Adsorption behavior of glycidoxypropyl-trimethoxy-silane on titanium alloy Ti-6.5Al-1Mo-1V-2Zr

被引：13

作者：

Liu, Jian-hua ^{[1
]}

Zhan, Zhong-wei ^{[1
]}

Yu, Mei ^{[1
]}

Li, Song-mei ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2013年 / 264卷

关键词：

Glycidoxypropyl-trimethoxy-silane (GTMS); Titanium alloy; Adsorption isotherm; XPS; Tafel; EIS; SOL-GEL COATINGS; DIFFERENT MICROSTRUCTURAL REGIONS; INORGANIC HYBRID COATINGS; CORROSION PROTECTION; EPOXY/ALUMINUM INTERFACE; GALVANIZED STEEL; ALUMINUM-ALLOY; CARBON-STEEL; GAMMA-APS; SURFACE;

D O I：

10.1016/j.apsusc.2012.10.054

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The adsorption behavior of glycidoxypropyl-trimethoxy-silane (GTMS) on titanium alloy Ti-6.5Al-1Mo-1V-2Zr was investigated by using X-ray photoelectron spectroscopy (XPS), Tafel polarization test, and electrochemical impedance spectroscopy (EIS). From the XPS results, it was found that the silane coverage on the titanium surface generally increased with GTMS concentration, with a slight decrease at concentration of 0.1%. Based on the relationship between isoelectronic point (IEP) of titanium surface and the pH values of silane solutions, adsorption mechanisms at different concentrations were proposed. The surface coverage data of GTMS on titanium surface was also derived from electrochemical measurements. By linear fitting the coverage data, it revealed that the adsorption of GTMS on the titanium alloy surface at 30 degrees C was of a physisorption-based mechanism, and obeyed Langmuir adsorption isotherm. The adsorption equilibrium constant (K-ads) and free energy of adsorption process (Delta G(ads)) were calculated to elaborate the mechanism of GTMS adsorption. Crown Copyright (C) 2012 Published by Elsevier B. V. All rights reserved.

引用

页码：507 / 515

页数：9

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