无铬纳米锌铝涂层的微观组织及腐蚀性能

中国腐蚀与防护学报

2013, Vol. 33

Issue (5): 425-429

研究报告

本期目录 | 过刊浏览

无铬纳米锌铝涂层的微观组织及腐蚀性能

朱俊谋¹, 姚正军¹, 蒋穹¹, 魏东博¹, 尹国贤², 罗西希¹, 周文斌¹

1. 南京航空航天大学材料科学与技术学院南京 211106;
2. 江苏麟龙新材料股份有限公司无锡 214100

Microstructure and Corrosion Resistance of Cr-free Nanocomposite Zn/Al Coatings

ZHU Junmou¹, YAO Zhengjun¹, JIANG Qiong¹, WEI Dongbo¹, YIN Guoxian²,
LUO Xixi¹, ZHOU Wenbin¹

1. College of Material Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;
2. Jiangsu Linglong New Materials Co. Ltd., Wuxi 214100, China

全文: PDF(4929 KB)

摘要: 向无铬锌铝涂层中分别加入3种纳米微粒ZnO，TiO₂和SiO₂制备纳米复合涂层，通过盐水浸泡实验和电化学测试研究其耐蚀性，结合SEM等手段观察纳米复合涂层显微组织及其在盐水中的腐蚀情况，分析纳米微粒在涂层中所起作用。结果表明，3种纳米微粒的加入能够加强涂层的阴极保护作用，并能延缓涂层金属粉末的消耗，较无铬锌铝涂层更易减慢腐蚀速率。其中，纳米SiO₂复合涂层耐蚀性最佳，纳米TiO₂复合涂层略次，ZnO纳米复合涂层耐蚀效果较差，3种纳米复合涂层耐蚀性均优于无铬锌铝涂层。

关键词 ：无铬, 纳米复合涂层, 耐蚀性, 阴极保护

Abstract：In order to improve the corrosion resistance of chromium-free Zn/Al coating, three different nanoparticles, eg. SiO₂, TiO₂and ZnO were added in the coating respectively to form nanocomposite coatings. Corrosion properties of the nanocomposite coatings were examined through salt water immersion method and electrochemical method. Furthermore, the microstructure and corrosion products of the coatings were analyzed by means of SEM and EDS. The experimental results showed that the nanoparticles dispersed in the coating in the form of flake structure which formed a more effective physical shield, extending the path of the corrosive medium to substrate. Furthermore, the fine grain strengthening was dominant to make the coating a good shielding property when nanoparticle was added. Tafel curves indicated that the nanocomposite coating with SiO₂ possessed the best cathodic protection among three nanocomposite coatings, and the corrosion resistance of three nanocomposie coatingswas better than that of the chromium-free Zn/Al coating.

Key words： Cr-free nanocomposite coating corrosion resistance cathodic protection

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引用本文:

朱俊谋, 姚正军, 蒋穹, 魏东博, 尹国贤, 罗西希, 周文斌. 无铬纳米锌铝涂层的微观组织及腐蚀性能[J]. 中国腐蚀与防护学报, 2013, 33(5): 425-429.
ZHU Junmou, YAO Zhengjun, JIANG Qiong, WEI Dongbo, YIN Guoxian,
LUO Xixi, ZHOU Wenbin. Microstructure and Corrosion Resistance of Cr-free Nanocomposite Zn/Al Coatings. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 425-429.

链接本文:

https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y2013/V33/I5/425

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