Experimental and theoretical evidence for effective corrosion mitigation in mild steel using novel Garcinia gummi-gutta leaf extract

Abstract

Purpose Surface pretreatment of iron and its alloys to remove stains and inorganic contaminants on the metal surface undergoes dissolution by virtue of the strong acidic media thereby increasing its susceptibility to corrosion. The purpose of this study is to explore the corrosion mitigation prospects of green corrosion inhibitors on mild steel surface. Design/methodology/approach Corrosion inhibition performance of Garcinia gummi-gutta leaf extract (GGLE) was explored against mild steel in 1 M HCl solution using the weight-loss method, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. Surface characterization was carried out to study the mechanism of inhibitor action. Findings The concentration of GGLE varied from 100 to 6,000 ppm and the result indicates that corrosion inhibition efficiency was amplified by raising the inhibitor concentration. The maximum inhibition efficiency was 82.2% at 6,000 ppm concentration. EIS results show the development of a protective layer of inhibitor molecule over the metal surface and PDP demonstrates that the inhibitor operates as a mixed-type inhibitor. Scanning electron microscopy and atomic force microscopy were executed to assess the surface morphology and roughness, respectively. Originality/value To the best of the authors’ knowledge, so far, no studies have been reported on the corrosion inhibition performance of GGLE which is rich in many bioactive components especially hydroxyl citric acid. This work encompasses the corrosion inhibition capability of GGLE against mild steel in an acidic medium.

An improved protection of alanine for atmospheric corrosion of mild steel using carbon dots-montmorillonite hybrid materials

“…The values of the fitted parameters are summarized in Table 1. The inhibition efficiency (η%) of DMT-ALA and OMT-ALA could be established by the polarization resistance in the pre-filmed electrode (R p = R f + R ct ) and the bare electrode (R 0 P = R ct ) (GK et al , 2022; Mingyang et al , 2023): where R p denotes the polarization resistance in the presence of the anti-corrosion material, and R 0 p denotes the polarization resistance in the absence of the anti-corrosion material.…”

“…The values of the fitted parameters are summarized in Table 1. The inhibition efficiency (h%) of DMT-ALA and OMT-ALA could be established by the polarization resistance in the pre-filmed electrode (R p ¼ R f 1 R ct ) and the bare electrode (R 0 P ¼ R ct ) (GK et al, 2022;Mingyang et al, 2023):…”

Assessment of the mild steel corrosion inhibition competence of Garcinia gummi-gutta leaf extract: Evaluation by XPS, thermodynamic, and kinetic parameters

“…Mild steel (MS) coupons with exact dimensions were dipped in 1 M HCl in both the presence and absence of GGLE at 30°C for 5 hours to measure weight loss. The authors' reports on their analysis of the chemical composition of GGLE using GC-MS and FTIR (6). For the purpose of evaluating the effectiveness of the inhibition, GGLE concentrations were varied from 100 to 6000 ppm (7).…”

“…The composition of leaf extract and mechanism of inhibition varies from plant to plant. As a result, authors tested a novel leaf extract based on Garcinia gummi-gutta for its ability to prevent mild steel corrosion, and the results were published (6). The temperature impact on the effectiveness of GGLE's corrosion inhibition and adsorption mechanism was not included in that study.…”

Experimental and computational study of imidazole-pyridine and its derivatives as corrosion inhibitors on brass in sulfuric acid solution

“…However, these metals are prone to corrosion in the process of storage or daily operations (Wang et al , 2022), thus affecting their normal use. To minimize loss due to corrosion, researchers have adopted various methods to protect metals (Xia et al , 2020), such as developing new corrosion-resisting alloys (Seo et al , 2023), surface treatment (Ermakova et al , 2023), application coating (Karattu et al , 2023; Pan et al , 2020; Pan et al , 2020) and adding corrosion inhibitors (Li et al , 2022; Gan et al , 2022; Xiong et al , 2022; Luis et al , 2022; Nasser and Masmali, 2022; GK et al , 2022; Wang et al , 2023). Among these, the method of adding corrosion inhibitors has been widely used owing to the advantages of low dosage, simple operation, low cost, significant effect and general effectiveness (Yujie et al , 2019).…”