Corrosion mitigation of mild steel in hydrochloric acid solution using grape seed extract

Fatemeh Marhamati,Mohammad Mahdavian,Saeed Bazgir

doi:10.1038/s41598-021-97944-7

Abstract

Plant extracts have gained a lot of attention due to their ecofriendly nature for corrosion inhibition. In this study, we examined the inhibition performance of grape seed extract as an eco-environmental inhibitor for mild steel in hydrochloric acid medium. Electrochemical impedance spectroscopy, potentiodynamic polarization, and electrochemical noise techniques were employed to study mild steel's electrochemical behavior in the hydrochloric acid solutions containing grape seed extract. Results depicted that grape seed extract could successfully inhibit the corrosion of mild steel. Besides, water droplet contact angle, field-emission scanning electron microscopy coupled with energy dispersive spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy were utilized to study the surface of mild steel specimens after dipping in acidic solutions. Electrochemical impedance results showed a corrosion efficiency of about 88% in 300 ppm of grape seed extract. Also, results revealed more compact corrosion products with improved integrity in the presence of grape seed, which confirmed electrochemical test results.

Highlights

Plant extracts have gained a lot of attention due to their ecofriendly nature for corrosion inhibition
grape seed extract (GSE) was employed as an effective corrosion inhibitor for mild steel in acidic solution
The extract has heteroatoms that can interact with the iron cations on the mild steel surface

Summary

Introduction

Plant extracts have gained a lot of attention due to their ecofriendly nature for corrosion inhibition. We examined the inhibition performance of grape seed extract as an eco-environmental inhibitor for mild steel in hydrochloric acid medium. Electrochemical impedance spectroscopy, potentiodynamic polarization, and electrochemical noise techniques were employed to study mild steel’s electrochemical behavior in the hydrochloric acid solutions containing grape seed extract. Results depicted that grape seed extract could successfully inhibit the corrosion of mild steel. Electrochemical impedance results showed a corrosion efficiency of about 88% in 300 ppm of grape seed extract. Green inhibitors have been extracted from the various sections of plants, such as flowers, leaves, stems, roots, shells, seeds, and fruits. They can form a protective film on the metal surface, causing an increase in inhibition efficiency (IE %). Grape seed extract (GSE) containing a significant amount of flavonoids such as catechin, epicatechin, and some phenolic acids

Findings

Discussion

Conclusion