铝合金表面微弧氧化陶瓷层的耐腐蚀性能
Corrosion Resistance of Micro-arc Oxidation Ceramic Coating on Aluminum Alloy Surfaces
摘 要
采用微弧氧化技术,以硅酸钠为主体配以Na2WO4、KOH、Na2EDTA辅助添加剂的电解液,在2A12铝合金表面原位生成陶瓷层,以提高铝合金的耐腐蚀性能.用扫描电镜(SEM)和X射线衍射仪(XRD)分析了微弧氧化陶瓷层的截面形貌和相结构;用显微硬度仪测量了陶瓷层的显微硬度;用CS300P型电化学腐蚀工作站在36 g/L的NaCl溶液中测试了陶瓷层的电化学腐蚀性能.结果表明:微弧氧化陶瓷层的厚度为4 μm,显微硬度达到683 HV,其相组成主要是α-Al2O3和γ-Al2O3:铝合金表面微弧氧化陶瓷层提高了铝合金的耐腐蚀性能,使其腐蚀速率明显减慢.
微弧氧化
耐腐蚀性能
aluminium alloy
microarc oxidation
corrosion resistance
Abstract
A dense oxide ceramic coating was prepared on 2A12 aluminium alloy by micro-arc oxidation in a Na2SiO3-Na2WO4-KOH-Na2EDTA electrolytic solution.Using SEM and XRD,the cross sectional morphology and phase structure of the micro-arc oxidation ceramic coating were analyzed.The microhardness of coating surface was also measured.The corrosion resistance of the micro-arc oxidation ceramic coating was tested using CS300P electrochemical corrosion workstation in 36 g/L NaCl solution.The thickness of micro-arc oxidation ceramic coating is about 4 μm.The microharness of coating surface is up to 683 HV.The phases are mainly α-Al2O3 and γ-Al2O3 in the coating.The corrosion resistance of the micro-arc oxidation ceramic coating in 36 g/L NaCl solution is enhanced remarkably,the corrosion velocity is obviously slowed down.
中图分类号 TG115.221.5
所属栏目
基金项目 印刷包装材料与技术北京市重点实验室开放研究课题基金资助项目(KF050203)
收稿日期 2006/7/28
修改稿日期 2006/10/20
网络出版日期
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备注陈飞(1971-),男,河北大名人,讲师,博士研究生.
引用该论文: CHEN Fei,ZHOU Hai,YAO Bin,CHEN Chen. Corrosion Resistance of Micro-arc Oxidation Ceramic Coating on Aluminum Alloy Surfaces[J]. Materials for mechancial engineering, 2007, 31(6): 53～55
陈飞,周海,姚斌,陈晨. 铝合金表面微弧氧化陶瓷层的耐腐蚀性能[J]. 机械工程材料, 2007, 31(6): 53～55
被引情况:
【1】边培莹,戴君, "ZL101A铝合金表面微弧氧化陶瓷层的摩擦磨损性能",机械工程材料 40, 102-105(2016)
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参考文献
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【7】Krishna L R,Somaraju K R C.The tribological performance of ultra-hard ceramic composite coatings obtained through microarc oxidation[J].Surface and Coatings Technology,2003,163/164:484-490.
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【9】蒋百灵,张先锋.镁合金微弧氧化陶瓷层的生长过程及其耐蚀性[J].中国腐蚀与防护学报,2005,25(2):97-101.
【10】Mecuson F,Czerwiec T,Belmonte T,et al.Diagnostics of an electrolytic microarc process for aluminiumalloy oxidation[J].Surface & Coatings Technology,2005,200:804-807.
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