Anticorrosion properties of silica-based sol-gel coatings on steel – The influence of hydrolysis and condensation conditions

In this paper, we present indirect methods to define the change in rates of hydrolysis and condensation reactions a silica oxide network formed (3-glycidoxypropyl)methyltriethoxysilane (GPTMS) (3-aminopropyl)triethoxysilane (ApTEOS), which was strongly dependent upon nature solvent used reaction environment, such as methanol, ethanol, propanol, butanol acetone. Electron microscopy (SEM), focused ion beam scanning electron (FIB), Raman spectroscopy were investigate morphology structure changes. UV-VIS spectrometry, wettability test, scratch test electrochemical tests, namely Tafel's polarization impedance (EIS), analyze functional changes obtained coatings. The coating synthesized methanol environment showed resistance (Rp) almost an order magnitude greater than those other organic solvents. greatest thickness, nearly 1.5 um, with ethanol based Almost twice much force (near 11 N) required detach acetone coatings, compared Propanol contribute defects created decreased protection properties final materials show statistically significant influence on corrosion film under sol-gel particularly for coatings propanol. No solvents observed thickness prepared or