Abstract
The electrochemical measurement and surface analysis methods were carried out to investigate the corrosion behavior of steel A3 in Thiobacillus ferrooxidans, streptomyces and T. f-streptomyces mixed colony systems. Results showed that asymmetric biofilms adhered on the surface of steel A3 after 7 days of exposure in different corrosive systems; pitting corrosion occurred on the surface of steel A3 after 7 days of exposure in T. f and streptomyce solutions, but an even corrosion appeared in T. f-streptomyces mixed colony solution; weight loss in the mixed colony system was between those caused by each individual microorganisms; the electrochemical impedance spectroscopy results indicated that the impedance value of steel A3 in the mixed colony system was the medium of those in T. f and streptomyces system. Above results revealed that the most serious corrosion occurred in the streptomyces system, secondly for the T. f-streptomyces mixed colony solution, and corrosiveness of the T. f solution was the lightest to steel A3.
| Original language | English |
|---|---|
| Pages (from-to) | 67-74 |
| Number of pages | 8 |
| Journal | Acta Chimica Sinica |
| Volume | 68 |
| Issue number | 1 |
| State | Published - 14 Jan 2010 |
Keywords
- Corrosion
- Electrochemical impedance spectroscopy
- Mixed colonies
- Streptomyces
- Thiobacillus ferrooxidans
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