Details zur Publikation |
Kategorie | Textpublikation |
Referenztyp | Zeitschriften |
URL | http://www.iwaponline.com/wst/04408/wst044080103.htm |
Titel (primär) | Corrosion protection by anaerobiosis |
Autor | Volkland, H.P.; Harms, H.; Wanner, O.; Zehnder, A.J.B. |
Quelle | Water Science and Technology |
Erscheinungsjahr | 2001 |
Department | UMB |
Band/Volume | 44 |
Heft | 8 |
Seite von | 103 |
Seite bis | 106 |
Sprache | englisch |
Abstract | Biofilm-forming bacteria can protect mild (unalloyed) steel from corrosion. Mild steel coupons incubated with Rhodoccocus sp. strain C125 and Pseudomonas putida mt2 in an aerobic phosphate-buffered medium containing benzoate as carbon and energy source, underwent a surface reaction leading to the formation of a corrosion-inhibiting vivianite layer [Fe3(PO4)2]. Electrochemical potential (E) measurements allowed us to follow the buildup of the vivianite cover. The presence of sufficient metabolically active bacteria at the steel surface resulted in an E decrease to -510 mV, the potential of free iron, and a continuous release of ferrous iron. Part of the dissolved iron precipitated as vivianite in a compact layer of two to three microns in thickness. This layer prevented corrosion of mild steel for over two weeks, even in a highly corrosive medium. A concentration of 20 mM phosphate in the medium was found to be a prerequisite for the formation of the vivianite layer. |
dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=6892 |
Volkland, H.P., Harms, H., Wanner, O., Zehnder, A.J.B. (2001): Corrosion protection by anaerobiosis Water Sci. Technol. 44 (8), 103 - 106 |