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Impedance based method for non-contact determination of the corrosion rate in buried metallic structures / Michel Keddam in European journal of environmental and civil engineering, Vol. 15 N° 7 (Août 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1097-1103 Titre : Impedance based method for non-contact determination of the corrosion rate in buried metallic structures Type de document : texte imprimé Auteurs : Michel Keddam, Auteur ; Ramon X. Novoa, Auteur ; Beatriz Puga, Auteur Année de publication : 2011 Article en page(s) : pp. 1097-1103 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Corrosion  monitoring  Contact-less  method  Electrochemical  impedance  spectroscopy Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The electrochemical impedance spectroscopy has been employed in the present investigation to assess the polarisation resistance of carbon steel rebars in different electrolytes. The measurements have been performed using the classical 3-electrode arrangement, where the element under test is the working electrode of the potentiostat, and a new 4-electrode arrangement where the element under test is floating from the electrical point of view (e.g. contact-less technique). The polarisation resistance values obtained using the contact-less technique are very close to those obtained using the traditional 3-electrode arrangement. The measurements, performed in a wide range of electrolyte resistivity values (including mortar) have thus demonstrated the applicability of this new technique for on-site corrosion rate assessment. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16510 [article] Impedance based method for non-contact determination of the corrosion rate in buried metallic structures [texte imprimé] / Michel Keddam, Auteur ; Ramon X. Novoa, Auteur ; Beatriz Puga, Auteur . - 2011 . - pp. 1097-1103. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 7 (Août 2011) . - pp. 1097-1103 Mots-clés : Corrosion  monitoring  Contact-less  method  Electrochemical  impedance  spectroscopy Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : The electrochemical impedance spectroscopy has been employed in the present investigation to assess the polarisation resistance of carbon steel rebars in different electrolytes. The measurements have been performed using the classical 3-electrode arrangement, where the element under test is the working electrode of the potentiostat, and a new 4-electrode arrangement where the element under test is floating from the electrical point of view (e.g. contact-less technique). The polarisation resistance values obtained using the contact-less technique are very close to those obtained using the traditional 3-electrode arrangement. The measurements, performed in a wide range of electrolyte resistivity values (including mortar) have thus demonstrated the applicability of this new technique for on-site corrosion rate assessment. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16510