PRODUCTION OF COMPOSITE POLYANILINE/SiO2 FOR APPLICATION IN EPOXY COATING AND INVESTIGATE OF THE ANTICORROSION PROPERTIES FOR CT3 STEEL

Abstract

This paper presents the problem of enhancing the protective effect of CT3 steel surface in tropical climates by coatings containing polyaniline/SiO₂ (PANi/SiO₂). Polymer PANi/SiO₂ was synthesized by chemical polymerization in an acidic environment with a molar concentration of 1M and a strong oxidizing agent, then mixed into epoxy paint and applied to CT3 steel surface to perform anticorrosion test. We found that when SiO₂ was added to polyaniline polymer (PANi) and mixed with epoxy, the mechanical strength and corrosion resistance were significantly improved compared to paints containing only PANi polymer. In the test ratios, paint with component ratio PANi/SiO₂ = 1/1 gave the best results in terms of adhesion of 2.2 MPa, impact strength of 15 kg.cm, stable film surface after 3 months of natural testing in a humid tropical climate.