Publication Details |
| Category | Text Publication |
| Reference Category | Journals |
| URL | http://www.iwaponline.com/wst/04408/wst044080103.htm |
| Title (Primary) | Corrosion protection by anaerobiosis |
| Author | Volkland, H.P.; Harms, H.; Wanner, O.; Zehnder, A.J.B. |
| Source Titel | Water Science and Technology |
| Year | 2001 |
| Department | UMB |
| Volume | 44 |
| Issue | 8 |
| Page From | 103 |
| Page To | 106 |
| Language | 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. |
| Persistent UFZ Identifier | 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 |
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