Goals and content of CYTED-D scientific cooperation program. CYTED XV: Biocorr information net for biocorrosion and biofouling in industrial systems
✍ Scribed by H.A. Videla
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 92 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0964-8305
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✦ Synopsis
The interactions between cathodic protection (CP) and anaerobic biotilms of mixed sulphate reducing bacteria (SRB) on AISI 304L stainless steel (SS) were studied using scanning electron microscopy (SEM) and occasionally through energy dispersion X-ray analyses (EDXA). SS samples were protected by applying -0.7 and -0.9 V potential levels during different exposure periods ranging between 3 h and 14 days. According to our results, the number of attached SRB did not decrease when CP was applied on SS coupons. These results differ from those obtained with aerobic bacterial biofilms. Under CP, biotilm structural characteristics were different from those formed on SS without protection as shown by SEM. Inorganic deposits were also modified by the biological activity. Pitting attack was observed for both protected and unprotected samples when SRB were present.