期刊
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
卷 29, 期 11, 页码 2321-2330出版社
ELSEVIER
DOI: 10.1016/S1003-6326(19)65138-1
关键词
carbon coating; Ti plate; polytetrafluoroethylene; hydrothermal method; hydrophobicity; corrosion resistance
资金
- National Key Research and Development Program of China [2018YFB1502500]
- State Key Laboratory of Powder Metallurgy, Central South University, China [21506258, 51774127]
- National Natural Science Foundation of China
- Science and Technology Planning Project of Hunan Province, China [2019RS2067]
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 degrees as well as superior corrosion resistance with corrosion current density as low as 0.0045 mu A/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.
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