this work is aimed to evaluate the role of nanoclay in the protective performance of an eco-friendly silane sol-gel layer applied on mild steel substrate in 0.1m sodium chloride solution. at the first step, the effect of ph of the silane solution, consisting of a mixture of γ-glycidoxypropiltrimethoxysilane and methyltriethoxysilane and tetraethoxysilane, on the coating performance was evaluate...

This work is aimed to evaluate the role of nanoclay in the protective performance of an eco-friendly silane sol-gel layer applied on mild steel substrate in 0.1M sodium chloride solution. At the first step, the effect of pH of the silane solution, consisting of a mixture of γ-glycidoxypropiltrimethoxysilane and methyltriethoxysilane and tetraethoxysilane, on the coating performance was evaluate...

This thesis considers a nanotechnology approach based on the production of metals pre-treatments and organic coatings (a complete protection system at all) designed from the nanoscale. The final aim is to develop protection systems with improved corrosion protection properties and a low environmental impact. In particular, multifunctional silane hybrid molecules were used to design sol-gel pre-...

to improve the corrosion protection of copper metal, 0.01m concentration of 1h-1,2,4-triazole-3-thiol (tat) was incorporated into the hybrid sol-gel monolayers containing 3-glycidoxypropyltrimethoxysilane (gptms) and tetraethoxysilane (teos). it was further subjected to hydrolysis and condensation reaction to form a sol-gel matrix. the tat-doped hybrid sol-gel coating was applied over the coppe...

nanostructured alumina thin films were coated on stainless steel by sol-gel dip coating method. in order to prevent crack formation, al2o3 films were kept in a solvent bath immediately after coating to reduce the rate of drying. effects of calcination temperature and withdrawal speed on structural properties were analyzed using xrd and sem. topography and thickness of coatings were analyzed by ...

Abstract Mg alloys are considered a promising alternative to use as biodegradable implants. However, the main limitations of these high susceptibility hydrogen evolution and corrosion. Consequently, it is necessary control corrosion rate through surface treatment techniques. In this regard, double layer system, based on first deposition MgO coating subsequent an organo-silane sol-gel (anodized/...

this article describes the preparation and analysis of nano hydroxyapatite (ha) films on stainless steel 316l through sol-gel technique. the process started with preparation of a nitrate and phosphate sol. after aging the sol for 24 h at room temperature a ss316 substrate was dip-coated and heat-treated at 350 to 450 °c for different times in air. the coating phase and structure on substrate we...

The sol-gel process is an innovative advanced method, initially developed to synthesize glass and ceramics at low temperature. Sol-gel can be used synthesis materials with a variety of shapes, such as porous membranes, thin fibers, nano-size powders films. In this study, epoxy methacrylate based silane coupling agents are together zirconium oxide form hybrid coating system on surface. the exper...

We report on the fabrication and characterization of thick UV-patternable hybrid sol-gel films by spin coating using a modified sol-gel process. Thick coating of 25 microns with crack-free surface can be produced by one spin coating step. Thick layers of more than 100 μm can be obtained with a multi-coating process. Characterization using different techniques including optical microscope and at...

Three kinds of lipases (from Candida antarctica, Pseudomonas cepacia, and Pseudomonas fluorescens) were encapsulated in inorganic matrices by the sol-gel method in order to synthesize chiral compounds by kinetic resolution. Sol-gel lipases prepared with vinyltriethoxysilane had higher hydrolysis activity for 2-octyl acetate than those with other silane precursors: tetramethoxysilane, methyltrim...