Evaluation of Aloe Vera Gel Extract as Eco-friendly Corrosion Inhibitor for Carbon Steel in 1.0 M HCl

Sobhy, Mohamed Ayman; Mahross, Mahmoud H.; Abbas, Mohamed A.; El-Zomrawy, Adham A.

doi:10.21608/ejchem.2021.87551.4225

Cited by 3 publications

(2 citation statements)

References 24 publications

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“…The value of reveals more about the mechanism of corrosion inhibition. When ( < 0), the adsorption process is followed by the release of heat (an exothermic process), which can be chemi-sorption, physic-sorption, or both, whereas the endothermic process is associated with chemi-sorption 63 . The values of may also be used to forecast whether the exothermic process is chemi-sorption or physic-sorption.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Gad,

Abbas,

Bedair

et al. 2023

Sci Rep

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The studied Schiff-base compounds in this work are multitasked investigated as corrosion inhibitors and also, to improve the physical and mechanical properties of reinforced concrete. The efficiency inhibition of the two novel Schiff-base compounds named (DHSiMF) and (DHSiB) for corrosion of carbon-steel in aqueous media of 1 M HCl was assessed via electrochemical methods and loss in weight. FT-IR, 1H-NMR spectra and elemental analysis were used to confirm the structure of such compounds. It was found to have successful inhibition even at low concentrations in tested media, as an increase in inhibitor concentration led to an improvement in the inhibition efficiency. The weight loss results clearly demonstrate that DHSiMF of C-steel in 1 M HCl has a higher inhibition efficiency than DHSiB, with a maximum inhibition efficiency (85%) attained at 1 × 10–2 M from DHSiMF. Electrochemical experiments likewise revealed the same order, but with a maximal inhibitory efficiency of 98.1%. The addition of inhibitors to the corrosive media dramatically changed the anodic Tafel constants (βa) and cathodic Tafel constants (βc), indicating a mixed type nature. Electrochemical polarization curves illustrated the functions of mixed-type inhibition and the action of adsorption matching with the Langmuir adsorption isotherm. The ∆Gads values for DHSiMF and DHSiB at temperatures (ranging from 303 to 333 K) are − 34.42 kilojoule/mole to − 37.51 kilojoule/mole. These values indicate that the compounds’ adsorption types are chemo-physical adsorption. X-ray diffraction (XRD) and Scanning electron microscopy (SEM) experiments were used to check the existence of the protection layer on the surface of carbon steel by analyzing the morphologies of the corrosion effects and the formed chemical compositions of the corrosion outcomes. For the concrete, the findings suggest that the chemical reaction that takes place between the DHSiMF and DHSiB and the concrete mix will result in an increase in the flexural strength, the compressive strength, and the indirect tensile strength of the concrete that is made of the gravel and dolomite aggregate.

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Section: Resultsmentioning

confidence: 99%

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Gad,

Abbas,

Bedair

et al. 2023

Sci Rep

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show abstract

“…However, the E corr shift tends towards the anodic area along with the addition of A. vera extract, so it did not characterize the inhibitor's behavior as pure cathodic type and indicated a mixed type of environmentally corrosion inhibitor. Therefore, it can be said that A. vera extract functions as a corrosion inhibitor, which shows mixed corrosion inhibition for API 5L steel in various media, as evidenced by studies 37,38,41,45 .…”

Section: Pdp Analysismentioning

confidence: 94%

Unveiling green corrosion inhibitor of Aloe vera extracts for API 5L steel in seawater environment

Royani,

Hanafi,

Mubarak

et al. 2024

Sci Rep

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This study evaluated Aloe vera extract as a green inhibitor to prevent corrosion in seawater environments. A. vera extract was produced by maceration with methanol–water at room temperature. Electrochemical techniques were used to evaluate the corrosion inhibitor effectiveness of the A. vera extract. The morphology of the corrosion products was analyzed by FE-SEM equipped with EDS and AFM. FT-IR and LCMS characterized the functional and structural groups in this extract. The electrochemical measurements show that A. vera extract could effectively reduce the corrosion of API 5L steel in seawater environments. Inhibition efficiency (IE) increases with increasing concentration. Optimal corrosion inhibition efficiency of around 83.75% (PDP) and 88.60% (EIS) was obtained by adding 300 mg L−1 of extract at 310 K. Furthermore, the higher the concentration of A. vera extract, the greater the activation energy (Ea), with the highest activation energy being 48.24 kJ mol−1 for the concentration of 300 mg L−1. Conversely, increasing the temperature and exposure duration reduces the corrosion inhibition efficiency (IE) values; the best exposure period was 30 min with 88.34% IE by a concentration of 300 mg L−1 at 300 K. This corrosion inhibition is achieved by the adsorption process of A. vera bioactive on metal surfaces with a mixed inhibitor through a physisorption-chemisorption mechanism. This finding was confirmed by the smoother surface morphology of the steel treated with A. vera extract than without. This unveiling investigation found that A. vera extract has the potential to be an environmentally friendly corrosion inhibitor in the seawater environment.

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Corrosion inhibition of copper alloy of archaeological artifacts in chloride salt solution using Aloe vera green inhibitor

Mahmoud,

Abdel-karim,

Saleh

et al. 2025

Journal of Alloys and Compounds

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Evaluation of Aloe Vera Gel Extract as Eco-friendly Corrosion Inhibitor for Carbon Steel in 1.0 M HCl

Cited by 3 publications

References 24 publications

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Synthesis and applications of novel Schiff base derivatives as corrosion inhibitors and additives for improvement of reinforced concrete

Unveiling green corrosion inhibitor of Aloe vera extracts for API 5L steel in seawater environment

Corrosion inhibition of copper alloy of archaeological artifacts in chloride salt solution using Aloe vera green inhibitor

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