Electrochemical study of carbon steel corrosion in buffered acetic acid solutions with chlorides and H2S

Veloz, M.A.; González, Ignacio

doi:10.1016/s0013-4686(02)00549-2

Cited by 186 publications

(75 citation statements)

References 26 publications

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“…Several authors have suggested that this inductive behaviour may be attributed to the relaxation process obtained by adsorbing species such as Cl ads -and H ads ? onto the surface of the electrode [22][23][24]. The corresponding Bode plots in Fig.…”

Section: Ac Electrochemical Resultsmentioning

confidence: 99%

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Emran

2013

Res Chem Intermed

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The electrochemical behaviour and corrosion resistance of glassy Fe 68.6 Ni 28.2 Mn 3.2 (at%) specimens were studied in different concentrations of HCl solutions. The results indicated that the corrosion rate increased with increasing concentration of the HCl solutions. Electrochemical impedance spectroscopy results were analysed by fitting the experimental data to an equivalent circuit using the ZSim Demo program, and suitable equivalent circuit models were determined. The results obtained from the impedance and polarization measurements are in good agreement. The thermodynamic parameters were evaluated for the corrosion process and discussed.

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Section: Ac Electrochemical Resultsmentioning

confidence: 99%

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Emran

2013

Res Chem Intermed

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“…The first capacitive loop at high frequencies (HF) represents the phenomenon associated with electrical double layer. The presence of the inductive loop at LF may be attributed to the relaxation process obtained by adsorption species like H þ ads , on the electrode surface [28][29][30][31]. It may also be attributed to the adsorption of inhibitor molecules on the electrode surface or to the re-dissociation of the passivated surface at low frequencies.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄

John

Joy

Prajila

et al. 2011

Materials & Corrosion

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The interaction of 4-amino-4H,3,5-di(methoxy)-1,2,4-triazole (ATD), (4-(benzylideneamino)-4H-1,2,4-triazole-3,5-diyl) dimethanol (BATD), and (4-(4-(dimethylamino) benzylideneamino))-4H-1,2,4-triazole-3,5-diyl) dimethanol (DBATD) on copper in 1 N sulfuric acid was investigated by potentiodynamic polarization (Tafel), ac impedance (EIS), molecular dynamic (MD) studies, and quantum chemical calculations at 300 K. Polarization studies clearly showed that ATD, BATD, and DBATD act as mixed type inhibitors. As the electron density around the inhibitor molecule increases due to substitution, the inhibition efficiency also increases correspondingly. Quantum chemical approach was used to calculate some electronic properties of these molecules to ascertain the correlation between inhibitive effect and molecular structure. Both the experimental and theoretical studies agree well in this regard and confirm that DBATD is having a better interaction with the metal surface in 1 N sulfuric acid than BATD and ATD. The adsorption behaviors of these molecules on the copper surface have been studied using MDs method and density functional theory.

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“…These are not perfect semicircles, because the Nyquist plots obtained in the real system represent a general behavior where the double layer at the metal solution interface does not behave as an ideal capacitor [32][33]. The LF inductive loop R L -L can be attributed to relaxation process obtained by adsorbed sulphate ions and protons [34][35]. The point of intersection between inductive loop and the real axis represents (R s + R ct ) .…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Studies on Corrosion of Annealed and Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Medium

Poornima¹,

Nayak²,

Shetty³

2010

Port. Electrochim. Acta

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The corrosion behavior of aged and annealed sample of 18 Ni 250 grade maraging steel was investigated in varied conditions of concentration and temperature of sulphuric acid medium, using electrochemical techniques like Tafel polarization and electrochemical impedance spectroscopy (EIS). The results obtained from both the techniques are in good agreement. These results have shown increase in corrosion rate of aged specimen with increase in concentration and temperature of sulphuric acid. With increase in concentration of sulphuric acid from 0.025 M to 0.25 M the corrosion rate of annealed sample was found to increase, but there after in 0.5 M, 0.75 M and 1 M, the rate of corrosion decreases, indicating passivation of alloy surface at higher concentration of sulphuric acid. The corrosion rate of aged specimen was found to be higher than that of the annealed specimen. Similar observations are revealed by SEM images. The thermodynamic parameters like activation energy, enthalpy of activation and entropy of activation were calculated.

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Electrochemical study of carbon steel corrosion in buffered acetic acid solutions with chlorides and H2S

Cited by 186 publications

References 26 publications

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄

Studies on Corrosion of Annealed and Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Medium

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Electrochemical study of carbon steel corrosion in buffered acetic acid solutions with chlorides and H2S

Cited by 186 publications

References 26 publications

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Effects of concentration and temperature on the corrosion properties of the Fe–Ni–Mn alloy in HCl solutions

Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H2SO4

Studies on Corrosion of Annealed and Aged 18 Ni 250 Grade Maraging Steel in Sulphuric Acid Medium

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Electrochemical, quantum chemical, and molecular dynamics studies on the interaction of 4‐amino‐4H,3,5‐di(methoxy)‐1,2,4‐triazole (ATD), BATD, and DBATD on copper metal in 1N H₂SO₄