Phenolated Oleic Acid Based Polybenzoxazine Derivatives as Corrosion Protection Layers

• Published in: ChemPlusChem (Weinheim, Germany) Vol. 80; no. 7; pp. 1170 - 1177
• Main Authors: Bălănucă, Brindusa, Raicopol, Matei, Maljusch, Artjom, Garea, Sorina, Hanganu, Anamaria, Schuhmann, Wolfgang, Andronescu, Corina
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.07.2015; WILEY‐VCH Verlag; Wiley
• Subjects: benzoxazines; Chemistry; Chemistry, Multidisciplinary; coatings; corrosion protection; Physical Sciences; polybenzoxazines; Science & Technology; Zn-Mg-Al coated steel; benzoxazines; POLYMERS; Zn-Mg-Al coated steel; corrosion protection; polybenzoxazines; AROMATIC-COMPOUNDS; coatings; STEEL; VEGETABLE-OILS; BENZOXAZINE; RING; VANILLIN; RESISTANCE
• ISSN: 2192-6506; 2192-6506
• DOI: 10.1002/cplu.201500092

Benzoxazine derivatives were synthesized using phenolated methyl oleate and either aniline, 1,6‐diaminohexane, or 4,4′‐diaminodiphenylmethane, respectively, as amine components. Polymerization of the benzoxazine derivatives led to the formation of hydrophobic and dense coatings on Zn‐Mg‐Al alloy coated steel sheets for passive corrosion protection. The polybenzoxazine coatings which are formed by crosslinking during a heat‐treatment step invoked a substantial anodic shift of the open‐circuit potential as well as the breakthrough potential in potentiodynamic measurements. The proposed polybenzoxazine derivatives pave the way for a new type of passive polymer protection system based on sustainably obtained precursor components. Leave your coat on: Benzoxazine derivatives based on phenolated methyl oleate and either aniline, 1,6‐diaminohexane, or 4,4′‐diaminodiphenylmethane are the basis for dense, hydrophobic coatings on Zn‐Mg‐Al alloy coated steel for passive corrosion protection. The polymer coatings invoke a substantial anodic shift of the open‐circuit potential and the breakthrough potential in potentiodynamic measurements (see figure).