Adherence measurements and corrosion resistance in primer/hot-dip galvanized steel systems

This paper focuses on the adherence during ageing of a primer (made of polyester resins crosslinked with melamine) applied onto hot-dip galvanized (HDG) steel for coil coating application and its influence on corrosion protection. A chromium-free surface treatment, composed of fluorotitanic acid, phosphoric acid, manganese phosphate, and vinylphenol was applied on the HDG steel to obtain high corrosion resistance and high adherence of a polyester and melamine primer. The influence of the manganese phosphate on the corrosion and adherence was investigated. To measure the adherence between the metal and the primer, a three-point flexure test was set up. The adherence was then linked with corrosion resistance during ageing, using electrochemical impedance spectroscopy

Marges urbaines, re-développement et gouvernance multi-échelles

Axe 4 : Les inégalités écologiques, École Nationale Supérieure des Mines de Saint-Étienne (ENSM-SE), Université Jean Monnet de Saint-Étienne (UJM), 19p.Rapport intermédiaire, Programme D2RT 2003 (PUCA-MEDD), Politiques territoriales et développement durable