Bacterial attachment to stainless steel welds: Significance of substratum microstructure
| Autor: | Kurissery R. Sreekumari, Yasushi Kikuchi, K. Nandakumar |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Heat-affected zone
Materials science Metallurgy technology industry and agriculture Adhesion Welding respiratory system Aquatic Science Microstructure Applied Microbiology and Biotechnology Corrosion law.invention Metal law visual_art Surface roughness visual_art.visual_art_medium Base metal Water Science and Technology |
| Zdroj: | Biofouling. 17:303-316 |
| ISSN: | 1029-2454 0892-7014 |
| Popis: | AISI Type 304 L stainless steel (SS) is a widely used material in industry due to its strength and resistance to corrosion. However, corrosion on SS is reported largely at welds or adjacent areas. Bacteria were observed to colonize preferentially near welds as a result of surface roughness. In the present study, the influence of another important metal surface condition on bacterial adhesion has been evaluated, i.e. substratum microstructure. Type 304 L SS weld samples were prepared and machined to separate weld metal, the heat affected zone (HAZ) and base metal regions. The coupons were molded in resin so that only the surfaces polished to a 3 p.m finish were exposed to the experimental medium with Pseudomonas sp. isolated from a corrosive environment in Japan. The coupons were exposed for varying durations. The area of bacterial attachment showed significant differences with time of exposure and; the type of coupons. Generally, the weld metal samples showed more attachment whilst the base metal showed t... |
| Databáze: | OpenAIRE |
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