Corrosion of carbon steel under sequential aerobic-anaerobic environmental conditions

被引：64
|
作者：
El Hajj, H. [1 ]
Abdelouas, A. [1 ]
El Mendili, Y. [1 ]
Karakurt, G. [1 ]
Grambow, B. [1 ]
Martin, C. [2 ]
机构：
[1] Univ Nantes, Ecole Mines Nantes, CNRS, SUBATECH,UMR 6457,IN2P3, F-44307 Nantes 3, France
[2] French Natl Radioact Waste Management Agcy ANDRA, F-92298 Chatenay Malabry, France
来源：
CORROSION SCIENCE | 2013年 / 76卷
关键词：
Steel; SEM; Raman spectroscopy; XRD; Atmospheric corrosion; Microbiological corrosion; CALLOVIAN-OXFORDIAN FORMATION; GAMMA-FE2O3; NANOPARTICLES; EXTERNAL CORROSION; RAMAN-SPECTROSCOPY; SP NOV; IRON; MECHANISM; BACTERIA;
D O I：
10.1016/j.corsci.2013.07.017
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We investigated sequential aerobic and anaerobic microbiologically induced corrosion of carbon steel to simulate deep geological disposal conditions. Under limited oxygen supply, lepidocrocite and magnetite corrosion products formed on the steel coupon, while under continuous oxygen supply, a mixture of lepidocrocite, maghemite and magnetite was identified. Upon oxygen consumption and establishment of sulphidogenic conditions, due to sulphate-reducing bacteria activity, all these oxides disappeared via transformation into pyrrhotite. Corrosion rate of steel in direct anaerobic cultures was higher than that of steel initially corroded in aerobic condition, suggesting a protective role of corrosion product layer -formed under sequential aerobic-anaerobic conditions. (C) 2013 Elsevier Ltd. All rights reserved.
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页码：432 / 440
页数：9
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