CeO_(2)@Zr-MOF复合材料的制备及其对环氧涂层保护性能的提升作用  

Preparation of CeO_(2)@Zr-MOF Composites and Their Effect on Corrosion Protectiveness of Epoxy Coatings on Galvanized Steel Plate

作　　者：陈丽娟 晁刘伟 赵景茂[2] CHEN Lijuan;CHAO Liuwei;ZHAO Jingmao(Beijing Engineering Branch,China Petroleum Engineering&Construction Co.,Ltd.,Beijing 100085,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国石油工程建设有限公司北京设计分公司,北京100085 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《中国腐蚀与防护学报》2025年第3期664-674,共11页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52371046)。

摘　　要：以Ce(NO_(3))3作为铈源,通过水热合成法在Zr-MOF材料上合成了CeO_(2)。通过扫描电子显微镜、透射电子显微镜、X射线衍射仪、傅立叶红外光谱仪、X射线光电子能谱仪及比表面积分析仪等对复合材料的微观形貌、组织结构和表面元素组成进行分析。将CeO_(2)@Zr-MOF作为填料在不同比例下加入环氧树脂涂层中,通过电化学测试、盐雾测试、硬度测试、附着力测试和接触角测试等技术探究涂层的力学性能、疏水性、保护性能和保护机制。结果表明CeO_(2)成功负载于Zr-MOF上,制备的CeO_(2)@Zr-MOF形貌规整,颗粒均匀分布,粒径在200 nm左右,具有均匀且致密的孔结构,孔径主要分布在5~20 nm之间,颗粒平均比表面积为99.480 m2/g。CeO_(2)@Zr-MOF环氧树脂涂层硬度为11HV左右,较纯环氧树脂涂层提高了111.5%左右。涂层附着力为3 MPa左右,较纯环氧树脂涂层提升了18%左右。接触角为70°左右,较纯环氧树脂涂层提升了12°~14°。电化学测试结果表明添加CeO_(2)@Zr-MOF后的环氧树脂涂层防腐性能明显优于纯环氧树脂涂层。其中添加1%CeO_(2)@Zr-MOF的环氧树脂涂层在浸泡60 d后低频(0.01 Hz)阻抗模值为5.49×10^(10)Ω·cm^(2),比纯环氧树脂涂层高出3个数量级,并且经过400 h的盐雾实验后涂层划痕处几乎没有腐蚀痕迹,表现出对锌镁铝镀层钢板良好的腐蚀防护性能。In this study,CeO_(2) was synthesized on zirconium metal oxide skeleton(Zr-MOF)material by hydrothermal synthesis with Ce(NO_(3))3 as cerium source,ammonia as precipitant,and ethylene glycol as dispersant.The micro-morphology,structureand chemical composition of the composites were characterized by means of scanning electron microscope,transmission electron microscope,X-ray diffractometer,FTIR spectroscopy,X-ray photoelectron spectroscopy,and specific surface area analyzer.Then,as a filler,different amount of CeO_(2)@Zr-MOF was mixed with epoxy resin to prepare variouse CeO_(2)@Zr-MOF epoxy rein coatings on galvanized steel plate.Afterwards,the effect of CeO_(2)@Zr-MOF on the protectiveness,mechanical properties and hydrophobicityof the CeO_(2)@Zr-MOF coatings were investigated via electrochemical test,salt spray test,hardness test,adhesion test,and contact angle test etc.The results show that CeO_(2) particles were successfully deposited on the surface of Zr-MOF,while the prepared CeO_(2)@Zr-MOF has a regular morphology with CeO_(2) particles of mean diameter 200 nm uniformly distributed on the surface,which presents a uniform and dense porous structure with pore size ranging 5-20 nm,and average specific surface area of 99.48 m2/g;The hardness of the epoxy resin coating with CeO_(2)@Zr-MOF is about 11HV,which is about 111%higher than that of pure epoxy resin coating.The adhesion of the coating is about 3 MPa,which is about 18%higher than that of the pure epoxy resin coating,and the contact angle is about 70ºfor water,which is 12°-14°higher than that of the pure epoxy resin coating;The anticorrosive performance of CeO_(2)@Zr-MOF epoxy resin coating is significantly better than that of pure epoxy resin coating.Among them,the impedance modulus value of the epoxy resin coating with 1%CeO_(2)@Zr-MOF is 5.49×10^(10)Ω·cm^(2) at frequency 0.01 Hz after 60 d of immersion in 3.5%NaCl solution,which is three orders of magnitude higher than that of the pure epoxy resin coating.Furthermore after 400 h of salt spray tes

关 键 词：Zr-MOF CeO_(2) 有机涂层 镀锌钢板 腐蚀与防护 

分 类 号：TG174.4[金属学及工艺—金属表面处理]