Synergistic Corrosion Inhibition of Cold Rolled Steel by Methyl Violet and Chloride Ions in Sulphuric Acid Solution

Wang, Lin; Yang, Fa-Chang; Ma, Jing; Fang, Z; Zhang, Shiwen; Guo, Qiang; Lu, Kaili; Wang, Yang-Xia

doi:10.14233/ajchem.2013.15284

Cited by 6 publications

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“…It contains nitrogen atoms unshared electron pairs and abundant π‐electrons heterocyclic. Wang et al studied the corrosion inhibition of methyl violet and chloride ion for steel in sulfuric acid (H 2 SO 4 ) solution. The results indicated that there was a synergistic inhibition between MV and chloride ion for the steel corrosion in H 2 SO 4 solution and the inhibition efficiency reached to 91% even at 10 µmol/dm 3 MV, but chloride ion concentration was higher.…”

Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of mild steel by methyl violet and bromide ion in sulfuric acid solution

Wang

Zhang

Guo

et al. 2014

Materials and Corrosion

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The corrosion inhibition behavior of methyl violet in the absence and presence of bromide ion on mild steel in sulfuric acid solution has been studied by weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy. The results indicate that the corrosion of mild steel is obviously reduced by methyl violet in combination with bromide ion. Electrochemical studies show that methyl violet and bromide ion act as mixed type inhibitors retarding the cathodic and anodic corrosion reactions with emphasis on the former and do not change the mechanism of either hydrogen evolution reaction or mild steel dissolution. The corrosion reaction is controlled by charge-transfer process. The adsorption of the inhibitors on the mild steel surface obeys the Langmuir adsorption isotherm model. The calculated thermodynamic and kinetic parameters (DG o ads , DH o ads , DS o ads , K ads , and E a ) reveal a strong interaction between inhibitors and mild steel surface. The values of DG o ads show that the inhibitors are adsorbed on the mild steel surface in sulfuric acid by chemical adsorption mechanism.

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Section: Introductionmentioning

confidence: 99%

Corrosion inhibition of mild steel by methyl violet and bromide ion in sulfuric acid solution

Wang

Zhang

Guo

et al. 2014

Materials and Corrosion

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Evaluation of Inhibition Efficiency of 1-(2-pyridylazo) -2-naphthol and Bromide Ion on the Corrosion of Mild Steel in Sulphuric Acid Solution

Wang¹

2016

International Journal of Electrochemical Science

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The corrosion inhibition of mild steel in 0.5 mol/L sulphuric acid solution by bromide ion in the absence and presence of 1-(2-pyridylazo)-2-naphthol (PAN) has been studied by potentiodynamic polarization, electrochemical impedance spectroscopy and weight loss. Potentiodynamic polarization researches show that single bromide ion or the complex of bromide ion and PAN acts as a mixed-type inhibitor and do not change the mechanism of either hydrogen evolution reaction or metal dissolution. The charge transfer process controls the corrosion reaction. The studies reveal that the complex of bromide ion and PAN shows a quite well inhibition and their synergistic effect was observed and discussed. The adsorption of the inhibitors on the steel surface obeys the Langmuir adsorption isotherm. The thermodynamic parameters such as adsorptive equilibrium constant (K ads ), adsorption free energy (ΔG

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Investigation of Synergistic Inhibition Effect of Methyl Violet and Bromide on the Corrosion of Mild Steel in Phosphoric Acid Solution

Wang¹

2016

International Journal of Electrochemical Science

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The inhibition of mild steel corrosion in 1.0 mol/dm 3 phosphoric acid (H 3 PO 4 ) solution by methyl violet without and with bromide ion was studied using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy methods. The results indicate that combination of methyl violet and bromide ion performs excellent as inhibitor for mild steel corrosion in 1.0 mol/dm 3 H 3 PO 4 and a stronger synergistic effect exists between methyl violet and bromide ion. The electrochemical results indicate that single methyl violet or combination of bromide ion and methyl violet behaves as mixed type inhibitor with predominated of cathodic effect, and the corrosion reaction is controlled by charge transfer process. It is found that the adsorption process obeys Temkin adsorption isotherm in the absence of bromide ion and Langmuir adsorption isotherm in the presence of bromide ion, respectively. The thermodynamic and kinetic parameters (ΔG o ads , ΔH o ads ,ΔS o ads , K ads and E a ) were calculated and discussed. The adsorption of inhibitor molecules on the steel surface is a spontaneous process containing physisorption and chemisorption. The outcomes from weight loss study are well in agreement with those obtained from electrochemical measurements.

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Synergistic Corrosion Inhibition of Cold Rolled Steel by Methyl Violet and Chloride Ions in Sulphuric Acid Solution

Cited by 6 publications

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Corrosion inhibition of mild steel by methyl violet and bromide ion in sulfuric acid solution

Corrosion inhibition of mild steel by methyl violet and bromide ion in sulfuric acid solution

Evaluation of Inhibition Efficiency of 1-(2-pyridylazo) -2-naphthol and Bromide Ion on the Corrosion of Mild Steel in Sulphuric Acid Solution

Investigation of Synergistic Inhibition Effect of Methyl Violet and Bromide on the Corrosion of Mild Steel in Phosphoric Acid Solution

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