热浸镀锌层钛盐转化膜的制备和耐蚀性能
Chinese Journal of Materials Research（2014）
Abstract
制备了热浸锌层钛盐转化膜,采用SEM、EDS表征了转化膜的表面形貌、化学成分,采用XPS技术分析了膜层的组成,探讨了膜层的生长过程.通过中性盐雾试验、电化学极化分析和电化学阻抗研究了膜层的耐蚀性能.结果表明,膜层主要由含结晶水的Ti(OH)4/TiO2和Zn(OH)2/ZnO组成,随着处理时间的增加钛盐转化膜逐渐增厚,膜层中的Ti含量逐渐增加.与未经处理的热浸镀锌层比较,转化膜层腐蚀电流密度减小,极化电阻和电化学阻抗显著增大,耐蚀性明显增强.
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Key words
titanium, corrosion resistance,materials failure and protection, conversion film, hot-dip galvanizing
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