Nicotinic acid as green inhibitor for copper corrosion in 3.5 wt % NaCl solution: experimental and quantum chemical calculations

Coulibaly, Nagnonta Hippolyte; Brou, Yapi Serge; Diomande, Gbé Didier; Creus, Juan; Trokourey, Albert

doi:10.4314/ijbcs.v12i2.30

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…Under the presence of chitosan in NaCl solution E OC shifts to more negative values and the magnitude of such shifts increases with increasing chitosan concentration. These results suggest that chitosan would exert a predominant cathodic effect in inhibiting copper corrosion in corrosive media [24]. The rise in corrosion potential after the initial decrease is indicative of the interruption of corrosion process by the formation and thickening corrosion products and chitosan film at the copper surface [25].…”

Section: Open Circuit Potentialmentioning

confidence: 99%

Chitosan biopolymer effect on copper corrosion in 3.5 wt.% NaCl solution: Electrochemical and quantum chemical studies

2020

Int. J. Corros. Scale Inhib.

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The inhibition of copper corrosion by chitosan biopolymer in 3.5 wt.% NaCl solution was assessed using electrochemical impedance spectroscopy, potentiodynamic polarization and quantum chemical methods. Results obtained show that Chitosan inhibited copper dissolution in the corrosive medium. The adsorption of the studied inhibitor on the metallic surface was found to follow Langmuir adsorption model. The inhibition efficiency increased with the inhibitor concentration. From polarization measurements, Chitosan can be classified as mixedtype corrosion inhibitor. The Gibbs free energy of adsorption value revealed that the adsorption process of chitosan is endothermic and mainly by a physisorption mechanism following Langmuir adsorption isotherm model. Surface analysis performed using optic microscopy has confirmed the existence of a protective film of chitosan molecules onto copper surface. Moreover, quantum chemical calculations at B3LYP level with 6-31G (d, p) basis set lead to molecular descriptors such as E HOMO (energy of the highest occupied molecular orbital), E LUMO (energy of the lowest unoccupied molecular orbital), ΔE (energy gap) and μ (dipole moment). The global reactivity descriptors such as χ (electronegativity),  (global hardness), S (global softness) and ω (electrophilicity index) were derived using Koopman's theorem and analyzed. The local reactivity parameters, including Fukui functions and dual descriptor were determined and discussed. Experimental and theoretical data were in good agreement.

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Section: Open Circuit Potentialmentioning

confidence: 99%

Chitosan biopolymer effect on copper corrosion in 3.5 wt.% NaCl solution: Electrochemical and quantum chemical studies

2020

Int. J. Corros. Scale Inhib.

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“…Electrochemistry is a multidisciplinary science. It is applied in various sectors such as energy production and / or storage, electrosynthesis, the corrosion phenomena study, analysis, wastewater treatment, chlorine and oxygen production (Liu et al, 2014;Datché et al, 2014;Kambire et al, 2015a;Maman et al2017;Coulibaly et al, 2018). Today, this science has received great attention for the wastewater treatment (Olvera-Vargas et al, 2015;Huguenot et al, 2015;Pohan et al, 2013), due to the ineffectiveness of biological treatments in presence of refractory or recalcitrant molecules (Oller et al, 2011;Sawadogo et al, 2012 ;Ouedraogo et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Study of lifetime of Platinum Modified Metal Oxides Electrodes

Pohan¹,

Ollo²,

Zakaria³

et al. 2020

Int. J. Bio. Chem. Sci

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Pt, IrO2, RuO2, Pt-IrO2 and Pt-RuO2 electrodes have been shown to be effective in their application in various fields. However, it is necessary to study their long-term stability. So, our objective is to prepare them and study their lifetime using intensiostatic measurement. Then they were prepared at 400 °C on titanium plates used as a substrate. Physical measurements (scanning electron microscopy) of these anodes revealed that their surface are rough and porous structures. Lifetime study was carried out in H2SO4 9 N and under a current density of 410 mA /cm2. The long-term stability of Pt improved when coupled to IrO2 in contrast to RuO2. From this study, the performance of the electrode was found to increase in the order: RuO2 < Pt-RuO2 < Pt < Pt-IrO2 < IrO2. For RuO2 and IrO2 pure electrodes, the deactivation would be due to the dissolution of precursors deposited on the titanium. For the Pt pure electrode, deactivation would be due to the detachment of platinum coating. The deactivation of the Pt-IrO2 and Pt-RuO2 electrode would be due, on the one hand to the platinum detachment from IrO2 or RuO2 and on the other hand to the metal oxides (IrO2 or RuO2) dissolution.Keywords: Electrodes, platinum, metal oxides, lifetime.

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“…Thus, researchers have carried out many works that have focused on several drugs including vitamins. The main objective of this work is the study of the synergistic effect of the two forms of vitamin B3 that are: nicotinicacid (C 6 H 5 NO 2 ) and nicotinicamide (C 6 H 6 N 2 O) (Scheme 1) on the corrosion of copper in 3.5% NaCl medium [10] [11] simulating sea water as well as in one molar nitric acid medium.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Study of the Synergistic Effect of Two Copper Corrosion Inhibitors, Nicotinic Acid (NAC) and Nicotinamide (NAM) in Two Different Media

Brou¹,

Coulibaly²,

Diki³

et al. 2019

OJPC

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Inhibitive properties of NAC and NAM as well as their mixture have been investigated in two different corrosive media through potentiodynamic polarization and electrochemical impedance spectroscopy at 298 K. These electrochemical measurements indicate that the inhibition efficiency increases with the concentration for each of the inhibitors used separately as well as for their mixture. In both cases, the combination behaves as mixed type inhibitor with a great cathodic tendency. NaCl 3.5% highlights an antagonist effect of NAM which reduces the effectiveness of NAC whereas HNO 3 1M shows a synergistic effect between them.

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Nicotinic acid as green inhibitor for copper corrosion in 3.5 wt % NaCl solution: experimental and quantum chemical calculations

Cited by 13 publications

References 26 publications

Chitosan biopolymer effect on copper corrosion in 3.5 wt.% NaCl solution: Electrochemical and quantum chemical studies

Chitosan biopolymer effect on copper corrosion in 3.5 wt.% NaCl solution: Electrochemical and quantum chemical studies

Study of lifetime of Platinum Modified Metal Oxides Electrodes

Electrochemical Study of the Synergistic Effect of Two Copper Corrosion Inhibitors, Nicotinic Acid (NAC) and Nicotinamide (NAM) in Two Different Media

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