Characterization by different analytical techniques of SiO2 and silane thin films deposited on rough hot-dip galvanized steel surfaces

► SiO2 and silane coatings deposited on rough hot dip galvanized steel substrates. ► Analytical characterizations reveal obtained coatings distribution and thickness. ► SiO2 coating is rather homogeneous in thickness whatever substrate surface. ► Silane coating is not homogeneous in thickness, especially on rough surfaces. ► Used spot size has a crucial influence on the results of measurements.