Effect of silane coating containing SiC nanoparticles on the corrosion behaviour of stainless steel 304

The purpose of the present research was to address the corrosion protection of silane-based coatings which were positioned on the 304 stainless steel substrate in a 0.1 M H2SO4 solution. To this aim, tetraethoxysilane, 3-(aminopropyl) triethoxysilane and silicon carbide (SiC) nanoparticles were coated onto the 304 stainless steel substrate using the sol-gel deposition method. Accordingly, the corrosion behaviour of the bare metal and the coated substrates was assessed through conducting potentiodynamic polarisation tests and electrochemical impedance spectroscopy. Furthermore, for the evaluation of surface properties, scanning electron microscope, a field emission scanning electron microscope, X-ray diffraction and attenuated total reflectance-Fourier transform infrared spectrometer were employed. The result obtained by corrosion studies revealed that the silane coating containing SiC nanoparticles exhibited superior corrosion resistance than the bare 304 stainless steel. A homogenous and highly adherent protective nanostructure coating was produced on the stainless steel substrates by the silane coating including nanoparticles.