Vegetable oil-based polybenzoxazine derivatives coatings on Zn–Mg–Al alloy coated steel

• DOI: 10.1016/j.corsci.2015.08.018
• Publication Date: 2015-08-08T18:22:55Z
• Authors: Matei Raicopol; Brindusa Bălănucă; Kirill Sliozberg; Bert Schlüter; Sorina Alexandra ...; Nicoleta Chira; Wolfgang Schuhmann; Corina Andronescu
• Keywords: 02 engineering and technology; 0210 nano-technology

Abstract Based on environmentally friendly (bio-based) precursor materials a new class of benzoxazine derivatives was synthesized using phenolated high oleic sunflower oil as phenol component and either aniline or 1,6-diaminohexane as amine components. Hydrophobic and dense poly(benzoxazine) coatings on Zn–Mg-Al alloy coated steel were obtained after spin-coating or air-brush type spray coating by crosslinking during a heat treatment step. The poly(benzoxazine)-coated ZM-steel samples showed an anodic shift of the open circuit potential as well as the break-through potential. Using an automatic scanning droplet cell the impact of the polymer film thickness on corrosion protection was evaluated.