alexa Abstract | Aminolysis of polyethylene terephthalate waste as corrosion inhibitor for carbon steel in HCl corrosive medium

Advances in Applied Science Research
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Research Article Open Access

Abstract

Soft drink bottles was subjected to depolymerization through aminolysis using mono ethanol amine (MEA) in the presence of sodium acetate as a catalyst the product of pol(bis(2- hydroxyethylene)terephthalamide (PHETA) was evaluated as corrosion inhibitors for C-Steel in 1 M HCl by using weight loss, open circuit potential and potentiodynamic polarization measurements, the polarization curves indicate that these compound act as mixed type inhibitors. The inhibition efficiency increase with increasing the concentration of the inhibitors and decreases with increasing the temperature , the values of activation energy(Ea) and free energy of adsorption (ΔGads) indicated that the type of adsorption was chemical adsorption. The inhibition occurs through adsorption of the inhibitor molecules on the metal surface without modifying the mechanism of corrosion process. The adsorption of the inhibitor on C-Steel surface was found to follow the Langmuir adsorption isotherm. Scanning electron microscope (SEM) was used to study the surface morphology of steel surface in absence and presence of 200 ppm of the used inhibitor.

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Author(s): R S Abd ElHameed

Keywords

Recycled Plastic Waste, Hydrochloric acid, Corrosion Inhibitors, Carbon Steel and Adsorption isotherm., Corrosion Inhibitors

 
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