Abstract A pulse potential method (PPM) was used to regulate the formation of Cr(III) conversion coating (TCC) on hot-dip Zn-55 % Al-1.6 % Si. The micromorphology analysis and the contact angel measurement showed that the application of PPM changed the micro-features and hydrophobicity on the surface of TCC. Surface XPS analysis indicated that PPM increased the proportion of hydroxides and greatly reduced the content of Cr(VI) on TCC. Better corrosion resistance of the TCC was measured using multiple electrochemical methods when the pulse square-wave potential Ep = −0.10 V. The results corroborated the positive role of PPM in improving the temporary corrosion resistance of hot-dip coating.

中文翻译：

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脉冲电位法辅助热浸镀钢板三价铬转化涂层的构建和调节

摘要 采用脉冲电位法 (PPM) 调控 Cr(III) 转化膜 (TCC) 在热浸 Zn-55 % Al-1.6 % Si 上的形成。微观形貌分析和接触角测量表明，PPM的应用改变了TCC表面的微观特征和疏水性。表面 XPS 分析表明 PPM 增加了氢氧化物的比例并大大降低了 TCC 上 Cr(VI) 的含量。当脉冲方波电位 Ep = -0.10 V 时，使用多种电化学方法测量 TCC 更好的耐腐蚀性。结果证实了 PPM 在提高热浸镀层的临时耐腐蚀性方面的积极作用。