AustralieFrV1, Main, Exploration, bibRecord, 006828

Physisorption vs grafting of aryldiazonium salts onto iron: A corrosion study

Identifieur interne : 006828 ( Main/Exploration ); précédent : 006827; suivant : 006829

Physisorption vs grafting of aryldiazonium salts onto iron: A corrosion study

Auteurs : Avni Berisha [France, Serbie] ; Catherine Combellas [France] ; Frederic Kanoufi [France] ; Jean Pinson [France] ; Fetah I. Podvorica [France, Serbie]

Source :

Electrochimica acta [ 0013-4686 ] ; 2011.

RBID : Pascal:12-0327046

Descripteurs français

Pascal (Inist)
- Physisorption, Fer, Inhibition corrosion, Composé du diazonium, Traitement surface, Benzènediazonium composé, Greffage électrochimique, Spectrométrie IRRAS.
Wicri :
- topic : Fer.

English descriptors

KwdEn :
- Corrosion inhibition, Diazonium compounds, Electrochemical grafting, Infrared reflection absorption spectroscopy, Iron, Physisorption, Surface treatment.

Abstract

The possible involvement of an adsorption step in the course of the electrografting of aryldiazonium salts is tested by investigating the effect of 3,5-dimethylbenzenediazonium and of 2,6-dimethyl benzene diazonium salts (respectively 3,5- and 2,6-DMBD) on the corrosion of iron. In the case of 3,5-DMBD, the grafting is confirmed by infra red reflection absorption spectroscopy (IRRAS). Polarization curves of iron modified electrodes show increased protection against corrosion, particularly in the presence of 3,5-DMBD in the corrosion medium. Conversely, in the presence of 2,6-DMBD, whose radical does not attach onto the iron surface, no inhibition is observed. This indicates that, besides the absence of grafting, there is no physical adsorption of diazoniums onto iron prior to the grafting reaction, in contrast with g_raphene and carbon nanotubes.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The possible involvement of an adsorption step in the course of the electrografting of aryldiazonium salts is tested by investigating the effect of 3,5-dimethylbenzenediazonium and of 2,6-dimethyl benzene diazonium salts (respectively 3,5- and 2,6-DMBD) on the corrosion of iron. In the case of 3,5-DMBD, the grafting is confirmed by infra red reflection absorption spectroscopy (IRRAS). Polarization curves of iron modified electrodes show increased protection against corrosion, particularly in the presence of 3,5-DMBD in the corrosion medium. Conversely, in the presence of 2,6-DMBD, whose radical does not attach onto the iron surface, no inhibition is observed. This indicates that, besides the absence of grafting, there is no physical adsorption of diazoniums onto iron prior to the grafting reaction, in contrast with g<sub>ra</sub>
phene and carbon nanotubes.</div>
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Physisorption vs grafting of aryldiazonium salts onto iron: A corrosion study

Physisorption vs grafting of aryldiazonium salts onto iron: A corrosion study

Source :

Descripteurs français

English descriptors

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