Ketosulfone Drug as a Green Corrosion Inhibitor for Mild Steel in Acidic Medium

Abstract

Ketosulfone has been evaluated as a green corrosion inhibitor for mild steel in 1 M HCl medium by chemical and electrochemical methods. The effect of Ketosulfone on the corrosion rate was determined at various concentrations and temperature. Polarization measurements reveal that Ketosulfone acts as a mixed-type inhibitor. The adsorption of the inhibitor on the mild steel surface in acid solution was found to obey the Langmuir adsorption isotherm. The activation and thermodynamic parameters of dissolution and adsorption were calculated and discussed. Quantum chemical calculations were calculated and discussed, and it supports the results. SEM images of inhibited strips reveal the likely formation of a protective film.

Aryl sulfonamidomethylphosphonates as new class of green corrosion inhibitors for mild steel in 1M HCl: Electrochemical, surface and quantum chemical investigation

“…The quantum chemical study based on DFT-theory plays a very important role in understanding the fundamental aspects of the molecular structure and its inhibition efficiency [26]. All the quantum chemical calculations were carried out using the functional hydride B3LYP density function theory (DFT) formalism having electron basis set 6-31 G (d, p) for all atoms [27].…”

Anticorrosion potential of a pharmaceutical intermediate Floctafenine for zinc in 0.1 M HCl solution

“…9 consequently decreased the metal corrosion rate. These observations show that inhibitor compound acted as protective layer and decreases the corrosion rate through increasing the activation energy of metal dissolution by making a barrier to charge and mass transfer by their adsorption on metal surface [47,48]. Positive value of DH * shows the zinc dissolution process is endothermic in nature.…”

Self-Assembly and Anticorrosive Property of N-Alkyl-4-[2-(methoxycarbonyl)vinyl]pyridinium Bromides on X70 Steel in an Acid Medium: an Experimental and Theoretical Probe

“…As illustrated in Figures 11 and S22 in the SI, plotting C/θ versus C yields a straight line with a correlation coefficient (R 2 ) higher than 0.9947 and a slope close to 1. This indicates that the adsorption of PPA-n can be fitted to a Langmuir isotherm: 38 (9) where C is the concentration, θ is the surface coverage by inhibitor molecules, and K ads is the adsorption equilibrium constant.…”

“…5−7 The action mechanism of the corrosion inhibitor is adsorption on the metal surface, mainly physisorption or chemisorption or both. 8,9 A multitude of endeavors have been paid to the design and synthesis of organic inhibitors. It has been widely accepted that heteroatoms (usually N, O, and S) and unsaturated bonds (CC, CO, etc.)…”