Silane

Sol-gel

Dielectric spectroscopy

Engineering

Thermogravimetric analysis

Curing (chemistry)

Electrochemistry

Metallurgy

Materials science

Coating

Chemical engineering

Salt spray test

Physical chemistry

Contact angle

Nanotechnology

Organic chemistry

Hydrolysis

Composite material

Corrosion

Chemistry

Electrode

Fourier transform infrared spectroscopy

Silanes

Progress in Organic Coatings

This study aims at studying the effect of silane hydrolysis time and concentration on the corrosion protection performance of an eco-friendly hybrid silane coating based on tetraethylorthosilicate (TEOS) and trimethoxymethylsilane (TMOMS) on mild steel substrate. By electrochemical impedance spectroscopy (EIS) and salt spray test the corrosion evaluations were done. Results of Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and water contact angle tests measurements revealed the effective impact of the hydrolysis time and silane concentration on the curing process of the coating. Results revealed that the mixture of 50% silanes (TEOS/ TMOMS: 50/50 w/w) hydrolyzed for 24 h resulted in the highest corrosion resistance. The enhancement in protective performance of the hybrid coating was connected to the better condensation reaction, denser Si–O–Si network formation and less hydrophilicity of the coating.

Evaluation of the corrosion protection performance of mild steel coated with hybrid sol-gel silane coating in 3.5 wt.% NaCl solution