Improving Corrosion Resistance of Powder Coating Systems for ACE Applications

By Roberto Cavalieri, Alessandro Minesso, Robertino Chinellato, Stefan Smeets,

A new generation of modified superdurable polyesters for powder coatings that demonstrates improved corrosion resistance for ACE (agriculture and construction equipment) applications has been developed. The ß-hydroxy-alkyl-amide hardened binders based on these polyesters are expected to close the observed performance gaps of novel anticorrosion pretreatment solutions, like nano-ceramics or titanium/zirconium systems, relative to current systems such as zinc or iron phosphate on steel and yellow chromate on aluminum surfaces.

The objective of this article is to present findings that show improved corrosion resistance after salt spray tests on both pretreated and untreated shot-blasted substrates for ACE applications. The article also covers their potential use in more general industry applications and introduces preliminary results in extending the program to binders based on triglycidyl-isocyanurate.