铁酸镍复合环氧富Zn-Al涂层的制备及防腐性能研究  

Preparation and their Corrosion Resistances of NiFe_(2)O_(4)/Zn-Al-rich Epoxy Coatings

作　　者：陈贤 汪永民 李强[1] 吴健 陶学伟[1,2] 巴志新 CHEN Xian;WANG Yongmin;LI Qiang;WU Jian;TAO Xuewei;BA Zhixin(School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Jiangsu Province Advanced Structural Materials and Application Technology Laboratory,Nanjing 211167,China)

机构地区：[1]南京工程学院材料科学与工程学院,江苏南京211167 [2]江苏省先进结构材料与应用技术重点实验室,江苏南京211167

出　　处：《铸造技术》2022年第4期264-269,共6页Foundry Technology

基　　金：国家自然科学基金(51701093)。

摘　　要：向环氧涂层中添加纳米铁酸镍(NiFe_(2)O_(4))、鳞片状Zn粉与Al粉制备出铁酸镍复合环氧富Zn-Al涂层。采用扫描电子显微镜、能谱仪、电化学测试及中性盐雾试验等研究了涂层的表面形貌、组成及其在腐蚀环境中的腐蚀行为。结果表明:纳米铁酸镍有效填充了环氧富Zn-Al涂层内部交叠金属粉末之间的孔隙,提高了涂层致密性,同时其阳离子选择性增强了涂层阻碍腐蚀介质渗入能力;与环氧富Zn-Al涂层相比,复合涂层的耐蚀性能明显提高,且经盐雾试验720 h后,涂层表面完整,无明显腐蚀点。The NiFe_(2)O_(4)/Zn-Al-rich epoxy coating was prepared by addition of NiFe_(2)O_(4)nanoparticles, flaky Zn powder and Al powder into epoxy coating. The surface morphology, composition and corrosion behavior of the coating in corrosive environment were studied by scanning electron microscope(SEM), energy dispersive spectrometer(EDS), electrochemical test and neutral salt spray test. The results show that the nanoparticles NiFe_(2)O_(4)effectively fills the pores between the overlapping metal powders in the epoxy Zn-Al coating, improving the compactness of the coating, and the cationic selectivity enhances the ability of the coating to prevent the infiltration of corrosive media. Compared with the epoxy Zn-Al rich coating, the corrosion resistance of the composite coating is obviously improved. After 720 h salt spray test, the coating surface is intact without obvious corrosion point.

关 键 词：环氧树脂 铁酸镍 耐腐蚀性 盐雾腐蚀 

分 类 号：TG148[一般工业技术—材料科学与工程]