Electrochemical Inhibitory Effects of Non-edible Vegetable Oils on Low-Alloyed Low Carbon Steel in H2SO4

Adesusi, Olanrewaju Moses; Adetunji, Olayide R.; Ismaila, Salami Olasunkanmi; Dare, Enock O.; Erinle, Tunji John; Akinpelu, Olumide Olufunso

doi:10.1007/s11668-020-00808-x

Cited by 3 publications

(4 citation statements)

References 20 publications

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“…Tafel fits made on PDP plots generated the corrosion current densities from which corrosion rates (CR) and inhibition efficiencies (IE PDP ) were obtained based on equations (3) and (4), respectively (Loto, 2017a). The EIS produced Nyquist and Bode plots fitted to most suitable of the equivalent circuits (EC), Figure 1(a) and 1(b) for uninhibited and inhibited solution respectively (Adesusi et al , 2020) where the composition of Figure 1(b) accounted for protective oxide layer developed with the addition of inhibitors. Double layer capacitance and inhibition efficiencies from EIS have been evaluated in accordance with equations (5) (Chaouiki et al , 2019) and (6) (Abbasov et al , 2014), respectively: …”

Section: Materials and Methodologymentioning

confidence: 99%

“…The electrochemical experimental parameters measures through open circuit potentials (OCP), potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) on LAMCS were conducted according to work previously reported by Adesusi et al (2020). Before PDP and EIS commenced, steady state OCP in the range 63 mV fluctuation was observed for each experimental setup.…”

Section: Electrochemical Experimental Testsmentioning

confidence: 99%

“…Mokhtari et al (2014) examined oil from Jatropha curcas , and it was established as a mixed corrosion inhibitor on carbon steel in 1 M HCl with activation controlled hydrogen evolution process. Vegetable oils are made up of bioactive substances (Adesusi et al , 2020); enhancement of electrochemical reactivity by any type of plant oil is consequent upon its carbonyl, O 2 , N and or S groups constituents (Abbasov et al , 2014) having molecular structure composed of multiple bonds (Ugi and Magu, 2017) which impart corrosion inhibition via performance as adsorption center. These oils when in there unmodified forms contain free fatty acid (FFA) and literature reviews showed that studies are very scarce on corrosion inhibition of low alloyed medium-carbon steels (LAMCS) by unmodified seed oils of rubber (SOR), neem (SON) and jatropha (SOJ) in H 2 SO 4 .…”

Section: Introductionmentioning

confidence: 99%

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Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Adesusi

Adetunji

Erinle

et al. 2021

WJE

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Purpose The purpose of this paper is to investigate the mechanisms of low alloyed medium-carbon steel (LAMCS) corrosion in 0.5 M H2SO4 inhibited by seeds oils of rubber (SOR), Neem (SON) and Jatropha (SOJ) containing varying degree of free fatty acid (FFA). Design/methodology/approach Specific gravity, acid values and FFA compositions of oils were determined. Potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and X-ray diffraction (XRD) are techniques used to investigate the corrosion inhibition mechanisms with evaluated Gibbs free energy of adsorption. Findings Corrosion inhibition efficiencies of oils reached values >99% as obtained from PDP and EIS. Protective oxide layer was formed on LAMCS consequent on containment of carbonyl and hydroxyl groups in the FFA of SOR, SON and SOJ, respectively. The SOR and SOJ are found to be mixed inhibitors, whereas SON behaved as anodic inhibitor. Mechanism of adsorption of SOR was synergistic between physisorption and chemisorption, while SON and SOJ exhibited physisorption. SEM micrographs images showed that uninhibited sample exhibited thicker mass of corrosion products. Formation of protective oxide layer was confirmed by XRD diffractograms. Practical implications This study has shown that the need for modification of vegetable seed oils containing FFA is unnecessary as the hydroxyl and carbonyl groups of the FFA contained in the respective oil were found to be the center of adsorption of the oils on the steel surface. Hence, cost and by-products associated with modification of oils used as corrosion inhibitors are eliminated. Originality/value SOR, which has the highest percentage FFA, was found to be the most influential on the corrosion inhibition mechanism of LAMCS, specifically within 0.01–0.02 g/mL concentration. FFA contained in the respective seed oil aided formation of protective oxide layer at interface between H2SO4 and LAMCS, relative to amount composed.

