Effect of the molecular structure of some quinones on their corrosion inhibiting action

Stoyanova, Antonia; Slavcheva, E.

doi:10.1002/maco.200905579

Cited by 6 publications

(3 citation statements)

References 30 publications

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“…Organic compounds are often used as inhibitors [1][2][3] in acidic media, but their wide application requires designing additional substances with effective protective properties. This process is based on the correlation between the molecular structure of the organic compounds and their inhibiting properties [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. The substances of the quaternary ammonium salts group [18][19][20][21] show good inhibitive properties in acidic media.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Electrochemical Impedance Measurement of Mild Steel Corrosion in an Acidic Medium, in the Presence of Quaternary Ammonium Bromides

Popova

Vasilev

Deligeorgiev

2018

Port. Electrochim. Acta

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Three quaternary ammonium bromides were investigated as mild steel corrosion inhibitors in 1 M HCl. Two investigation methods were applied: electrochemical impedance spectroscopy (EIS) and polarization resistance (Rp method). The experimental impedance data showed capacitance frequency distribution, which imposed the introduction of a constant phase element, instead of a pure capacitance. Adequate structural models were advanced, to describe the interfacial processes. The models parameters values were determined. The resistance values found by impedance spectroscopy were compared to those of the polarization resistance provided by the Rp method. The inhibition efficiency of the investigated compounds was evaluated by both applied methods. The comparison of the investigated compounds' protective properties outlined the best among them.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the Electrochemical Impedance Measurement of Mild Steel Corrosion in an Acidic Medium, in the Presence of Quaternary Ammonium Bromides

Popova

Vasilev

Deligeorgiev

2018

Port. Electrochim. Acta

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“…However, the mechanism of how heterocyclic organic compounds form the adsorption film on the metal surface yet is not resolved. [7][8][9] Since 1947, benzotriazole (BTAH) had been considered as an efficient corrosion inhibitor for copper and its alloys. [10][11][12][13] For the low cast, its hydroxy derivative, 1-hydroxybenzotriazole (BTAOH) also has been discussed as corrosion inhibitor for copper, 8,[14][15][16] although it shows a lower inhibition efficient (IE) than BTAH.…”

Section: Introductionmentioning

confidence: 99%

1-hydroxy Benzotriazole as Corrosion Inhibitor for Mild Steel in 1 mol/L Hydrochloric Acid Solution

Guo

et al. 2017

Electrochemistry

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The inhibition ability of 1-hydroxy benzotriazole (BTAOH) for mild steel in HCL solution (1 mol/L) had been investigated in this manuscript. The inhibition efficiency of BTAOH showed a maximum value around 48% at 303 K, with the concentration 1.5 × 10 −3 mol/L. The physical adsrobed BTAOH molecules are more stable attached onto the mild steel surface than the corrosion products. The similar free energy of adsorption (ΔG 0 ads ) but much lower IE were ascribed to the thicker but less compact film constructed by the zig-zag H-bond connected BTAOH polymers. According to the effects of concentration and temperature on the adsorption behavior of the BTAOH, we had calculated the ΔG

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“…Some authors have suggested the use of quinones of low reduction potential as corrosion inhibitors. 18 Other studies with similar quinones, in contrast, have shown that the addition of quinones can increase the corrosion of aluminum in aqueous acidic solutions 19 and the corrosion of steel in black liquor. 20 More recently, Schindelholz et al observed that C-22 corroded at surprisingly high rates (circa 20 mm y −1 ) at room temperature in a pharmaceutical liquor containing 2,3-dichloro-5,6dicyano-1,4-benzoquinone (DDQ) and HCl in acetonitrile.…”

mentioning

confidence: 97%

The Influence of Acidity, Chlorides and a High-Potential Quinone on the Corrosion of Hastelloy C-22 in Nonaqueous Solutions

Dick¹,

Beekwilder²,

Kelly³

2020

J. Electrochem. Soc.

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The corrosion of Hastelloy C-22 at room temperature in acetonitrile (MeCN) solutions containing various concentrations of tetrabutylammonium chloride (Bu4NCl), HCl and 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) was investigated, mimicking aggressive environments used in the synthesis of pharmaceuticals. In the absence of sources of Cl–, C-22 is passive in MeCN. In neutral MeCN containing Bu4NCl, C-22 undergoes pitting upon anodic polarization. C-22 presents an active-passive transition in MeCN with 5 mM HCl. In HCl concentrations above 5 mM, C-22 is completely active and icorr increases with HCl concentration. Comparing with the literature in aqueous corrosion of C-22, the breakdown of passivity in MeCN takes place at much lower chloride additions. The corrosion in MeCN/HCl/DDQ solutions can achieve surprisingly high rates, as seen in electrochemical tests (icorr = 6.5 mA cm−2) and mass loss tests (penetration rate > 10 mm y−1), due to the oxidizing power of DDQ. In equimolar concentration, HCl and DDQ have a synergistic effect on the elevation of the cathodic kinetics of C-22 corrosion, due to the effects of acidity on the reduction of DDQ.

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Effect of the molecular structure of some quinones on their corrosion inhibiting action

Cited by 6 publications

References 30 publications

Evaluation of the Electrochemical Impedance Measurement of Mild Steel Corrosion in an Acidic Medium, in the Presence of Quaternary Ammonium Bromides

Evaluation of the Electrochemical Impedance Measurement of Mild Steel Corrosion in an Acidic Medium, in the Presence of Quaternary Ammonium Bromides

1-hydroxy Benzotriazole as Corrosion Inhibitor for Mild Steel in 1 mol/L Hydrochloric Acid Solution

The Influence of Acidity, Chlorides and a High-Potential Quinone on the Corrosion of Hastelloy C-22 in Nonaqueous Solutions

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