CobaltMaghrebV1, Main, Exploration, bibRecord, 000756

Synergistic effect of methyl red dye and potassium iodide on inhibition of corrosion of carbon steel in 0.5M H2SO4

Identifieur interne : 000756 ( Main/Exploration ); précédent : 000755; suivant : 000757

Synergistic effect of methyl red dye and potassium iodide on inhibition of corrosion of carbon steel in 0.5M H2SO4

Auteurs : Salah Merah ; Lahcene Larabi ; Omar Benali ; Yahia Harek

Source :

Pigment & Resin Technology [ 0369-9420 ] ; 2008-09-12.

RBID : ISTEX:D925361BDA4B5A39959D218BB5982BE6B73E7662

Abstract

Purpose This paper aims to show the effectiveness of methyl red MR alone and in combination with KI as corrosion inhibitor for carbon steel in 0.5M H2SO4. Designmethodologyapproach Corrosion rates charge transfer resistance values were determined using gravimetric and electrochemical techniques. The efficiency of inhibition was calculated by comparing corrosion rates and charge transfer resistance values in absence and presence of the inhibitor, while the mechanism of inhibition was proposed by considering temperature influence on corrosion and inhibition processes. Findings The inhibition efficiency of MR increased with concentration and synergistically increased in the presence of the KI. Polarisation curves reveal that MR is a mixed type inhibitor. Changes in impedance parameters were indicative of adsorption of MR on the metal surface. The trend of inhibition efficiency with temperature suggests that inhibitor molecules are physically adsorbed on the corroding metal surface in the absence of KI and chemically adsorbed in its presence. MR was found to obey Langmuir adsorption isotherm both with and without KI. Originalityvalue Electrochemical techniques have been used for the first time to study synergistic effect of MR dye and potassium iodide on inhibition of corrosion of carbon steel in H2SO4.The results suggest that the mixture MRKI could find practical application in corrosion control in aqueous acidic environment.

Url:

https://api.istex.fr/document/D925361BDA4B5A39959D218BB5982BE6B73E7662/fulltext/pdf

DOI: 10.1108/03699420810901963

Affiliations:

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Le document en format XML

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<front><div type="abstract">Purpose This paper aims to show the effectiveness of methyl red MR alone and in combination with KI as corrosion inhibitor for carbon steel in 0.5M H2SO4. Designmethodologyapproach Corrosion rates charge transfer resistance values were determined using gravimetric and electrochemical techniques. The efficiency of inhibition was calculated by comparing corrosion rates and charge transfer resistance values in absence and presence of the inhibitor, while the mechanism of inhibition was proposed by considering temperature influence on corrosion and inhibition processes. Findings The inhibition efficiency of MR increased with concentration and synergistically increased in the presence of the KI. Polarisation curves reveal that MR is a mixed type inhibitor. Changes in impedance parameters were indicative of adsorption of MR on the metal surface. The trend of inhibition efficiency with temperature suggests that inhibitor molecules are physically adsorbed on the corroding metal surface in the absence of KI and chemically adsorbed in its presence. MR was found to obey Langmuir adsorption isotherm both with and without KI. Originalityvalue Electrochemical techniques have been used for the first time to study synergistic effect of MR dye and potassium iodide on inhibition of corrosion of carbon steel in H2SO4.The results suggest that the mixture MRKI could find practical application in corrosion control in aqueous acidic environment.</div>
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Synergistic effect of methyl red dye and potassium iodide on inhibition of corrosion of carbon steel in 0.5M H2SO4

Synergistic effect of methyl red dye and potassium iodide on inhibition of corrosion of carbon steel in 0.5M H2SO4

Source :

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri