引用本文:
吴乃钧, 王素方, 王占文, 徐海乔, 方景礼. Keggin型杂多酸在镀锌钝化中的应用[J]. 应用化学,
1993, 10(4): 5-9.
Citation: Wu Naijun, Wang Shufang, Wang Zhanwen, Xu Haiqiao, Fang Jingli. APPLICATION OF KEGGIN HETEROPOLYACIDS IN PASSIVATION OF ZINC-PLATING COATING[J]. Chinese Journal of Applied Chemistry, 1993, 10(4): 5-9.
Citation: Wu Naijun, Wang Shufang, Wang Zhanwen, Xu Haiqiao, Fang Jingli. APPLICATION OF KEGGIN HETEROPOLYACIDS IN PASSIVATION OF ZINC-PLATING COATING[J]. Chinese Journal of Applied Chemistry, 1993, 10(4): 5-9.
Keggin型杂多酸在镀锌钝化中的应用
English
APPLICATION OF KEGGIN HETEROPOLYACIDS IN PASSIVATION OF ZINC-PLATING COATING
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.
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Key words:
- zinc-plating coating
- / passivation
- / heteropoly acid
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