热浸镀锌层磷酸盐-铈盐复合处理制备超疏水膜层研究  

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

作　　者：翁天宇 赖德林[1] 李晓聪 朱炎彬 车淳山[1] 邓文礼[1] 孔纲[1] WENG Tianyu;LAI Delin;LI Xiaocong;ZHU Yanbin;CHE Chunshan;DENG Wenli;KONG Gang(South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学材料科学与工程学院,广州510640

出　　处：《材料研究学报》2018年第11期801-810,共10页Chinese Journal of Materials Research

基　　金：国家自然科学基金(51373055)~~

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。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 curvemeasurement.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 300s,presents an electrochemical impedance two orders of magnitude superior to that of pure Zn,indicating a good corrosion resistance

关 键 词：金属材料 超疏水 磷化膜 铈盐 耐腐蚀 

分 类 号：TB34[一般工业技术—材料科学与工程]