[article]
| Titre : |
The anatomy of tubercles : a corrosion study in a fresh water estuary |
| Type de document : |
texte imprimé |
| Auteurs : |
R. I. Ray, Auteur ; J. S. Lee, Auteur ; B. J. Little, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
pp. 993–999 |
| Note générale : |
Génie mécanique |
| Langues : |
Anglais (eng) |
| Mots-clés : |
Carbon steel corrosion goethite iron-oxidizing bacteria lepidocrocite magnetite tubercle |
| Résumé : |
The structure and mineralogy of corrosion products formed on carbon steel coupons exposed in Duluth Superior Harbor (DSH, USA), were investigated and compared with corrosion products on similar substrata from other locations. Corrosion products in DSH form within a few months each year and are removed by ice scour and reform. The corrosion products formed in DSH are tubercles with an outer surface, an inner shell of magnetite, and a core of iron(III) oxyhydroxides, goethite, and lepidocrocite, in association with stalks produced by bacteria. In general, the tubercles formed in DSH are similar in morphology and mineralogy to corrosion products described for carbon steel and cast iron exposed to treated waters in decades-old drinking water and cooling water systems. DSH tubercles are unique in several structural details. DSH tubercles increase areal coverage of the substratum by consolidation of tubercles. Furthermore, the core material extends into the pit and is an exact replica of the pit profile. |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1002/maco.201005739/abstract |
in Materials and corrosion > Vol. 61 N° 12 (Décembre 2010) . - pp. 993–999
[article] The anatomy of tubercles : a corrosion study in a fresh water estuary [texte imprimé] / R. I. Ray, Auteur ; J. S. Lee, Auteur ; B. J. Little, Auteur . - 2011 . - pp. 993–999. Génie mécanique Langues : Anglais ( eng) in Materials and corrosion > Vol. 61 N° 12 (Décembre 2010) . - pp. 993–999
| Mots-clés : |
Carbon steel corrosion goethite iron-oxidizing bacteria lepidocrocite magnetite tubercle |
| Résumé : |
The structure and mineralogy of corrosion products formed on carbon steel coupons exposed in Duluth Superior Harbor (DSH, USA), were investigated and compared with corrosion products on similar substrata from other locations. Corrosion products in DSH form within a few months each year and are removed by ice scour and reform. The corrosion products formed in DSH are tubercles with an outer surface, an inner shell of magnetite, and a core of iron(III) oxyhydroxides, goethite, and lepidocrocite, in association with stalks produced by bacteria. In general, the tubercles formed in DSH are similar in morphology and mineralogy to corrosion products described for carbon steel and cast iron exposed to treated waters in decades-old drinking water and cooling water systems. DSH tubercles are unique in several structural details. DSH tubercles increase areal coverage of the substratum by consolidation of tubercles. Furthermore, the core material extends into the pit and is an exact replica of the pit profile. |
| En ligne : |
http://onlinelibrary.wiley.com/doi/10.1002/maco.201005739/abstract |
|
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