Phenolated Oleic Acid Based Polybenzoxazine Derivatives as Corrosion Protection Layers

Abstract

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.

Design and Synthesis of Bio-Based Benzoxazines

“…In consequence, for the last 5 years, the number of studies related to bio-based benzoxazines is exploding as a consequence of the versatility of the design of the chemical structure of their monomers [16]. Some applications of bio-based polybenzoxazine anticorrosive coatings have already been reported, confirming the great interest in the development of new bio-based PBz with promising physical and mechanical properties for industrial applications [17].…”

Synthesis, characterization and protective efficiency of novel polybenzoxazine precursor as an anticorrosive coating for mild steel

“…P-phenylene diamine benzoxazine and commercial bisphenol A based on benzoxazine also was utilized as a corrosion-resistant coating on 1050 aluminum alloy 25 . Recent studies have shown the efficiency of PBZ derivatives developed from bio-based materials, including vegetable oil, in inhibiting the corrosion of steel covered with Zn–Mg–Al alloy 15 , 26 , 27 . These studies revealed that PBZs could be used as corrosive environmental materials 28 .…”

Construction of novel polybenzoxazine coating precursor exhibiting excellent anti-corrosion performance through monomer design

“…To prevent the deterioration of carbon steel in a sulfuric environment, soybean (SE) was used [ 30 ]. Phenolated methyl oleate, a diamine-based polybenzoxazine with long alkyl chains, was utilized as an anti-corrosive coating on steel coated with a Mg–Al–Zn alloy [ [30] , [31] , [32] ]. Pyrimidine derivatives have been reported to be effective and environmentally friendly corrosion inhibitors, particularly in acidic conditions [ 33 ].…”