Determination of optimum concentration of cloisite in an eco-friendly silane sol-gel film to improve corrosion resistance of mild steel

Study on the protective function of cloisite incorporated silane sol–gel coatings cured at different conditions

“…10). For sample T1, the Si-O-Si peak at 950-1200 cm − 1 (Zandi Zand et al, 2012) appeared at lower intensity whereas the intensity of the broad band in the range 2800-3600 cm − 1 which is assigned to the residual Si-OH and hydrogen-bonded water (Asadi et al, 2014a;Fedel et al, 2014) was increased. On the other hand, the spectra implied an increase in the condensation reaction rate ensuring the stronger Fig.…”

“…In addition, the good barrier properties can be also explained by the increase of the pathway of oxygen and water due to dispersion of cloisite in the sol-gel matrix as well as irregularly shaped, flaky and plate-like particles of clay (Seifzadeh and Golmoghani-Ebrahimi, 2012). According to the literature (Asadi et al, 2014a;Seifzadeh and Golmoghani-Ebrahimi, 2012), the interaction between the nanoparticles and silanol groups, resulting in strong reticulated network, can play an important role in the coating barrier properties. In the previous publication (Ansari et al, 2015), it was indicated that the enhanced barrier properties in the presence of cloisite could be associated with the reaction of silanol groups with NaMt nanoparticles.…”

Effect of synthesized NiFe 2 O 4 -silica nanocomposite on the performance of an ecofriendly silane sol–gel coating

“…7 showing the FTIR spectra of powders of neat silane and silane with 1000 ppm of the nanoparticles. By adding the nanoparticles to the hybrid coating, the peak in the range of 900 to 1100 cm −1 which is ascribed to Si-O-Si enlarged while the intensity of the silanol peak at 3200-3500 cm −1 decreased [45][46][47]. This could indicate the reaction of silanol groups with the surface of nanoparticles which modifies the barrier properties through formation of a denser film.…”

TiO2 coated multi-wall carbon nanotube as a corrosion inhibitor for improving the corrosion resistance of BTESPT coatings

“…In bode plot, the impedance at high frequency corresponds to the property of the film, concerned with the compactness and hydrophobic property of the film, while the impedance modulus at low frequency is related to the corrosion resistance [32,33]. High impedance in sample is ascribed to an area effect where the coating is blocking the aggressive electrolyte from reaching the reactive metal surface.…”