| 镀锌植酸钝化膜耐蚀性的研究 |
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| 引用本文： | 胡会利,李宁,程瑾宁. 镀锌植酸钝化膜耐蚀性的研究[J]. 电镀与环保, 2005, 25(6): 21-25 |
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| 作者姓名： | 胡会利 李宁 程瑾宁 |
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| 作者单位： | 哈尔滨工业大学,应用化学系,黑龙江,哈尔滨,150001;哈尔滨工业大学(威海)海洋学院,山东,威海,264209;哈尔滨工业大学(威海)海洋学院,山东,威海,264209 |
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| 摘 要： | 对镀锌件植酸钝化膜进行了研究.通过点滴实验、中性盐雾试验、盐水浸泡以及电化学测量方法研究了植酸钝化膜的耐蚀性能.采用X射线荧光光谱仪(XRF)和体式显微镜初步研究了植酸钝化膜的结构,推测钝化膜主要由植酸锌和聚硅酸构成,且钝化膜十分致密,可有效阻止腐蚀介质的渗透,降低了镀锌层腐蚀电流,其耐蚀性已经接近低铬钝化.
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| 关 键 词： | 无铬钝化 植酸 耐蚀性 电化学测量 |
| 文章编号： | 1000-4742（2005）06-0021-05 |
| 收稿时间： | 2005-05-10 |
| 修稿时间： | 2005-05-10 |
A Research on the Corrosion Resistance of Phytic Acid Passivating Coatings for Galvanized Parts |
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| HU Hui-li,LI Ning,CHENG Jin-ning. A Research on the Corrosion Resistance of Phytic Acid Passivating Coatings for Galvanized Parts[J]. Electroplating & Pollution Control, 2005, 25(6): 21-25 |
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| Authors: | HU Hui-li LI Ning CHENG Jin-ning |
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| Affiliation: | 1. Department of Chemistry of Harbin Institute of Technology, Harbin 150001 ; 2. Department of Ocean of Harbin Institute of Technology, Weihai 264209 |
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| Abstract: | A chromium-free phytic acid passivating coatings for galvanized parts is studied. The corrosion resistance of the passivation coating is tested with dropping,neutral salt spray,salt solution soaking and electrochemical methods,X-ray fluorescent spectrometry(XRF) and stereomicrography are used to explore the structure of phytic acid passivating film.It is found that the film mainly consists of zinc phytate and polysilicic acid.The film is so compact that it can inhibit the infiltration of corrosive medium effectively,thus reducing the corrosive current to zinc coating.Its corrosion resistance already approaches to low-chromate passivation |
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| Keywords: | chromium-free passivation phytic acid corrosion resistance electrochemical measurement |
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