Zn-ZrO2复合镀层的结构与耐蚀性
Structures and Corrosion Resistance of Zn-ZrO2 Composite Coating
摘 要
采用扫描电镜和X射线衍射仪对Zn-ZrO2复合镀层的表面形貌和结构进行分析,并采用浸泡腐蚀试验、电化学阻抗测试法,对纯锌镀层和Zn-ZrO2复合镀层的耐蚀性能进行了比较.结果表明,加分散剂的Zn-ZrO2复合镀层中ZrO2颗粒粒径约为1 μm;在复合镀层XRD谱图中出现了Zr特征峰.从浸泡试验结果得出,在弱酸性、碱性及中性环境中Zn-ZrO2复合镀层耐蚀性优于纯锌镀层,其主要原因是镀层中存在适量的ZrO2颗粒.
复合镀层
结构
耐蚀性
Zn-ZrO2
composite coating
structure
corrosion resistance
Abstract
The surface morphology and structures of Zn-ZrO2 composite coating was observed by scan electron microscopy and X-ray diffraction.The corrosion resistance of pure zinc coating and Zn-ZrO2 composite coating was comparatively investigated through corrosion immersion test and EIS.The results showed that the diameter of ZrO2 grains was about 1 μm in the Zn-ZrO2 composite coating with dispersant.Zr characteristic absorption band appeared in the XRD pattern of Zn-ZrO2 composite coating.Zn-ZrO2 composite coating exhibited better corrosion resistance than pure Zn coating in weak acid,alkaline and neutral solutions.The existence of ZrO2 grains in the composite coating was the main reason for the better corrosion resistance of composite coating than that of pure zinc coating．
中图分类号 TG174.44
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50004003);广东省自然科学基金团队项目(04205301);广东省重大攻关项目(2004A10701005)
收稿日期 2008/11/19
修改稿日期 2009/2/8
网络出版日期
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备注谢绍俊,硕士研究生.
引用该论文: XIE Shao-jun,HE Xiang-zhu,FU Wei-qin,SHU Xu-gang. Structures and Corrosion Resistance of Zn-ZrO2 Composite Coating[J]. Corrosion & Protection, 2009, 30(12): 886～888
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参考文献
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