Preparation, and Evaluation of waste ground tyre rubber as Antioxidant, Antibacterial Activity and anticorrosion inhibitor for N80 steel in 0.1N H3PO4

Abstract

In this work, polybutadiene (PBD) was prepared from waste tires. The halogenated of polybutadiene was grafted with mono, di, and triethanolamine, the grafting was studied by X-ray diffraction and scanning electron microscopy. And according to the thermal characteristics (TGA and DSC), the produced compound was thermally stable up to 202 °C. Using potentiodynamic polarization techniques, the adsorption and corrosion inhibiting effects of three grafting polymers on N80 steel in 0.1 N H3PO4 as aggressive environments were measured at four different temperatures: 25, 35, 45, and 55°C. The prepared polymers have excellent inhibition efficiency at high temperatures. The pBut-g-mono ethanol amine is the corrosion inhibitor that is most effective in all tested temperatures. The adsorption behavior of the polymers was found to follow the Langmuir isotherm, and the values ​​of the free energy variation illustrate the mixed types of adsorptions occurring on the N80 surface. Tafel curves indicate that the tested polymers act as mixed anodic and cathodic inhibitors. In contrast, indicates that all tested modifying polymers had antioxidant capability.

Keywords

• Diethanolamine, H3PO4, Monoehtanolamine, N80 steel, Polarization instrument, Triethanolamine, waste tire