The role of 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiol in the inhibition of nickel–aluminum bronze alloy corrosion: electrochemical and DFT studies

Musa, Ahmed Y.; Khadom, Anees A.; Kadhum, Abdul Amir H.; Takriff, Mohd Sobri; Mohamad, Abu Bakar

doi:10.1007/s11164-011-0328-5

Cited by 24 publications

(5 citation statements)

References 27 publications

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“…Numerous methods have been used to overcome corrosion issues, the most effective and economic of which is the use of corrosion inhibitors for the protection of metals, especially in acidic media [6,7]. Organic compounds containing heteroatoms such as nitrogen, oxygen or sulphur and multiple bonds are well recognized as efficient corrosion inhibitors for metals and alloys that allowing greater adsorption on the metal surface [8,9].…”

Section: Introductionmentioning

confidence: 99%

New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

2015

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Two new Schiff base cationic surfactants were synthesized and their chemical structures confirmed using FTIR spectroscopy. The tensioactive and thermodynamic characteristics of their solutions were determined using surface tension/log concentration plots. The protection performance of the synthesized compounds against carbon steel corrosion in 1 M HCl solution was evaluated using weight loss and electrochemical techniques. The compounds were found to be excellent corrosion inhibitors, and their efficiency increased with increasing inhibitor concentration. The mode of adsorption obeyed the Langmuir adsorption isotherm. Polarization curves showed that the two compounds were mixed-type inhibitors. The temperature dependence of the corrosion rate in the absence and presence of these compounds was studied in a temperature range of 303 to 333 K using the weight loss data. Activation parameters E a , DH a o , and DS a o were determined and discussed. In addition, the presence of a protective film on the carbon steel surface was confirmed using scanning electron microscopy (SEM).

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Section: Introductionmentioning

confidence: 99%

New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

2015

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“…The near‐planar structure of C 7 H 7 N 5 S molecule facilitates the occurrence of adsorption behavior. In general, the absolute value of Δ G 0 lies between 20 kJ mol −1 and 40 kJ mol −1 , indicating that the adsorption mechanism of C 7 H 7 N 5 S on LY12CZ aluminum in 3.5% NaCl solution involves both physisorption and chemisorption . Electro‐negative atoms like nitrogen and sulfur, aromatic rings and multiple bonds in the molecules are beneficial to the stable adsorption of C 7 H 7 N 5 S on the metal surface.…”

Section: Resultsmentioning

confidence: 99%

Corrosion inhibition of LY12CZ aluminum alloy by 3‐pyridyl‐4‐amino‐1,2,4‐triazole‐5‐thiol and its cerium nitrate compound

Liu

Sun

2018

Materials & Corrosion

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The inhibition effect of 3‐pyridyl‐4‐amino‐1,2,4‐triazole‐5‐thiol (C7H7N5S) and its cerium nitrate (Ce(NO3)3) compound on the corrosion of LY12CZ aluminum in 3.5% NaCl was investigated by means of potentiodynamic polarization (PP), electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and energy dispersive spectrometer (EDS). Results showed that the inhibition efficiency reached 77.61% at 0.8 g L−1 concentration and was found to increase with increasing concentration of C7H7N5S. C7H7N5S is a mixed type inhibitor. The desorption onset potential was obtained from differential polarization curve. EDS data indicated that C7H7N5S can adsorb on the S phase and inhibit the cathode action of the S phase. Both kinetic and thermodynamic parameters were calculated and discussed. The adsorption of C7H7N5S on aluminum surface was found to obey the Langmuir adsorption isotherm, and being both physisorption and chemisorption. C7H7N5S and Ce(NO3)3 have an additive inhibition effect. The additive action improved the surface coverage of the aluminum and the stability of the adsorbed layer.

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“…[6,7] Most organic compounds currently used as corrosion inhibitors have in their structure heterocyclic systems, containing N, S, and O atoms; as well as polar groups, such as -OH and -NH 2 ; and double/triple bonds. The presence of heteroatoms and electrons play an important role in the adsorption of these compounds on the metallic surface [8][9][10][11][12] by interactions between nonbinding electrons and/or π electron clouds of the donor atoms to the metal surface, thus reducing the corrosion attacks. Although many of these compounds have high inhibition efficiencies, they may also present high operating costs or side effects; even in small concentrations, they may be toxic to humans or harmful to the environment.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

Figueredo

Vera

Molinari

2019

Materials & Corrosion

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In the present study, the activity of extracts obtained from the stems of two endemic species of the central–northern region of Chile (Eulychnia acida [Copao] and Echinopsis chiloensis [Quisco]), was evaluated as potential corrosion inhibitors for carbon steel in 0.1 M HCl. The total content of phenols and flavonoids in the extracts was determined, and the main components were identified by high‐performance liquid chromatography–mass spectrometry, being similar in both species. The inhibition efficiency of extracts was evaluated by mass loss measures, Tafel polarization curves, and electrochemical impedance spectroscopy. The assay results showed similar values in inhibition percentages, around 88% at extract concentrations of 1,500 ppm. The adsorption on the steel surface followed the Langmuir model adsorption isotherm, whose thermodynamic parameters (ΔG°ads for Copao and Quisco, −17.81 and −17.70 kJ/mol, respectively) suggest a physisorption mechanism. The scanning electron microscopy analyses showed that in the presence of the extracts, the surface of the steel is covered by a thin film that allows the sanding marks to be visualized; while without the extracts the surface is rough due to the HCl corrosion effect.

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The role of 4-amino-5-phenyl-4H-1,2,4-triazole-3-thiol in the inhibition of nickel–aluminum bronze alloy corrosion: electrochemical and DFT studies

Cited by 24 publications

References 27 publications

New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

New Schiff base cationic surfactants as corrosion inhibitors for carbon steel in acidic medium: weight loss, electrochemical and SEM characterization techniques

Corrosion inhibition of LY12CZ aluminum alloy by 3‐pyridyl‐4‐amino‐1,2,4‐triazole‐5‐thiol and its cerium nitrate compound

Evaluation of Eulychnia acida and Echinopsis chiloensis (Cactaceae) extracts in inhibiting corrosion of carbon steel in HCl solution

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