬钝化工艺。
Abstract
Using γ-aminopropyltrimethoxysilane (γ-APS) as precursor, silane solution was prepared by sol-gel method, and then the organic-inorganic duplex protecting coating on Mg was prepared by Mg dipped into the silane solution. The surface morphology of the organic-inorganic hybrid coating was observed by metallographic microscopy. The results show that the organic-inorganic duplex protecting coating is smooth and more adhesive than the chromate film. Potentiodynamic polarization curve measurement and metallographic microscopy results show that the corrosion potential of the organic-inorganic duplex protecting coating is higher and corrosion current is smaller than those of the chromate film, and thus the coating possesses better anti-corrosion performance. The organic-inorganic duplex protecting coatings is environmentally friend. The suggested process can replace the chromate process effectively.
中图分类号 TG179
所属栏目 应用技术
基金项目
收稿日期 2010/10/9
修改稿日期 2010/11/26
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联系人作者陈玉珍(mbscyz@126.com)
备注陈玉珍, 实验师,
引用该论文: CHEN Yu-zhen,GAO Yu-zhou,HE Yu-juan. Anti-corrosion Performance of Organic-inorganic Duplex Coating on Magnesium Surface[J]. Corrosion & Protection, 2011, 32(8): 649
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参考文献
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【4】刘琰, 尤宏, 胡立江, 等. VMS有机-无机杂化膜的制备及其防腐性能研究[J]. 哈尔滨工业大学学报, 2005, 37(10):1344-1347.
【5】郭增昌. 铝合金表面防腐蚀处理新工艺[J]. 材料保护, 2005, 25(3):25-27.
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【7】Zhu D Q, Wim J van Ooij. Corrosion protection of metals by water-based silane mixtures of bis-[trimetho-xysilylpropyl] amine and vinyltriacetoxysilane[J]. Progress in Organic Coatings, 2004, 49(1):42-53.
【8】Vignesh Palanivel, Zhu D Q, Wim J van Ooij. Nanoparticle-filled silane films as chromate replacements for aluminum alloys[J]. Progress in Organic Coatings, 2003, 47(3):384-392.
【9】赵惠, 崔建忠. 镁及其合金表面化学镀银工艺的研究[J]. 表面技术, 2007, 36(4):45-47.
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