Properties of hydrophobic carbon-PTFE composite coating with high corrosion resistance by facile preparation on pure Ti  

在纯钛表面制备疏水和抗腐蚀性碳-PTFE复合涂层的性能（英文）

作　　者：Mei-lian GAO Xiao-bo WU Ping-ping GAO Ting LEI Chun-xuan LIU Zhi-yong XIE 高美连;伍小波;高平平;雷霆;刘春轩;谢志勇(湖南工业大学冶金与材料工程学院,株洲412000;中南大学粉末冶金国家重点实验室,长沙410083;湖南工程学院汽车传动与动力系统湖南省重点实验室,湘潭411104;湖南金天铝业高科技股份有限公司,长沙410205)

机构地区：[1]College of Metallurgy and Materials Engineering,Hunan University of Technology,Zhuzhou 412000,China [2]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China [3]Hunan Provincial Key Laboratory of Vehicle and Transmission System,Hunan Institute of Engineering,Xiangtan 411104,China [4]Hunan Gold Sky Aluminum Industry High-tech Co.,Ltd.,Changsha 410205,China

出　　处：《Transactions of Nonferrous Metals Society of China》2019年第11期2321-2330,共10页中国有色金属学报（英文版）

基　　金：Project(2018YFB1502500) supported by the National Key Research and Development Program of China;Project supported by State Key Laboratory of Powder Metallurgy,Central South University,China;Projects(21506258,51774127) supported by the National Natural Science Foundation of China;Project(2019RS2067) supported by the Science and Technology Planning Project of Hunan Province,China

摘　　要：Composite coatings consisting of carbon and polytetrafluoroethylene(PTFE) were prepared on Ti alloy substrate by a simple two-step process of hydrothermal and impregnation. The morphology, composition, hydrophobic and corrosion properties of the composite coatings were characterized by scanning electron microscopy(SEM), Fourier transform infrared spectroscopy(FTIR), water contact angle method, X-ray photoelectron spectroscopy(XPS) and electrochemical technique, respectively. The effect of PTFE content on the corrosion properties of the composite coatings was studied. It is found that the composite coating film exhibits a full coverage with uniformly distributed PTFE when 0.1 mol/L of glucose is used as carbon source and 20 wt.% PTFE suspension as impregnating solution. The coating with 20 wt.% PTFE has a good bonding strength with Ti plate and exhibits excellent hydrophobic property with a water contact angle of 142.3° as well as superior corrosion resistance with corrosion current density as low as 0.0045 μA/cm^2. With regard to its excellent hydrophobicity and corrosion resistance, the carbon-PTFE composite coating may find potential application in automobiles and metal corrosion industries.采用水热法和浸渍法两步工艺在钛板上制备由碳和聚四氟乙烯(PTFE)组成的复合涂层。采用扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)、水接触角计、X射线光电子能谱(XPS)和电化学技术对复合涂层的形貌、组分、疏水和腐蚀性能进行表征,研究不同聚四氟乙烯浓度的浸渍液对复合涂层腐蚀性能的影响。结果表明,当以0.1 mol/L的葡萄糖溶液为碳源、20 wt.%PTFE悬浮液为浸渍液时,聚四氟乙烯均匀分布于所获得的碳复合涂层表面。20 wt.%PTFE浸制的碳涂层与钛板具有良好的结合强度和疏水性,此时润湿角为142.3°,且涂层耐腐蚀性能良好,腐蚀电流密度低至0.0045μA/cm2。因此,钛基体上制备的碳PTFE复合涂层具有良好的疏水性和耐腐蚀性,在汽车和金属防腐工业中具有较好的应用前景。

关 键 词：carbon coating Ti plate polytetrafluoroethylene hydrothermal method HYDROPHOBICITY corrosion resistance 

分 类 号：TG1[金属学及工艺—金属学]