Abstract
The weight loss method, electrochemical impedance spectroscopy (EIS) and surface analysis methods were employed to investigate the corrosion behavior of steel A3 under the combined effect of Streptomyces and Nocardia sp. Results showed that the combined effect of Streptomyces and Nocardia sp markedly increased the corrosion tendency of steel A3, decreased the impedance value and increased the corrosion current density of the electrode after 21 days of exposure. Corrosion mass loss rate in the mixed colonies solution was more than the sum of the loss rate for each individual microorganism. Scanning electron microscopy (SEM) results indicated that localized corrosion occurred on the steel A3 coupon immersed in the mixed colonies solution. The combined effect of Streptomyces and Nocardia sp aggravated the corrosion of steel A3.
| Original language | English |
|---|---|
| Pages (from-to) | 921-927 |
| Number of pages | 7 |
| Journal | Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica |
| Volume | 25 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 2009 |
Keywords
- Electrochemical impedance spectroscopy
- Microbiologically influenced corrosion
- Mixed colony
- Nocardia sp
- Polarization curve
- Streptomyces
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