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Abstract
The inhibitory activity of the expired egg-white carbon steel (CS) extract in HCl solution was studied in this article. The extract was examined using FT-IR, and the surface was examined using a scanning electron microscope (SEM) and energy-dispersive X-ray analysis (EDX). Weight loss techniques at various temperatures were used to examine corrosion investigations (298, 308, 318, and 328 K), concentrations (100, 200, 400, and 800 mg. L−1) of extracts, and electrochemical measurements (potentiodynamic polarization (PDP) and impedance spectroscopy (EIS) at 25°C and different concentrations. Results. Results obtained through EIS demonstrated a maximal inhibition efficiency of 90% at an inhibitor concentration of 800 mg. L−1. Moreover, the findings of the potentiodynamic polarization indicated that egg-white extract was a mixed type of inhibitor and slowed down both cathodic and anodic reactions. For weight loss analysis, an inhibitory potency (89, 83, 77, and 71%) at various temperatures (298, 308, 318, and 328 K) was demonstrated, respectively. It indicates that the temperature rise contributes to a decrease in the resistance of the carbon steel. The adsorption of the expired egg-white extract was spontaneous with physisorption and chemisorption according to the Langmuir isotherm model, according to adsorption isotherm studies.
Highlights
Esseddik Elqars,1 Mohamed Guennoun,1 Aicha Ouarhach,2 Noufissa Sqalli Houssini,1 Mohammed Elhafdi,1 Abdelhafid Essadki,1 Mohamed Ait chaoui,3 and Taibi Nbigui 1
The development of organic extracts has exceeded a certain level; currently, they are the first choice for inhibitors. e inhibitory action of these organic compounds is due to the development of a more or less continuous barrier that inhibits the solution for accessing the metal [8,9,10]. e organic compounds used as inhibitors must have at least one heteroatom working as an active center for their fixation on the metal such as nitrogen, oxygen, sulfur, or phosphorus; one Journal of Chemistry limitation in the application of these products may be the increase in temperature as organic molecules are often unstable at high temperatures [11,12,13]
Many types of research are focussing on corrosion inhibition by organic extracts that give a good efficiency such as corrosion inhibition in Swertia chirata extract in an acid environment (0.5 M H2SO4) [24], evetia peruviana (Kaner) flower extract (TPFE) [25], leaf extract of Arbutus unedo L. [26], Crotalaria pallida leaf extracts [27], which were tested for mild steel, in 1M HCl
Summary
Esseddik Elqars ,1 Mohamed Guennoun ,1 Aicha Ouarhach ,2 Noufissa Sqalli Houssini ,1 Mohammed Elhafdi ,1 Abdelhafid Essadki ,1 Mohamed Ait chaoui ,3 and Taibi Nbigui 1. Expired egg white, which is available all over the world and is less expensive as an organic (animal origin) corrosion inhibitor for carbon steel in a 1M HCl solution, has a 90% effectiveness at 298 K; we examined weight loss (WL) and electrochemical tests such as potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS), and SEM and EDX to assess the inhibitor efficacy.
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