| Fe2+浓度对20号钢表面电镀Fe-Ni合金镀层的影响 |
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| 引用本文： | 史艳华.Fe2+浓度对20号钢表面电镀Fe-Ni合金镀层的影响[J].北京科技大学学报,2011,33(3):313-317. |
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| 作者姓名： | 史艳华 |
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| 作者单位： | 辽宁石油化工大学机械工程学院石油化工过程腐蚀与防护技术中心; |
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| 基金项目： | 国家自然科学基金委员会青年科学基金资助项目(No.50801036) |
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| 摘 要： | 采用电沉积技术在20号钢表面制备了Fe--Ni合金层,考察了镀液中Fe2+浓度对合金镀层沉积速度、镀层成分、相结构、镀层显微硬度和耐蚀性的影响规律,并探讨了耐蚀机理.实验结果表明:电镀Fe--Ni合金可获得纳米晶结构,随镀液中Fe2+浓度增加,镀层中含铁量增大;镀层显微硬度的变化与Fe原子在Ni晶格中有序固溶程度有关;Fe--Ni合金镀层的耐蚀性均优于20号钢,当镀液Fe2+浓度为0.01 mo.lL-1时,获得镀层具有最佳的耐蚀性.随镀层中铁含量增加,具有钝化特性的高含Ni的Fe--Ni相含量减少,耐蚀性下降,但该相纳米结构显著细化,加速钝化可提高耐蚀性,这一对矛盾导致镀层耐蚀性与铁含量间没有明显的变化规律.高孔隙率也是耐蚀性下降的原因之一.
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| 关 键 词： | 电沉积 镀层 镍合金 钢 耐蚀性 电化学性能 |
Effect of Fe2+ concentration on the electrodeposition Fe-Ni coating on 20 steel |
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| SHI Yan-hua.Effect of Fe2+ concentration on the electrodeposition Fe-Ni coating on 20 steel[J].Journal of University of Science and Technology Beijing,2011,33(3):313-317. |
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| Authors: | SHI Yan-hua |
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| Institution: | SHI Yan-hua Center for Corrosion and Protection Technology in Petro-chemical Industry(CCPT),School of Mechanical Engineering,Liaoning Shihua University,Fushun 113001,China |
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| Abstract: | An Fe-Ni alloy coating on 20 steel was prepared by electrodeposition technology.The effects of Fe2+ concentration in the bath on the deposition rate,chemical composition,phase structure,micro-hardness and corrosion resistance of the coating were investigated,and the corrosion mechanism was analyzed.Experimental results show that the Fe-Ni alloy coating is nano-crystalline,and the iron content in the coating increases with increasing Fe2+ concentration in the bath.The change in micro-hardness of the Fe-Ni co... |
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| Keywords: | electrodep osition coatings nickel alloys steel corrosion resistance electrochemical properties |
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