Influence of the sulphate reducing bacteria on API-X70 steel corrosion

被引：7
|
作者：
Rodriguez-Hernandez, M. [2 ]
Galvan-Martinez, R. [1 ]
Orozco-Cruz, R. [1 ]
Martinez, E. A. [1 ]
Torres-Sanchez, R. [2 ]
机构：
[1] Univ Veracruzana, Inst Ingn, Unidad Anticorros, Boca Del Rio 94294, Ver, Mexico
[2] Univ Michoacana, Inst Invest Met, Morelia 58000, Michoacan, Mexico
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2009年 / 60卷 / 12期
关键词：
MECHANISM; BIOFILM;
D O I：
10.1002/maco.200905221
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The corrosion behaviour of API X70 immersed in a specific medium with a strain of thermophilic sulphate reducing bacteria (SRB) was analysed. Anaerobic corrosion test was carry out for 32 days at 50 degrees C. During the exposure time, pH, sulphate (SO42-) and hydrogen sulphide (H2S) concentration were measured. corrosion potential, linear polarization resistance and potentiodynamic polarization curve were used in order to get the influence of the SRB in the corrosion phenomenon. Scanning electron microscopy was used to determine corrosion morphology. Results show that the SRB activity influenced the overall corrosion process. The anodic branches in the polarization curves show a passivity feature, whereas, the cathodic branches were not affected. A localized corrosion attack was found.
引用
收藏
页码：982 / 986
页数：5
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