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6063铝合金铈锰转化膜的研究 被引量:7

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摘要 以Ce(NO3)3和KMnO4为主盐,NaF为促进剂,在6063铝合金上制备Ce-Mn转化膜.分别采用扫描电子显微镜(SEM),显微能谱分析仪(EDS)和X-射线光电子能谱仪(XPS),研究Ce-Mn转化膜的形貌,成分和元素价态.结果显示Ce-Mn转化膜在6063铝合金表面生成,膜主要由铈(三价和四价)和锰(四价)的氧化物和氢氧化物组成.室温时在3.5%NaCl水溶液中,采用动电位极化曲线(Tafel)和交流阻抗(EIS)研究Ce-Mn转化膜的耐腐蚀能力,结果表明经Ce-Mn转化液处理后,铝合金的腐蚀电流密度从1.929μA/cm2下降到0.0916μA/cm2,铝合金表面膜电阻从10kΩ·cm2增加到200kΩ·cm2,Ce-Mn转化膜具有很好的耐腐蚀能力,达到Cr(+3)转化膜的水平.
出处 《科学通报》 EI CAS CSCD 北大核心 2010年第17期1734-1737,共4页 Chinese Science Bulletin
基金 粤港关键领域重点突破(佛山专项)专项基金(2008Z012) 广东省重大科技专项(产业共性技术)基金(2009A08025002)资助项目
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