摘要
介绍了无铬钝化技术的发展概况,无铬钝化分为无机物钝化和有机物钝化两个体系,大部分工艺还处于实验室研究阶段。介绍了ZECCOAT无铬钝化工艺。该工艺采用了高科技纳米技术,钝化溶液无毒,钝化膜薄,具有自修复性,耐腐蚀性高。中性盐雾试验出现白锈时间,直接采用ZECCOAT钝化,碱性镀锌为96 h-168 h,酸性镀锌为96 h-120 h;采用三价铬钝化加ZECCOAT钝化,碱性镀锌为648 h-936 h,酸性镀锌为192 h-504 h。ZECCOAT钝化膜性能和钝化成本与三价铬钝化加封闭工艺相当。
Development actuality about chromium-free pasivation technology was summarized.Chromium-free passivation includes two systems of both inorganic passivation and organic passivation,most of the pasivation technologies are in a phase of experimental research.ZECCOAT chromium-free passivation technology was introduced,the passivation technology is advanced,in which nano technology was used,the passivation solution is innoxious,the passive film is thinner and has self-repair property,and corrosion resistance of the passive film is excellent.Carrying out a salt spray test（NNS）,white rust time was 96 ~ 168 h for alkaline zinc plating and 96 ~ 120 h for acidic zinc plating,when ZECCOAT passivation was directly used.The white rust time was 648 ~ 936 h for alkaline zinc plating and 192 ~ 504 h for acidic zinc plating,when trivalent chromium passivation and following ZECCOAT passivation were used.Performance of ZECCOAT passive film and the passivation cost are consistent with trivalent chromium passivation with the addition of sealing.
出处
《涂装与电镀》
2011年第5期27-30,共4页
Painting and Electroplating
关键词
无铬钝化
无机物钝化
有机物钝化
镀锌
盐雾试验
耐腐蚀性
自修复性
chromium-free passivation
inorganic passivation
organic passivation
zinc plating
salt spray test
corrosion resistance
self-repair property
