Corrosion inhibition of carbon-steel with 2-mercaptobenzimidazole in hydrochloric acid

Morales-Gil, Perla; Walczak, Mateusz; Camargo, C. Ruiz; Cottis, R.A.; Romero, Juan M.; Lindsay, Robert

doi:10.1016/j.corsci.2015.08.032

Cited by 61 publications

(34 citation statements)

References 34 publications

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“…The differences in

E_{corr}

value in Tables S1–S5 are about 40 mV/(Ag/AgCl) relative to the

E_{corr}

in the blank solution, indicating that studied compounds could be regarded as mixed‐type inhibitors . The inhibitors act possibly through simple blocking effect due to adsorption of NTA‐ n , namely reducing the area exposed to corrosive media. It is expected that with the increasing of inhibitor concentration, the coverage ratio (θ) of the inhibitor on the steel surface will become larger, and the uncovered surface (1−θ) will become less, which will interrupt the access of

H^{+}

and

{CI}^{- 1}

to the metal surface .…”

Section: Resultsmentioning

confidence: 94%

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Chen

Jiang

Cheng

et al. 2019

Materials & Corrosion

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A new series of N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides (designated as NTA‐n, n = 8, 10, 12, 14, and 16) were synthesized. The electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization showed that NTA‐n could protect availably X70 steel from attack of HCl with an inhibition efficiency of about 95%. And the inhibition ability follows the following sequence: NTA‐8 < NTA‐10 < NTA‐12 < NTA‐14 < NTA‐16, suggesting that prolonging alkyl chain may enhance the inhibition capacity of the molecules. Theoretical investigation backs up well the experiment results. The correlation of theoretical calculation with the experiment results illustrated clearly double logarithmic relations between the corrosion current and the computed quantum chemical parameters such as the highest occupied molecular orbital energy ( E HOMO), energy gap (ΔE), molecular volume ( ν), electronegativity ( χ), the total energy of iron crystal with the adsorbed inhibitor molecule ( E total), the interaction energy of Fe (1 0 0) surface and inhibitor molecules ( E inhibitor), while an equation resembling Hammet relation was existed between the corrosion currents and the fraction of electrons transfer (ΔN). These linear correlations suggest the relation of the inhibitor structure with its inhibition activity: long alkyl chain and electron donating groups in NTA‐n will enhance the corrosion efficiency.

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“…The differences in

E_{corr}

value in Tables S1–S5 are about 40 mV/(Ag/AgCl) relative to the

E_{corr}

H^{+}

and

{CI}^{- 1}

to the metal surface .…”

Section: Resultsmentioning

confidence: 94%

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Chen

Jiang

Cheng

et al. 2019

Materials & Corrosion

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“…Unfortunately, because of the presence of Clions this acid is highly corrosive. The use of organic inhibitors is the most practical and effective method for the protection of ferrous materials [10][11][12][13][14][15][16][17]. Generally, molecules containing nitrogen, sulfur, oxygen and aromatic rings are preferred [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Studies on Corrosion Inhibition Performance of Phenanthroline for Cast Iron in Acid Solution

Idir¹,

Kellou-Kerkouche

2018

J. Electrochem. Sci. Technol

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The corrosion inhibition of cast iron in 1 M HCl by Phenanthroline (Phen) was investigated using potentiodynamic polarization (PDP) curves, electrochemical impedance spectroscopy (EIS), surface analysis and theoretical calculations. It is found that Phen exhibits high inhibition activity towards the corrosive action of HCl and its adsorption obeys the Langmuir adsorption isotherm model. The results showed that inhibition efficiency increases with Phen concentration up to a maximum value of 96% at 1.4 mM, and decreases slightly with the increase in temperature. The free adsorption energy value indicates that Phen adsorbs on cast iron surface in 1 M HCl via a simultaneous physisorption and chemisorption mechanism. Scanning electron microscopy (SEM) micrographs, atomic force microscopy (AFM) and FTIR analysis confirmed the formation of a protective film on cast iron surface, resulting in the improvement of its corrosion resistance in the studied aggressive solution. Quantum chemical calculations at the DFT level were achieved to correlate electronic structure parameters of Phen molecules with their adsorption mode.

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“…Benzimidazole (BI) and its derivatives were used to inhibit the corrosion of metals in a corrosive medium. [11][12][13][14][15][16][17][18] J. Aljourani et al 11 researched the BI, 2-methylbenzimidazole and 2-mercaptobenzimidazole as corro-sion inhibitors for mild steel in the 1M HCl solution; they found that these inhibitors retarded both the cathodic and anodic processes and that the inhibition efficiency was increased with an inhibitor concentration in the order of 2-mercaptobenzimidazole > 2-methylbenzimidazole > BI. Recently, P. Morales-Gil et al 19 found that the IE of 2-mercaptobenzimidazole for carbon steel in the 1M hydrochloric acid is 99 %, with a concentration of 2 mM.…”

Section: Introductionmentioning

confidence: 99%

Benzimidazole and its derivatives as corrosion inhibitors for mild steel in hydrochloric acid

Li¹,

Wang²,

He³

et al. 2018

Mater. Tehnol.

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Using potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS), the inhibition ability of benzimidazole (BI), 2-methylthiobenzimidazole (2-MBI) and 2-chloromethylbenzimidazole (2-CBI) for mild steel in an HCl solution (1 mol L-1) was investigated. With an increase in the concentration, 2-MBI showed the highest inhibition efficiency (IE) at 1.24×10-3 mol L-1 , while the IE of BI and 2-CBI increased continuously within the investigated concentration range. The IE increased in the order of BI < 2-MBI < 2-CBI, which was further confirmed by the morphologies of the mild-steel surfaces after their immersion in 1M HCl with or without different inhibitors. Fitted adsorption isotherm curves suggested that the adsorption of the three inhibitors onto the mild steel in 1M HCl follow the Langmuir adsorption isotherm. Considering the effects of the temperature on the adsorption behaviour of the inhibitors, the apparent activation energy (Ea) of the mild-steel corrosion in the HCl solution with BI, 2-MBI and 2-CBI was calculated as (42.00, 48.28 and 67.93) kJ mol-1 , respectively.

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Corrosion inhibition of carbon-steel with 2-mercaptobenzimidazole in hydrochloric acid

Cited by 61 publications

References 34 publications

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

New surfactants N‐alkyl‐N,N‐dimethyl‐N‐(3‐thienylmethylene)ammonium bromides: Preparation and anticorrosion evaluation

Experimental and Theoretical Studies on Corrosion Inhibition Performance of Phenanthroline for Cast Iron in Acid Solution

Benzimidazole and its derivatives as corrosion inhibitors for mild steel in hydrochloric acid

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