Sustainable and green approach for api 5L pipeline steel acidic corrosion inhibition using agro-industrial waste: Experimental and theoretical.
Popoola, Abimbola Patricia Alao, Alice Osheiza Sanni, Omotayo
Popoola, Abimbola Patricia
Alao, Alice Osheiza
Sanni, Omotayo
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Abstract
Currently, the use of synthetic inhibitors in preventing corrosion is destructive to the
environment; therefore, natural inhibitors might be an alternative and innovative solution to this
challenge, owing to their sustainability. Herein, wasted avocado seed extract was examined as a
sustainable and green inhibitor for API 5L X65 pipeline steel at an ambient temperature using the
gravimetric analysis, the potentiodynamic polarization curve, and linear polarization resistance
techniques. The inhibitor’s chemical characterization was carried out with Fourier-transform infrared
spectroscopy (FTIR), and the morphological characterization was carried out by detailed scanning
electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDX). The result showed
that the extract decreased the corrosion rate by retarding the cathodic and anodic electrochemical
reactions, with a maximum efficiency of 88% at 5 g/L. The extract was adsorbed physically onto the
X 65 steel following the Langmuir adsorption isotherms. The electrochemical studies showed that the
agro-waste was a mixed-type inhibitor. The SEM image of the X65 steel with the extract showed thin
film formation on the steel surface. The extract can be substituted for synthetic inhibitors, which are
toxic, scarce, and costly.
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Date
2023-06-21
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MDPI
Research Projects
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Keywords
Avocado seed extract, Acid corrosion, Pipeline steel, Sustainable inhibitor, Corrosion inhibition