Evaluation of adhesion and corrosion wear resistance of biobased polymers derived from linseed oil deposited on Fe-Zn sheets

The objective of this paper is to study adherence and corrosion wear resistance of biobased polymers derived from epoxidized linseed oil (ELO) deposited on galvanized iron sheets. The adhesion and anticorrosive properties of the pure epoxy resin (ELO) were compared with those that contained bisphenol A (BFA) and carbon black (CB), which were polymerized by oxirane ring opening catalyzed by aluminum triflate (ATf). Fourier Transform Infrared Spectroscopy (FTIR) confirmed the formation of the different biobased polymers as coatings. To evaluate the performance to the corrosion resistance each coating was tested to adhesion and accelerated weathering within a salt spray chamber. The use of BFA provided greater adhesion than pure ELO coatings. Additionally, the addition of small loads of CB improved the appearance, adhesion, and durability of the coating, thus decreasing the corrosion of the galvanized sheets. Finally, the interactions that occur at the interface between the different polymeric matrices and the substrate surface, which allow improving the corrosion resistance were analyzed.