氟化石墨/氟碳复合涂层耐磨防腐性能研究  

Wear-Resisting and Anti-Corrosion Performance of Fluorinated Graphite/Fluorocarbon Composite Coatings

作　　者：周少锋[1] 张瑛 刘亚青[1] 赵贵哲[1] ZHOU Shaofeng;ZHANG Ying;LIU Yaqing;ZHAO Guizhe(Shanxi Province Key Laboratory of Functional Nanocomposites,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中北大学,纳米功能复合材料山西省重点实验室,山西太原030051

出　　处：《润滑与密封》2022年第4期66-75,共10页Lubrication Engineering

基　　金：山西省科技重大专项项目(20181102014)。

摘　　要：以氟化石墨(FGi)填充改性氟碳(FEVE)涂料,制备氟化石墨/氟碳(FGi/FEVE)复合涂层,并对其附着力、硬度以及耐磨防腐性能等进行分析,探讨其耐磨防腐作用机制。结果表明:FGi中C-F键的存在,不仅增加了涂层与填料之间的界面相容性,进一步增强复合涂层的热稳定性,提升附着强度与硬度,同时具有优异的疏水性能,使涂层表面接触角由84.5°提升至102.0°。电化学测试表明,质量分数1%FGi改性FEVE复合涂层的低频阻抗模量为3.1×10^(5)Ω·cm^(2),与纯FEVE涂层相比,提升了近1个数量级,表明复合涂层具有更好的防腐性能。这归因于FGi与固化剂N75之间形成的氢键,增加了FGi在FEVE涂层中的分散性,能更有效阻止腐蚀介质的渗透。摩擦测试表明:质量分数1%的FGi可以使FGi/FEVE复合涂层的摩擦因数降低16.9%、磨损率降低48.0%。FGi填充改性增强了FEVE涂层的电绝缘性和疏水性,同时发挥物理屏障作用,能有效防止基底受到腐蚀并阻止裂纹扩展,从而有效提升了FGi/FEVE复合涂层的耐磨防腐性能。Fluorinated graphite/fluorocarbon(FGi/FEVE)composite coating was prepared by modifying FEVE with FGi, its adhesion, hardness, wear resistance and anti-corrosion performance were analyzed, and the wear resistant and anti-corrosion mechanism was discussed.The results show that the presence of the C-F bond in FGi not only increases the interface compatibility between the coating and the filler, further enhances the thermal stability of the composite coating, improves the adhesion strength and hardness, but also has excellent hydrophobic properties, which increases the contact angle of the coating surface from 84.5° to 102.0°.Electrochemical test result shows that the low frequency impedance modulus of FEVE composite coating modified by 1% FGi is 3.1×10^(5)Ω·cm^(2),which is nearly one order of magnitude higher than that of pure FEVE coating, indicating that the composite coating has better anti-corrosion performance on the steel substrate.This is attributed to the hydrogen bond formed between FGi and the curing agent N75,which increases the dispersion of FGI in FEVE coating and can more effectively prevent the penetration of corrosive media.Friction test result shows that adding 1% FGi can reduce the friction coefficient of FEVE coating by 16.9% and the wear rate by 48.0%.FGi modification enhances the electrical insulation and hydrophobicity of FEVE coating, and plays the role of physical barrier, it can effectively prevent substrate from corrosion and crack expansion, so as to effectively improve the anti-corrosion and wear resistance of FGi/FEVE composite coating.

关 键 词：氟化石墨 氟碳涂层 耐磨防腐 复合涂层 疏水性 

分 类 号：TQ637.2[化学工程—精细化工]