Corrosion Inhibition of Mild Steel Using Emulsified Thiazole Adduct in Different Binder Systems

Abstract

Different blank formulations based on acrylic, short oil alkyd and urabrid AC100 emulsion resins have been studied with different pigment/binder ratios (P/B) in order to choose suitable formulations for corrosion inhibitor applications. A prepared and emulsified thiazole corrosion inhibitor, 3-mercapto-4-methyl-4-H-1, 2, 4-triazole/epoxydized soy bean oil adduct (3-MMT adduct) was incorporated in different emulsion paint formulations with constant optimum concentration. The role of binders in the corrosion inhibition of steel in the absence and the presence of the corrosion inhibitor has been studied. Physical, chemical and mechanical properties were measured for all pint films. Weight loss, corrosion resistance and water uptake tests have been analyzed in the absence and presence of the corrosion inhibitor. The corrosion inhibition efficiency of 3-MMT adduct was evaluated in different binders. It was found that, optimum pigment binder ratios are 1.6, 1.8 and 1.8 for acrylic, urabrid and alkyd blank samples, respectively. It was confirmed that 3-MMT adduct has a good compatibility with short oil alkyd, acrylic and urabrid AC 100 emulsion resins and can protect steel from corrosion. The protective properties of the three used binders against corrosion in the presence of constant concentration of the emulsified 3-MMT adduct can be arranged in the following order: Short oil alkyd > Urabrid AC 100 > Acrylic emulsion resins.