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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Curing Temperature on Corrosion Resistance of a Chromium-free Coating on Hot Dip Galvanized Steel Sheet
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Effect of Curing Temperature on Corrosion Resistance of a Chromium-free Coating on Hot Dip Galvanized Steel Sheet

机译：固化温度对热浸镀锌钢板无铬涂层耐蚀性的影响

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In this work, tannic acid powder, fluoro titanic acid solution and colloidal silica were used to prepare acoating on a hot dip galvanized steel sheet. The pH value of the passivating solution ranges between2~7, and the curing temperature is 20 °C, 60 °C, 80 °C and 100 °C. The interface connectivity of thecoating was investigated using a Fourier transform infrared spectrometer. Microstructures of thecoating were observed using a field-emission scanning electron microscope equipped with an energydispersive spectrometer and an X-ray photoelectron spectrometer. The corrosion resistance of thecoating was studied using an electrochemical workstation. The results show that the coating thicknessincreased with increasing curing temperature. A coating thickness of 0.62 μm is achieved with a curingtemperature of 100 °C; at this temperature, the corrosion potential Ecorr is 410.5 mV, and thepolarization resistance (Rp) is 2.13×106 cm-2 ohms. These conditions provided the best corrosionresistance of the coating.
机译：在这项工作中，使用鞣酸粉，氟钛酸溶液和胶体二氧化硅在热浸镀锌钢板上制备涂层。钝化溶液的pH值范围为2〜7，固化温度为20℃，60℃，80℃和100℃。使用傅立叶变换红外光谱仪研究了涂层的界面连通性。使用配备有能量分散光谱仪和X射线光电子能谱仪的场发射扫描电子显微镜观察涂层的微观结构。使用电化学工作站研究了涂层的耐腐蚀性。结果表明，随着固化温度的升高，涂层厚度增加。固化温度为100°C时，涂层厚度为0.62μm;在此温度下，腐蚀电位Ecorr为410.5 mV，极化电阻（Rp）为2.13×106 cm-2欧姆。这些条件提供了涂层的最佳耐腐蚀性。

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