Enhanced Corrosion Resistance of Carbon Steel in Hydrochloric Acid Solution by Eriobotrya Japonica Thunb. Leaf Extract: Electrochemical Study

Abstract

The biodegradable inhibitors, which could effectively reduce the rate of corrosion of carbon steel, were investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The mixed-type inhibitors extracted from Eriobotrya japonica Thunb. leaf exhibited excellent inhibition performance, and the inhibition efficiency for carbon steel reached 90.0% at 298 K in hydrochloric acid. Moreover, the adsorption mechanism of the inhibitors on a carbon steel surface is described by the Langmuir adsorption isotherm. Simultaneously, the corrosion morphology of the carbon steel and the inhibitor structure were analyzed by scanning electron microscope (SEM) and Fourier transform infrared spectroscopy (FT-IR), respectively.

Corrosion Inhibition of Mild Steel in Sulfuric Acid by a Newly Synthesized Schiff Base: An Electrochemical, DFT, and Monte Carlo Simulation Study

“…Finding new materials that prevent or mitigate corrosion is one of the grand challenges for corrosion researchers. Organic compounds containing electron-donating centers such as O, N, S, and P and multiple bonds can form a protective layer on a metal surface by adsorption and reduce the corrosion [3,4]. The easiness of preparation and eco-friendliness increased the popularity of the Schiff's bases in the field of corrosion inhibition science [5,6].…”

Corrosion Inhibition Mechanism and Efficiency Differentiation of Dihydroxybenzene Isomers Towards Aluminum Alloy 5754 in Alkaline Media

“…The attention of corrosion scientists is nowadays increasingly focused on application of corrosion inhibitors of natural origin, obtained in accordance with the principles of green chemistry. Green corrosion inhibitors in the form of plant extracts are eco-friendly, non-toxic and biodegradable in neutral environments [27,28,29,30,31,32,33,34,35]. For example, Phyllanthus amarus leaf extract offers nearly 75% efficiency in 2M NaOH solution [36].…”

Investigation the Corrosion Inhibition Effect of Itraconazole on Copper in H2SO4 at Different Temperatures: Combining Experimental and Theoretical Studies

“…We drew on Tan’s work and studied the corrosion inhibition performance of the antifungal drug itraconazole on pure copper in sulfuric acid. As is well known, corrosion inhibitor molecules usually contain heteroatoms such as nitrogen, oxygen, sulfur, etc., and there are solitary electron pairs in these heteroatoms [14,15,16,17,18], which can form coordination bonds with the empty orbitals of the metals of transition to form a dense protective film, thereby the corrosive medium is isolated effectively from the metal surface for protection. Itraconazole contains a large number of heteroatoms and conjugated rings, so it can be used as a potential inhibitor.…”