采用单因素试验确定了稀土钝化镀锌钢板的最佳工艺条件:30 g·L-1硝酸铈、20 mL·L-1双氧水、pH值3.5、40℃下钝化60s.利用碱浸失重试验、中性盐雾试验和电化学阻抗谱研究了钝化膜的耐蚀性能.结果表明,经稀土铈盐处理后的试样表面,其阻抗值相对于空白试样大幅度提高,腐蚀速率降低近1个数量级,抗白锈时间达46 h.扫描电镜(SEM)结果表明,稀土铈盐钝化膜对基体的覆盖度较高.
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