中华医学超声杂志

应用化学 ›› 1998, Vol. 0 ›› Issue (6): 1-5.

• 研究论文 •    下一篇

钢铁表面W-S簇合物彩色钝化膜的组成和结构

李道华, 叶向荣, 周益明, 忻新泉   

  1. 南京大学配位化学研究所, 配位化学国家重点实验室 南京210093
  • 收稿日期:1998-03-16 修回日期:1998-06-22 出版日期:1998-12-10 发布日期:1998-12-10
  • 基金资助:
    国家自然科学基金;江苏省自然科学基金;南京大学现代分析测试中心基金

Constitution and Structure of the Colored Passive Films of W-S Cluster Compounds on Steel Surface

Li Daohua, Ye Xiangrong, Zhou Yiming, Xin Xinquan   

  1. Coordination Chemistry Institute of Nanjing University, State Key Laboratory of Coordination Chemistry, Nanjing 210093
  • Received:1998-03-16 Revised:1998-06-22 Published:1998-12-10 Online:1998-12-10

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摘要： 通过(NH4)2WS4溶液浸渍,在钢铁表面获得了具有良好装饰效果和耐蚀性能的彩色W-S簇合物膜。FT-IR、F-IR、FT-Raman、XPS和AES分析结果表明,簇合物膜中存在W-S-Fe、端基W-S和端基W-O键,膜层由W、S、Fe、O元素组成,膜外层各元素价态分别为+6、+6(+4)、+3、-2,膜内层其价态则分别为+6(+4)、-2、+2、-2.膜为多分子层结构,从AES深度分布曲线的组成恒定区求得了元素的相对原子分数和膜层厚度。反应时间越长,膜越厚。在250℃空气中加热2h后膜层所含元素种类和价态不变,但各元素的分布和膜的结构发生了变化.

关键词: W-S簇合物, 彩色钝化膜, 钢铁表面

Abstract: Colored W-S cluster compound films as decorative and anticonosive layers were coated on strrl surface by immevsing in W-S42- solution. The results of FTIR, FIR, FTRaman, APS and AES analyses showed the existence of W-S-Fe, terminal WS and terminal WO bonds in the cluster films. The films were composed of the elements W, S, Fe and O. The valences of these elements are found to be +6, +6(+4), +3, -2 in the surface, and +6(+4), -2, +2, -2 in the internal layer of the films, respectively. A multimolecular layer structure of the films has been verified. The relative atomic percent contents and the thickness of the films were calculated at the constant elemental composition section on the AES profile curves. The longer the reaction time, the thicker the films. On heating at 250 in air for 2 hours the structure and distribution of the elements changed, while the composition and valence state of the elements in the films remained unchanged.

Key words: W-S cluster compound, colored passive film, steel surface

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