中华医学超声杂志

应用化学 ›› 1993, Vol. 0 ›› Issue (4): 5-9.

• 研究论文 • 上一篇    下一篇

Keggin型杂多酸在镀锌钝化中的应用

吴乃钧1, 王素方1, 王占文1, 徐海乔1, 方景礼2   

  1. 1. 南京化工学院应用化学系 210009 南京;
    2. 南京大学应用化学研究所 南京
  • 收稿日期:1992-10-06 修回日期:1992-12-29 出版日期:1993-08-10 发布日期:1993-08-10

APPLICATION OF KEGGIN HETEROPOLYACIDS IN PASSIVATION OF ZINC-PLATING COATING

Wu Naijun1, Wang Shufang1, Wang Zhanwen1, Xu Haiqiao1, Fang Jingli2   

  1. 1. Department of applied Chemistry, Nanjing Institute of Chemical Technlolgy, 210009 Nanjing;
    2. Applied Chemistry Institute, Nanjing University, Nanjing
  • Received:1992-10-06 Revised:1992-12-29 Published:1993-08-10 Online:1993-08-10

PDF

499

被引次数

3

摘要： 比较了H4SiMo12O40、H3PW12O40、H4SiW12O40、H3PMo12O40及铬酸盐对镀锌层钝化效果。H3PMo12O40钝化的最佳条件为:H3PMo12O405g/L,pH 1.1,钝化时间35秒,温度15℃,空留时间10秒,封闭温度100℃(水)。经扫描电镜、XPS、AES、IR和Raman光谱等测定,表明在锌表面形成了一种含有P、Mo、O及Zn的耐蚀性膜。其中钼以Mo(Ⅵ)、Mo(Ⅴ)和Mo(Ⅳ)存在,P/Mo比为1:3.0。推测锌表面形成了一种形如Znx(PMo3)rOz/ZnO/Zn的复杂钝化膜。

关键词: 锌镀层, 钝化, 杂多酸

Abstract: It was found that H3PMo12O40 was an excellent passivator in comparison with H4SiMo12O40, H3PW12O40, H4SiW12O40 and chromates. The optimium conditions of passivation with H3PMo12O40 on the zinc-plating coating as follows:H3PMo12O40 5g/L, pH 1.1, passivation time 35s, passivation temperature 15℃, retention time in air 10s, confinement temperature 100℃(water). The surface appearence, composition and possible structure of the passivated film were determined by scanning electron microscopy, X-ray photoelectron spectroscopy, Auger electron spectroscopy, IR and Raman spectrometry. The results showed that a dense corrosion-resistant film was formed on the zinc surface consisting of P, Mo, O and Zn. Molybdenum existed in Mo (Ⅵ), Mo (Ⅴ) and Mo(Ⅵ) in the film with a P/Mo ratio 1:3.0. A certain complex passivated film, Znx(PMo3)yOx/ZnO/Zn is assumed to be formed.

Key words: zinc-plating coating, passivation, heteropoly acid

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