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Morphology of corrosion products of steel in concrete under macro-cell and self-corrosion conditions / D. Neff in Materials and corrosion, Vol. 62 N° 9 (Septembre 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 9 (Septembre 2011) . - pp. 861–871 Titre : Morphology of corrosion products of steel in concrete under macro-cell and self-corrosion conditions Type de document : texte imprimé Auteurs : D. Neff, Auteur ; J. Harnisch, Auteur ; M. Beck, Auteur Année de publication : 2011 Article en page(s) : pp. 861–871 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Corrosion  Concrete  Chlorides  Iron  hydroxychloride  X-ray  tomography  Raman  spectroscopy Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this paper investigations into the formation of specific corrosion products during the process of chloride induced corrosion of steel in concrete are presented. The extension of corrosion products within concrete was established by means of X-ray tomography analyses. Then a detailed analysis of the nature of corrosion products has been conducted by means of Raman micro-spectroscopy and energy dispersive spectroscopy. Results emphasize two different corrosion patterns. The first one is composed of shallow cavities, where mostly magnetite and goethite were identified, traducing aerated to moderate aerated conditions in these media. The second pattern was identified as deep, needle-like pits, where chlorinated-iron-oxides phases were present associated with more or less important chloride enrichments. The presence of these particular species is indicating low redox and low pH conditions within these pits. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005861/abstract [article] Morphology of corrosion products of steel in concrete under macro-cell and self-corrosion conditions [texte imprimé] / D. Neff, Auteur ; J. Harnisch, Auteur ; M. Beck, Auteur . - 2011 . - pp. 861–871. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 9 (Septembre 2011) . - pp. 861–871 Mots-clés : Corrosion  Concrete  Chlorides  Iron  hydroxychloride  X-ray  tomography  Raman  spectroscopy Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : In this paper investigations into the formation of specific corrosion products during the process of chloride induced corrosion of steel in concrete are presented. The extension of corrosion products within concrete was established by means of X-ray tomography analyses. Then a detailed analysis of the nature of corrosion products has been conducted by means of Raman micro-spectroscopy and energy dispersive spectroscopy. Results emphasize two different corrosion patterns. The first one is composed of shallow cavities, where mostly magnetite and goethite were identified, traducing aerated to moderate aerated conditions in these media. The second pattern was identified as deep, needle-like pits, where chlorinated-iron-oxides phases were present associated with more or less important chloride enrichments. The presence of these particular species is indicating low redox and low pH conditions within these pits. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005861/abstract