CORROSION INHIBITION OF STEEL IN MARINE ENVIRONMENT USING AMINO AMIDE DERIVED FROM PET PLASTIC WASTE

Abstract

Inhibition of steel from corrosion process in artificial marine environment of 2.0 M sodium chloride solution using amino amide compound derived from Poly (ethylene terephthalate) plastic waste, PET. In this respect solvent free efficient green recycling of PET waste via aminolysis with 1,3-diaminopropane in the presence of (sodium acetate/acetic acid) catalyst, the product is (N, N'-Bis-(3-amino-propyl)-terephthalamide) compound as nonionic surfactant was separated in good yield, characterized by FT-IR and 1HNMR, and evaluated as green corrosion inhibitor for steel alloys used in manufacturer of petroleum pipe lines using electrochemical techniques and atomic absorption spectroscopy(AAS). Effect of inhibitor concentration and temperature were studied. The corrosion inhibition efficiency found to increases with increasing of the inhibitor concentration and decreased by rising the temperature. Potentiodynamic polarization curves indicate that the used system act as mixed inhibitor. The data of AAS show that the ferric ion Fe+3 concentrations were decreased by increasing inhibitor concentration. The inhibition of amino amide compound derived from waste is due to adsorption and adhesion of its molecules on the steel surface which obeys Langmuir desorption isotherm model.