| 锌件表面铈盐转化及膜层的耐蚀性 |
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| 引用本文： | 陆鑫,郭瑞光,姚倩,乔亚龙,童少磊,刘江涛. 锌件表面铈盐转化及膜层的耐蚀性[J]. 材料保护, 2012, 45(6): 43-45,73 |
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| 作者姓名： | 陆鑫 郭瑞光 姚倩 乔亚龙 童少磊 刘江涛 |
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| 作者单位： | 西安建筑科技大学西北水资源与环境生态教育部重点实验室,陕西西安,710055 |
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| 基金项目： | 国家自然科学基金项目(20976143);国家大学生创新性实验计划项目(101070312) |
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| 摘 要： | 已有的镀锌件铈盐转化工艺含有过氧化氢，导致钝化性能不稳定，难以工业化应用。采用由硝酸铈和六偏磷酸钠为主盐的转化液，在温度35℃，pH值1．3下处理5min，在锌件表面制备了一种彩色铈盐转化膜。结果表明：无定形结构转化膜主要由64．25％Zn，24．82％0，8．11％P和2．24％Ce组成，其耐中性盐雾腐蚀时间超过144h；铈盐转化膜使锌件腐蚀电位正移了0．14V，腐蚀电流密度减小约10倍，耐蚀性明显增强。
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| 关 键 词： | 铈盐转化 锌件 耐蚀性 |
Preparation and Corrosion Resistance of Cerium -Salt Conversion Coating on Galvanizing Coating |
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| LU Xin,GUO Rui-guang,YAO Qian,QIAO Ya-long,TONG Shao-lei,LIU Jiang-tao. Preparation and Corrosion Resistance of Cerium -Salt Conversion Coating on Galvanizing Coating[J]. Journal of Materials Protection, 2012, 45(6): 43-45,73 |
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| Authors: | LU Xin GUO Rui-guang YAO Qian QIAO Ya-long TONG Shao-lei LIU Jiang-tao |
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| Affiliation: | (Key Laboratory of Northwest Water Resources,Environment and Ecology,Ministry of Education,Xi’an University of Architecture and Technology,Xi ’an 710055,China) |
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| Abstract: | Cerium nitrate and sodium hexametaphosphate were used as the major salts to formulate a conversion fluid for galvanizing coating.When the pH value of the conversion fluid was adjusted as 1.3,color Ce-salt conversion coating was prepared on galvanizing coating by chemical conversion in as-formulated conversion fluid at 35 ℃ for 5 min.It was found that as-prepared Ce-salt conversion coating was amorphous and mainly consisted of 64.25% Zn,24.82% O,8.11% P and 2.24% Ce.In the meantime,as-prepared Ce-salt conversion coating was able to endure neutral salt spraying for 144 h.The conversion coating caused positive shift of corrosion potential of the galvanizing coating by 0.14 V and greatly decreased the corrosion current density,showing good corrosion resistance. |
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| Keywords: | cerium-salt conversion coating galvanizing coating corrosion resistance |
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