烘干温度对热镀锌层钝化膜形貌及耐腐蚀性能的影响

Plating and Finishing(2014)

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Abstract
在3.5%NaCl溶液中,用电化学方法测定了未钝化热镀锌层、钝化后烘干θ为270℃、320℃镀锌层的极化曲线;对三种镀层进行96h中性盐雾试验;用扫描电子显微镜对2种钝化膜表面形貌及成分进行分析.结果表明,在3.5% NaCl溶液中,钝化镀层耐腐蚀性能明显优于未钝化镀层;烘干温度过高,导致钝化膜开裂严重,镀层耐腐蚀性能降低.
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Key words
zinc coating passivation films,corrosion resistance
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