热浸镀锌层磷酸盐-铈盐复合处理制备超疏水膜层研究

doi:10.11901/1005.3093.2018.173

材料研究学报

2018, Vol. 32

Issue (11): 801-810 DOI: 10.11901/1005.3093.2018.173

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热浸镀锌层磷酸盐-铈盐复合处理制备超疏水膜层研究

翁天宇, 赖德林, 李晓聪, 朱炎彬, 车淳山, 邓文礼, 孔纲(

)

华南理工大学材料科学与工程学院广州 510640

Preparation and Property of Superhydrophobic Phosphate-Cerium Composite Coatings on Hot-dip Galvanizing Carbon Steel

Tianyu WENG, Delin LAI, Xiaocong LI, Yanbin ZHU, Chunshan CHE, Wenli DENG, Gang KONG(

)

South China University of Technology, Guangzhou 510640, China

引用本文:

翁天宇, 赖德林, 李晓聪, 朱炎彬, 车淳山, 邓文礼, 孔纲. 热浸镀锌层磷酸盐-铈盐复合处理制备超疏水膜层研究[J]. 材料研究学报, 2018, 32(11): 801-810.
Tianyu WENG, Delin LAI, Xiaocong LI, Yanbin ZHU, Chunshan CHE, Wenli DENG, Gang KONG. Preparation and Property of Superhydrophobic Phosphate-Cerium Composite Coatings on Hot-dip Galvanizing Carbon Steel[J]. Chinese Journal of Materials Research, 2018, 32(11): 801-810.

全文: PDF(5753 KB) HTML

摘要:

在Q235钢上热浸镀锌后,经磷酸盐-铈盐-硬脂酸复合处理制备了超疏水膜层。采用接触角仪测定试样的接触角(WCA)和滚动角(WSA),研究了其疏水性;采用场发射扫描电子显微镜(FE-SEM)、能谱分析仪(EDS)、傅里叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)和X射线光电子能谱仪(XPS)研究试样的表面形貌和成分结构;采用电化学阻抗谱(EIS)和塔菲尔极化曲线(Tafel)研究试样的耐腐蚀性。结果表明,超疏水膜层通过界面空气膜层的捕获可以有效减少基体腐蚀,当硝酸铈处理时间为300 s时性能最好,在表面形成一层多孔的磷酸锌/ 铈盐微纳米复合结构;硬脂酸疏水改性后接触角达到162°,电化学阻抗增加了2个数量级,显示出良好的耐腐蚀性。

关键词 ：金属材料, 超疏水, 磷化膜, 铈盐, 耐腐蚀

Abstract：

A superhydrophobic phosphate-cerium salt composite coating was prepared on hot-dip galvanizing carbon steel via a two-step chemical conversion process, namely first traditional phosphating and then dipping in solution of cerium nitrate and stearic acid. The prepared coating was characterized in terms of surface morphology, chemical composition and structure by means of field emission scanning electron microscopy (FE-SEM), energy spectrum analyzer (EDS), fourier transform infrared spectroscopy (FTIR), X-ray diffractometer (XRD) and X-ray photoelectron spectroscopy (XPS). The hydrophobicity and corrosion performance of the prepared coating was assessed by means of contact angle- and sliding angle- measurement, as well as electrochemical impedance (EIS) and Tafel polarization curve measurement. Results show that the superhydrophobic coating can effectively reduce the corrosion through the interfacial air film. The contact angle of the coating can reach up to 162°. The coating, prepared by dipping in cerium salt solution for about 300 s, presents an electrochemical impedance two orders of magnitude superior to that of pure Zn, indicating a good corrosion resistance.

Key words： metallic materials superhydrophobic phosphate cerium film corrosion resistance

收稿日期: 2018-03-01

ZTFLH:

TB34

基金资助:国家自然科学基金(51373055)

作者简介:

作者简介翁天宇,男,1988年生,博士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2018.173 或 https://www.cjmr.org/CN/Y2018/V32/I11/801

图1 常规磷化处理300 s以及在经过铈盐处理试样(P300Ce300)试样的XRD谱图

图2 铈盐处理常规磷化300 s试样(P300Ce300)的XPS高分辨谱图

图3 硬脂酸(STA)、铈盐处理常规磷化膜(P300Ce300)以及再经硬脂酸改性后(P300Ce300STA)试样的红外光谱图

图4 P300Ce300STA的动态接触角

图5 铈盐处理常规磷化膜不同时间改性(P300CexSTA)的接触角和滚动角

图6 铈盐处理常规磷化膜300 s经硬脂酸改性后试样(P300Ce300STA)对不同pH值的水溶液的接触角和滚动角

图7 不同磷化时间制备的样品SEM图

图8 铈盐处理常规磷化膜不同时间后经硬脂酸改性试样(P300CexSTA)的SEM图

表1 图8中不同区域的EDS数据

图9 铈盐处理不同时间经硬脂酸改性后样品(P300CexSTA)在3.5% NaCl溶液中的EIS图

表2 图10中极化曲线的相关参数

图10 铈盐处理常规磷化膜不同时间并经硬脂酸改性后试样(P300CexSTA)在3.5%NaCl溶液中的极化曲线

图11 P300Ce300STA在3.5% NaCl溶液中浸泡不同时间后的EIS图

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