In this Research, The magnesium oxide-nickel oxide (MgO-NIO), nickel oxide-cobalt oxide (NiO-COO), and magnesium oxide-cobalt oxide (MgO-COO)-based mixed metal oxides (MMO) were synthesized by sol-gel method. The grafting of conductive polymers (CP), namely polyaniline (PANI), polyorthoanisidine (POA), and PANI-POA copolymer, is carried out on synthesized mixed metal oxide (MMO) by using a chemical oxidation method using ammonium persulfate (APS) as oxidizer, and the doping agent is used as hydrochloric acid (HCI) to make the MMO-CP composites. The synthesis of MMO-CP formation was confirmed with the FTIR, XRD, and UV-visible analysis. The epoxy-polyamide coating formulation is reinforced with MMO-CP composites at 4% (w/w) concentration, and the ultrasonication technique is used for uniform dispersion of MMO-CP into the coating formulation. The mild steel is used as a substrate for casting synthesized coating film, and curing is carried out at 90 °C. The mechanical analysis observed that hardness properties and scratch formation resistance are increased by reinforcement of MMO-CP, whereas chemical resistance remained unaffected. The corrosion resistance increased by incorporation of MMO-CP into the coating formulation, and it is evaluated by the salt spray analysis. The NIO-COO-POA composite-based coating performs excellently in pencil hardness, scratch resistance, and in the salt spray test.
Published by: Sp
May 16, 2023