Tuning F-doped degree of rGO:Restraining corrosion-promotion activity of EP/rGO nanocomposite coating  

作　　者：Lu Shen Yong Li Wenjie Zhao Kui Wang Xiaojing Ci Yangmin Wu Gang Liu Chao Liu Zhiwen Fang 

机构地区：[1]Key Laboratory of Marine Materials and Related Technologies,Zhejiang Key Laboratory of Marine Materials and Protective Technologies,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Science,Ningbo,315201,China [2]Public Technology Service Center,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Science,Ningbo,315201,China [3]Engineering Technology Research Center of Fluorocarbon Materials,Shandong Zhongshan Photoelectric Materials Co.,Ltd.,Zibo,255138,China

出　　处：《Journal of Materials Science & Technology》2020年第9期121-132,共12页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.51775540);the Youth Innovation Promotion Association,CAS(No.2017338);the Nature Science Foundation of Zhejiang(No.LQ19E030007);the Natural Science Foundation of Ningbo(No.2018A610114).

摘　　要：Given that graphene features high electrical conductivity,it is a kind of material with corrosion-promotion activity.This study aimed to inhibit the corrosion-promotion activity of graphene in coatings.Here,we report an exciting application of epoxy matrix(EP)/F-doped reduced graphene oxide(rGO)coatings for the long-term corrosion protection of steel.The synthesized F-doped rGO(FG)did not reduce the utilization of rGO by a wide margin and possessed distinctive electrically insulating nature.The electrical conductivity of rGO was approximately 1500 S/m,whereas those of FG-1,FG-2 and FG-3 were 1.17,5.217×10^−2 and 3.643×10^-11 S/m,respectively.FG and rGO were then dispersed into epoxy coatings.The chemical structures of rGO and FG were investigated by transmission electron microscopy(TEM),scanning probe microscopy(SPM),X-ray photoelectron spectroscopy(XPS),Fourier-transform infrared spectroscopy(FTIR),and X-ray diffraction(XRD).EP/FG coatings exhibited outstanding corrosion protection in comparison with blank EP and EP/rGO coatings mainly because the corrosion-promotion effect of rGO was eliminated.The anticorrosion ability of EP/FG coatingswasimproved with increased F-doped degree of FG.In addition,electrochemical impendance spectroscopy(EIS)results indicated that the Rc values of EP/FG-2 and EP/FG-3 were four orders of magnitude higher than those of EP/rGO in diluent NaCl solution(3.5 wt.%)after immersion for 90 days.

关 键 词：GRAPHENE F-doped rGO Electrically insulating nanofillers Long-term anticorrosion 

分 类 号：TB306[一般工业技术—材料科学与工程]