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热浸镀锌板钼酸盐钝化液的再生研究

Ting-ting HUANG,Wan-qiu ZHOU,Yu-ling WANG,Xin LI,Shi-gang XIN,Yan-hong KANG

Electroplating & Finishing（2015）

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Abstract
针对热浸镀锌钢板用钼酸盐钝化液易失效的问题,研制了一种以H2O2为主要成分的氧化型添加剂,并往失效钝化液中加入该添加剂使其得以再生.采用电化学方法、中性盐雾(NSS)试验和扫描电镜对比研究了新配钝化液、失效钝化液和再生钝化液所得转化膜的性能.往失效钝化液中加入添加剂后,极化曲线的阳极分支重新出现钝化特征,即失效钝化液恢复钝化能力.再生钝化液所得转化膜表面平整、均匀,耐蚀性(保护等级4级)与新配钝化液所得转化膜相当.
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