摘要
石墨烯环氧富镁涂料以镁粉和石墨烯为关键用材,可对铝合金基材起到阴极保护作用。为揭示石墨烯富镁涂层腐蚀环境下防腐机理与性能,通过涂层微观结构分析、盐雾试验、附着力测试和实验室加速腐蚀试验,综合评价涂层耐蚀性能。试验结果表明,石墨烯富镁涂料与铝合金基材结合良好,涂层附着力>18MPa,耐中性盐雾>3000h,经过10个周期加速腐蚀试验,涂层未起泡,基材无腐蚀。石墨烯富镁涂料能减缓海洋环境下2A12铝合金材料腐蚀进程,为铝合金提供至少10年有效防护,为后期在飞机上应用提供参考。
Graphene epoxy magnesium-rich coating,which uses magnesium powder and graphene as the key materials,can provide cathodic protection to aluminum alloy substrate.To reveal the corrosion mechanism and performance of graphene magnesium rich coating under corrosion environment,the corrosion resistance of the coating was comprehensively evaluated by microstructure analysis,salt spray test,adhesion test and accelerated corrosion test in laboratory.The experimental results show that the graphene rich magnesium coating combines well with the aluminum alloy substrate.The adhesion of the coating is more than 18MPa,and the neutral salt spray resistance is more than 3000h.After 10 cycles of accelerated corrosion tests,the coating has no foaming and the substrate has no corrosion.Graphene magnesium-rich coatings can slow down the corrosion process of 2A12 aluminum alloy materials in marine environments,provide effective protection for aluminum alloys for at least 10 years,and provide guidance for following application on aircraft.
作者
丁永志
刘元海
慕仙莲
何卫平
金涛
赵连红
孙娜
Ding Yongzhi;Liu Yuanhai;Mu Xianlian;He Weiping;Jin Tao;Zhao Lianhong;Sun Na(Aviation Key Laboratory of Science and Technology on Structural Corrosion Prevention and Control,China Special Vehical Research Institute,Jingmen 448035,China)
出处
《航空科学技术》
2021年第9期57-62,共6页
Aeronautical Science & Technology
基金
航空科学基金(2018ZF05015)。
关键词
石墨烯
环氧富镁涂层
阴极保护
防腐性能
graphene
epoxy magnesium-rich coating
cathodic protection
anticorrosive performance
