摘要
将还原氧化石墨烯(rGO)与Fe_(3)O_(4)复合,以苯胺为还原剂还原制得rGO/Fe_(3)O_(4)二元纳米复合材料。然后苯胺在Fe_(3)O_(4)和r GO表面原位氧化聚合为聚苯胺(PANI,)最后用聚苯胺涂覆r GO/Fe_(3)O_(4)复合材料,并以水性环氧树脂(EP)为填料,制备出具有多层结构的r GO/Fe_(3)O_(4)/PANI/EP复合涂层。采用Tafel极化曲线、电化学阻抗谱和中性盐雾试验研究了r GO/Fe_(3)O_(4)/PANI/EP涂层的防腐蚀性能和机理。结果表明:与纯环氧树脂涂层和r GO/Fe_(3)O_(4)/EP涂层相比,r GO/Fe_(3)O_(4)/PANI/EP涂层的耐盐雾腐蚀性能最好,且具有更好的分散性和稳定性。石墨烯的高效阻隔性能和聚苯胺的电化学智能钝化构成了三元纳米复合材料的防腐蚀机理。
RGO/Fe_(3)O_(4)binary nanocomposites were prepared by combining restore oxidation graphene(rGO)with Fe_(3)O_(4)and reducing it with aniline as a reducing agent.Then aniline underwent in-situ oxidation polymerization on the surfaces of Fe_(3)O_(4)and rGO to form polyaniline(PANI).Finally,the rGO/Fe_(3)O_(4)composite material was coated with polyaniline,and a multi-layered rGO/Fe_(3)O_(4)/PANI/EP composite coating was prepared using waterborne epoxy resin(EP)as a filler.The corrosion resistance and mechanism of rGO/Fe_(3)O_(4)/PANI/EP coatings were studied using Tafel polarization curves,electrochemical impedance spectroscopy,neutral salt spray testing,and photoelectro spectroscopy.The results showed that the RGO/Fe_(3)O_(4)/PANI/EP coatings had the best salt spray resistance,good dispersion,and stability compared to pure epoxy coatings and rGO/Fe_(3)O_(4)/EP coatings.The anti-corrosion mechanism of the composite material was the high efficiency barrier performance of graphene and the electrochemical intelligent passivation effect of PANI enhanced by the ternary composite material.
作者
李红玲
李紫祎
杨阳
张皓杰
郎五可
LI Hongling;LI Ziyi;YANG Yang;ZHANG Haojie;LANG Wuke(Xinxiang University,Xinxiang 453000,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2024年第12期38-45,共8页
Corrosion & Protection
基金
国家自然科学基金资助项目(51902278)。
