Studies on epoxy-butylated melamine formaldehyde-based anticorrosive coatings from a sustainable resource

In situ epoxidation of linseed oil (LO) was carried out as per previously reported method. Epoxidised oil (LOE) was further hydroxylated (HLOE) and cured with butylated melamine formaldehyde (BMF), in varying weight percentages (10–30 wt.% on the weight of epoxy resin) to develop coating materials. Structural elucidation of HLOE and HLOE–BMF system was performed by IR, 1H NMR and 13C NMR spectroscopic analyses. Physico-chemical characterization was carried out by standard methods. Thermal stability and curing behaviour of these systems were investigated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), respectively. HLOE–BMF systems were applied over mild steel strips of standard sizes to evaluate their physico-mechanical and chemical resistance performance. It was found that, among all resin compositions, HLOE-30 exhibited far better coating properties.