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Section: Materials and Methodologymentioning

confidence: 99%

Section: Electrochemical Experimental Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Adesusi

Adetunji

Erinle

et al. 2021

WJE

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show abstract

“…A conference paper entitled Corrosion Inhibition of Carbon Steel by Non-Edible Vegetable Oils used as Cutting Fluids in Minimum Quantity Lubrication (MQL) [168], investigated the corrosion inhibition performance of neem seed oil (NSO) and jatropha seed oil (JSO) on carbon steel in a 0.5 M H 2 SO 4 environment, which is common in oil refineries and sulfur plants. The study employed open-circuit potential (OCP) measurement, potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS) techniques to investigate the corrosion performance of NSO and JSO.…”

Section: Corrosion Resistancementioning

confidence: 99%

Conventional and Recent Advances of Vegetable Oils as Metalworking Fluids (MWFs): A Review

et al. 2023

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Vegetable oils have been used as metalworking fluids (MWFs) for many years, particularly in small-scale metalworking operations and in industries where environmental regulations are strict. Before the development of modern MWFs, vegetable oils were one of the most common lubricants used for metalworking tools. The use of vegetable oils can be traced back to ancient civilizations such as Egypt, Greece, and Rome, where olive oil was commonly used to lubricate metal tools and weapons. Today, vegetable oils are used as MWFs in a variety of applications. They are often combined with additives or nanoparticles to enhance their performance, such as improving the lubricity, cooling properties, and stability of the oil, as well as reducing friction and wear on the cutting tool. Additives, such as antioxidants, anti-wear agents, and extreme pressure (EP) additives, can be used to improve the performance of vegetable oils as cutting fluids. Compared to standard MWFs, vegetable oils are generally more biodegradable and environmentally friendly, and can be more cost-effective. However, MWFs may offer superior performance in certain areas, such as lubrication and cooling. Ultimately, the choice of MWFs will depend on the specific requirements of the metalworking operation and the balance between performance, cost, and environmental considerations. As the demand for sustainability and environmental responsibility continues, the use of vegetable oils as MWFs is likely to become even more popular in the future. Overall, vegetable oils offer a viable and potentially attractive alternative to standard MWFs in certain applications. This review highlights both conventional and most recent advances in vegetal oils frequently used as lubricant fluids in manufacturing processes.

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Investigating the effects of vegetable oil-based cutting fluids with minimum quantity lubrication on machining performance of low-alloyed carbon steels: an optimization study

Adesusi,

Adetunji,

Musa

et al. 2024

Int J Interact Des Manuf

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Electrochemical Inhibitory Effects of Non-edible Vegetable Oils on Low-Alloyed Low Carbon Steel in H2SO4

Cited by 3 publications

References 20 publications

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Conventional and Recent Advances of Vegetable Oils as Metalworking Fluids (MWFs): A Review

Investigating the effects of vegetable oil-based cutting fluids with minimum quantity lubrication on machining performance of low-alloyed carbon steels: an optimization study

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Electrochemical Inhibitory Effects of Non-edible Vegetable Oils on Low-Alloyed Low Carbon Steel in H2SO4

Cited by 3 publications

References 20 publications

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H2SO4

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H2SO4

Conventional and Recent Advances of Vegetable Oils as Metalworking Fluids (MWFs): A Review

Investigating the effects of vegetable oil-based cutting fluids with minimum quantity lubrication on machining performance of low-alloyed carbon steels: an optimization study

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Product

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Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄

Free fatty acid influenced corrosion inhibition mechanisms of some inedible plants seeds oils on low alloyed medium-carbon steel in H₂SO₄