Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Al-Turkustani, Aisha M.

doi:10.5155/eurjchem.4.3.303-310.805

Cited by 4 publications

(2 citation statements)

References 31 publications

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“…Intense electronic bonds are formed by a chemical interaction between the metallic substrate and the inhibitor molecules during the chemisorption process. On the contrary, electrostatic couplings are prominently generated by the van der Waals force [24][25][26][27][28][29][30]. The type and amount of metallic charge, the electrolytes, the electronic configuration of the inhibitory molecules, the temperature of the media, the subjection period, the type of substituents, etc.…”

Section: Introductionmentioning

confidence: 99%

Computational insights into the corrosion inhibition potential of some pyridine derivatives: A DFT approach

Thakur

Kumar²

2023

Eur J Chem

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In the present investigation, the corrosion inhibition potency of five pyridine derivatives was computationally simulated and investigated by utilizing the Density Functional Theory (DFT) technique using a basis set of B3LYP/6-31++G (d,p). The predicted corrosion inhibition capacity was shown to improve in the order of 6-(trifluoromethyl) nicotinic acid > 4-(trifluoromethyl) nicotinic acid > N-methyl-4-chloropyridine-2-carboxamide > 2-chloro-6-trifluoromethylnicotinic acid > methyl 2-aminopyridine-4-carboxylate. Anticorrosion potentials were predicted using quantum chemical variables such as energy gap (∆E) i.e. HOMO-LUMO, ionization potential (I), electron affinity (A), proportion of electrons transmitted (∆N), hardness (η), softness (σ) and electronegativity (χ) of chemical species. It was often observed that the corrosion inhibiting rate improved with enhancement of EHOMO, σ, and reduced ELUMO, ∆E and η. Additionally, the electrostatic potential (ESP) mapping revealed that the heteroatoms, including the oxygen and nitrogen atoms, were the regions of anticipated electrophilic attack. This meant that atoms of oxygen and nitrogen could form bonds between the metallic substrate atoms and the investigated inhibitors. With the findings obtained, 4-methyl-2-aminopyridine-4-carboxylate showed the highest EHOMO (-0.23167 eV), softness (12.40694 eV-1) and the lowest ELUMO (-0.7047 eV), energy gap (0.1612 eV) and hardness (0.15107 eV), therefore revealed the excellent corrosion inhibiting attribution for several crucial metals and alloys, including aluminum, mild steel, stainless steel, zinc, brass, copper, etc.

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Section: Introductionmentioning

confidence: 99%

Computational insights into the corrosion inhibition potential of some pyridine derivatives: A DFT approach

Thakur

Kumar²

2023

Eur J Chem

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“…Cuspidata Wood Tar Oil as Anticorrosion for Mild steel in Acidic Media nature but also, it is viewed as a rich source of naturally occurring chemical organic compounds could be used in many applications and also could be extracted by methods with low cost and simple manner. Leaves, seeds and peels extract of many plants were studied extensively and many of them proved to possess corrosion inhibition activity [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Olea europaea Subsp. Cuspidata Wood Tar Oil as Anticorrosion for Mild steel in Acidic Media

Turkustani¹,

Gumgumji²,

Hajar³

2019

Asian J. Chem.

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Corrosion is one of the serious problems in industry, specially acidic corrosion which is caused by acidic solutions which are widely used in acid cleaning, acid pickling and acid descaling. Mild steel (MS) is widely used in the the industrial field is vulnerable to be corroded by the acidic solution. In the industrial media, corrosion processes are responsible for the loss of metals. There are various methods to mitigation the degradation or destruction of metal surface. Using inhibitors is one of the most potent methods in control of corrosion is due to its low cost and eases of application and practice. As the concern is focused on the safety of any industrial process in health and environment, the use of organic plants as corrosion inhibitors is in the forefront in the current trend of corrosion inhibition studies. In the last decades the need of novel corrosion inhibitor compounds has become more and more stringent. In this study, the efficiency of the bark of Olea europaea subsp. Cuspidata as corrosion inhibitor for mild steel in 1.0 M sulphuric acid was studied by electrochemical measurements [potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS)]. The results showed that Olea europaea subsp. Cuspidate wood tar oil acts as a potent corrosion inhibitor and the performance of the inhibitor varied with concentrations for mild steel in 1.0 M H2SO4 + 10 % EtOH. The maximum inhibition (%) was 94.97 %, the results were supported by different techniques used. Electrochemical analysis indicated that Olea europaea subsp. Cuspidata wood oil tar extract acts as mixed mainly cathodic inhibitor. Also, surface analysis the scanning electron microscope (SEM) was carried out to determine the corrosion inhibition property of Olea europaea subsp. Cuspidata wood tar oil in (1.0 M H2SO4 + 10 % EtOH) solution. The adsorption of the wood tar extract on mild steel surface followed Langmuir isotherm.

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Impact of selected ionic liquids on corrosion protection of mild steel in acidic medium: Experimental and computational studies

Nkuna

Akpan

Obot

et al. 2020

Journal of Molecular Liquids

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Thermodynamic, chemical and electrochemical investigation of pandanus tectorius extract as corrosion inhibitor for steel in sulfuric acid solutions

Cited by 4 publications

References 31 publications

Computational insights into the corrosion inhibition potential of some pyridine derivatives: A DFT approach

Computational insights into the corrosion inhibition potential of some pyridine derivatives: A DFT approach

Olea europaea Subsp. Cuspidata Wood Tar Oil as Anticorrosion for Mild steel in Acidic Media

Impact of selected ionic liquids on corrosion protection of mild steel in acidic medium: Experimental and computational studies

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