纳米二氧化铈对铝合金环氧镁铝复合涂层的防护作用研究
Research on the Protective Effects of Nano CeO2 on Epoxy Magnesium Aluminum Composite Coatings on Aluminum Alloy
张培 1郑琪 1聂国朝 1梁彩团 1刘括 1韦应 2周晓婷2
作者信息
- 1. 玉林师范学院 化学与食品科学学院,广西 玉林 537000
- 2. 玉林市食品药品检验检测中心,广西 玉林 537000
- 折叠
摘要
为了获得耐腐蚀性能较好的涂层,采用一定质量的铝粉代替镁粉,并添加纳米二氧化铈,制备了改性的铝合金表面环氧镁铝复合涂层.采用马丘测试、划叉浸泡实验、X 射线衍射分析、扫描电子显微镜等方法,研究了镁粉、铝粉及二氧化铈对环氧镁铝复合涂层的防护作用,并得到二氧化铈与镁粉和铝粉的协同保护机理.结果表明:当镁粉质量分数为30%、铝粉质量分数为 20%时,环氧镁铝复合涂层具有较好的耐腐蚀性能.纳米二氧化铈在涂层中的最佳填充量为5%时,可以増强复合涂层对铝合金基体的防护作用.镁粉、铝粉粒子在复合涂层中有大量的分布,粒径较大.少量的纳米二氧化铈粒子在复合涂层中呈球状分布、粒径较小,且涂层形貌均匀致密,屏蔽性能较好.改性后的复合涂层显著增强了铝合金在服役环境中的耐腐蚀性能.
Abstract
In order to obtain the coatings with better corrosion resistance performance,magnesium powders were replaced by a certain quality of aluminum powders to prepare the epoxy magnesium aluminum composite coatings with adding nano CeO2 on aluminum alloy.The effects of mag-nesium powder,aluminum powder and nano CeO2 on the protective effects of epoxy magnesium aluminum composite coatings on aluminum alloy were studied through Machu test,cross immersion experiment,X-ray diffraction and scanning electron microscope.Then the synergistic protec-tion mechanism of nano CeO2 with magnesium powders and aluminum powders was obtained.The results indicated that the epoxy magnesium alu-minum composite coating had good corrosion resistance when the amount of magnesium powders added was 30wt.%and the amount of aluminum powders added was 20wt.%.In addition,when the optimal filling amount of nano CeO2 in the coating was5wt.%,it could significantly enhance the protective effect of the epoxy magnesium aluminum composite coatings.Furthermore,the magnesium powders and the aluminum powder parti-cles had the large distribution and the large particle size in the composite coatings.A small amount of nano CeO2 particles with the smaller parti-cle size were distributed in spherical shapes in the composite coatings.The composite coatings were very uniform and dense with the good shiel-ding performance.Therefore,the modified composite coatings significantly enhanced the corrosion resistance of aluminum alloys in service envi-ronments.
关键词
环氧镁铝复合涂层/纳米二氧化铈粒子/铝合金/防护作用/耐腐蚀性能Key words
Epoxy Magnesium Aluminum Composite Coatings/CeO2 Nano Particles/Aluminum Alloy/Protective Effect/Corrosion Resistance引用本文复制引用
基金项目
玉林市科技研究与技术开发计划项目(玉市科202324145)
出版年
2024
国家科技期刊平台
NSTL
万方数据