Corrosion inhibition of armco iron in 1 M HCl media by new bipyrazolic derivatives

Touhami, F.; Aouniti, A.; Abed, Y.; Hammouti, B.; Kertit, S.; Ramdani, Abdelkrim; Elkacemi, Kacem

doi:10.1016/s0010-938x(99)00123-7

Cited by 179 publications

(62 citation statements)

References 10 publications

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“…The decrease in double layer capacitance (C dl ) value (Table 3) in presence of PCIP as compared to that in its absence can be attributed to a decrease in the dielectric constant or increase in the thickness of the electrical double layer, which suggests the adsorption of PCIP at the metal/solution interface [29]. The C dl can be calculated as follows:…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Expired Podocip drug as potential corrosion inhibitor for carbon steel in acid chloride solution

2018

Int. J. Corros. Scale Inhib.

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The application of expired drugs as corrosion inhibitors provides a cost effective and environmentally benign alternative to otherwise tedious and costly disposal/degradation process. In this context, we have investigated the use of expired Podocip (PCIP) drug as corrosion inhibitor for carbon steel in 1 M HCl by weight loss and electrochemical methods. Polarization curves revealed that the inhibiting action of the PCIP is mixed-type. The adsorption of PCIP on carbon steel surface obeys the Langmuir isotherm. Impedance analysis showed that the presence of inhibitor considerably affects the charge transfer resistance and the double layer capacitance of carbon steel surface. SEM and AFM studies evidenced the formation of a protective film over metal surface.

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Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Expired Podocip drug as potential corrosion inhibitor for carbon steel in acid chloride solution

2018

Int. J. Corros. Scale Inhib.

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“…And the strong correlation (R 2 > 0.97) indicates that the adsorption of BTAOH on mild steel surface obeys to Langmuir isotherm. Moreover, the adsorption equilibrium constant can be deduced from the intercept of the fitting straight line on the C/H-axis, and it can be used to calculate the standard free energy of adsorption (ÁG Table 2, and the value is 740.74 L/mol and [28][29][30][31] In general, when the absolute value of ÁG 0 ads is no more than 20 KJ/mol, the interaction between inhibitor molecules and metal surface is electrostatic force (physisorption), while for that is no less than 40 KJ/mol, the interaction between inhibitor and metal surface may include sharing and transfer of electrons from organic molecules to the metal surface to form a coordinate type bond (chemisorption). 28,29 In this job, the ¹26.76 KJ/mol of ÁG 0 ads value means the adsorption of BTAOH on mild steel surface is physisorption.…”

Section: Adsorption Considerationsmentioning

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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“…The corrosion at the metal/solution interface is controlled by charge transfer resistance [21][22][23]. While dc methods such as polarization curves do not provide sufficient information on poorly conducting layers, alternate current methods such as electrochemical impedance spectroscopy have proved useful in studying the properties of polymer-coated metals and their changes during exposure to a corrosive medium [24,25].…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Excellent Anticorrosion Behavior of Ruta Graveolens Extract (RGE) for Mild Steel in Hydrochloric Acid: Electro Analytical Studies on the Effect of Time, Temperature, and Inhibitor Concentration

2016

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The corrosion inhibition behavior of Ruta graveolens extract (RGE) for mild steel in 1 M HCl is studied using gravimetric and electrochemical techniques. 1-4 V/V% RGE is added to the corrosive media and analyzed. Gravimetric measurements conducted at different time intervals reveal the potential activity of RGE in the system investigated. RGE exhibits 95 % inhibition efficiency in the investigated system for 7 days of exposure time. Electrochemical impedance spectroscopic studies show that mild steel is protected 98 % from corrosion in 1 M HCl in the presence of RGE. Potentiodynamic polarization study agrees this observation showing 99 % inhibition efficiency and also reveals the mixed type inhibition behavior of RGE. One of the active constituents of Ruta graveolens, Rutin is also monitored for its inhibition behavior and is found to be active. The theoretical parameters obtained for rutin also stands for the good inhibition potential of the extract. Both RGE and Rutin show a decrease in inhibition efficiency as the temperature raised. Adsorption behavior of RGE is according to Langmuir isotherm and that of Rutin obeys Temkin isotherm.

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Corrosion inhibition of armco iron in 1 M HCl media by new bipyrazolic derivatives

Cited by 179 publications

References 10 publications

Expired Podocip drug as potential corrosion inhibitor for carbon steel in acid chloride solution

Expired Podocip drug as potential corrosion inhibitor for carbon steel in acid chloride solution

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

Excellent Anticorrosion Behavior of Ruta Graveolens Extract (RGE) for Mild Steel in Hydrochloric Acid: Electro Analytical Studies on the Effect of Time, Temperature, and Inhibitor Concentration

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