Influence of a nanometric organosilane film on the corrosion behaviour of zinc coating

Gedvidas Bikulčius; Dalia Bučinskienė; Vitalija Jasulaitienė; Algirdas Narkevičius

doi:10.6001/chemija.2014.25.3.1

Gedvidas Bikulčius
Dalia Bučinskienė
Vitalija Jasulaitienė
Algirdas Narkevičius

DOI: https://doi.org/10.6001/chemija.2014.25.3.1

Keywords: zinc, organosilane, phosphate, heating, corrosion, XPS

Abstract

Zinc coatings treated by organosilane were investigated as environment-friendly replacements of the existing chromating processes. The aim was to compare the corrosion resistance of zinc coatings plated with organosilane, polyphosphate / organosilane with subsequent heat treatment at different temperatures. The corrosion resistance of organosilane coatings on zinc was examined by the neutral salt spray (NSS) method. Characterization of the organosilane coatings was performed by x-ray photoelectron spectroscopy (XPS). It has been found that zinc coating treatment with polyphosphate and subsequent treatment in organosilane with two hour heating at a temperature of 70 °C make it possible to achieve corrosion resistance close to that of chromated zinc coatings.