金属表面Mo(W)-S彩色簇合物膜的光谱研究

摘要

By means of the interface reactions of Mo(W)S2-4 on a metal (copper, steel, zinc,silver, nickel, tin) surface, insoluble cluster compound films were formed with a metallic luster of various colors changing in accordance with the reaction time. The films are functional finishing layers, possessing not only decorative properties, but improving the brightness and cleanliness of the metal surface, and promoting the antieorrosive ability of the metals as well. Their colors are probably caused by Mo(W)-S-M (M= Cu, Fe, Zn, Ag, Ni, Sn) bonds and a statistical distribution and overlapping of various molecular layers,inasmuch as the films are complex multicomponent and smultilayer systems. Accelerated corrosion tests,LSV,CV,FT-IR, FT-Rmamn;XPS and AES determinations were carried to investigate composition and structure of these conversion films. The results show that bridged Mo(W)-S-M, terminal Mo(W)-S and terminal Mo(W)-O bonds exist in the cluster compound films. The mechanism for films formation and the relationships between these novel films structure and the observed inhibition behavior are discussed.%Mo(W)S2-4与金属M(M=Cu、Fe、Zn、Ag、Ni、Sn)表面发生配位化学反应,得到不溶性且具有装饰效果的Mo(W)-S彩色簇合物膜.随着反应时间或加热时间的变化,膜呈现不同的具有金属光泽的颜色.这种膜层属于功能性修饰层,不仅赋予金属表面以美观的外表,而且提高表面的光洁度和清洁度,增强金属的抗腐蚀性能.本文采用加速腐蚀实验、LSV、CV、FT-IR、FT-Raman、XPS和AES研究了Mo(W)S2-4在金属表面的成键特征和波谱变化,探讨了簇合物膜的组成、性能、结构、化学状态和形成机理.结果表明,膜层中存在桥基Mo(W)-S-M键、端基Mo(W)-S和Mo(W)-O键.膜为多分子层组成的复杂体系,其颜色是各组分统计分布的结果.