Corrosion Inhibition of Mild Steel in Hydrochloric Acid Environments ContainingSonneratia caseolarisLeaf Extract

Abstract

Sonneratia caseolaris leaf extract was characterized for its mitigation of the electrochemical corrosion of steel in naturally aerated hydrochloric acid environments by electrochemical methods and surface analysis. The presence of S. caseolaris leaf extract (SCLE) in the hydrochloric acid medium ameliorated the corrosion resistance of steel via the adsorption of SCLE species to form a barrier layer. The improved inhibition effectiveness was demonstrated to be independent of the SCLE concentration and the corrosive environment. The highest inhibition performance of approximately 98% was reached for steel in a 1 M HCl medium containing 2500 ppm SCLE. The performance significantly decreased with a decrease in the HCl concentration from 1.00 to 0.01 M with the same SCLE concentration. In addition, severe corrosion occurred on the uninhibited steel surface but was significantly reduced on the inhibited steel surface. The analyzed results also indicated the existence of electronegative functional groups in SCLE, which could promote the adsorption process for the self-formation of the barrier layer on the steel surface. The work reported herein suggested a powerful strategy to mitigate electrochemical corrosion by adding an effective new inhibitor to achieve a green inhibitor system.

N‐(4‐Chloromethylbenzyl)‐N, N‐dimethyldodecan‐1‐aminium Chloride: A Quaternary Ammonium Surfactant as Corrosion Inhibitor

“…[44,45] The two-time constant Bode plot phenomena are typically seen in anticorrosive coatings, where the second time constant is obtained from the disintegration of the coating structures or the emergence of pores and cracks. [46] The formation and expansion of the second-time constant in the Bode plots of our current work may be due to the penetration of corrosive species like water and chloride ions through the adsorbed inhibitor layers. Evidently, the protective coating may be more intrinsic and compact at larger concentrations, and the production of second-time constants is more pronounced.…”

“…The single maxima in the Bode plots are caused by a single charge transfer process that takes place at the metal‐electrolyte contact [44,45] . The two‐time constant Bode plot phenomena are typically seen in anticorrosive coatings, where the second time constant is obtained from the disintegration of the coating structures or the emergence of pores and cracks [46] . The formation and expansion of the second‐time constant in the Bode plots of our current work may be due to the penetration of corrosive species like water and chloride ions through the adsorbed inhibitor layers.…”

An environmentally sustainable approach for the utilization of Erigeron bonariensis as a green inhibitor against weathering steel corrosion in acidic media

“…This damage occurred due to the immersion of low carbon steel in the corrosive medium, leading to surface corrosion. 37 In contrast, for the inhibited steel coupon, the surface displays notable improvement owing to the adsorption of the inhibitor. Fig.…”

“…The surface of the non-corroded weathering steel appears to be in pristine condition, whereas we observed signicant damage on the surface of the corroded weathering steel. This damage occurred due to the immersion of low carbon steel in the corrosive medium, leading to surface corrosion 37. In contrast, for the inhibited steel coupon, the surface displays notable improvement owing to the adsorption of the inhibitor.…”

Evaluation of Brachystegia Eurycoma Leaves Extract as a Source of Green Inhibitor for Mild Steel in Acid Solution

“…The electron/atoms calculations of inhibitor molecules were conducted by the density functional theory (DFT)/B3LYP method [12]. Analysis of information about molecular geometric and electron distributions as well as inhibitor efficiencies and inhibitor−surface interactions due to its accuracy and less time requirement from the computational point of view was validated with DFT [27][28].…”