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| Titel: |
Inhibition of metal corrosion by bacteria |
| Auteur: |
Pedersen, Amelie Hermansson, Malte |
| Verschenen in: |
Biofouling |
| Paginering: | Jaargang 3 (1991) nr. 1 pagina's 1-11 |
| Jaar: |
1991-02 |
| Inhoud: |
Corrosion inhibition of steel (ASTM A619) by two marine isolates, Pseudomonas sp.S9 and Serratia marces-cens EF190, was investigated by weight loss measurements of metal coupons placed in static batch cultures. Artificial seawater with (VNSS) and without (NSS) nutrients was used. The effects of bulk- and surface localised cells were compared. Adhesion of cells to the metal surface was quantified microscopically. Corrosion was inhibited in suspensions of high cell density (109.ml-1). The protective effect remained when the metal coupons were separated from the cells by a dialysis membrane. Also, a monolayer of cells on the metal surface lowered the corrosion if immersed in a suspension of sterile filtered spent NSS, but not in fresh sterile NSS. When the metal in fresh sterile NSS was coated with stearic acid however, the attached cells exerted a limited protection. Corrosion of metal coupons occurred in cell-free suspensions of both VNSS and NSS and in low cell-density (106.ml-1). Glutaraldehyde-fixed cells (109.ml-1) did not inhibit corrosion. Protection is suggested to be caused by cellular metabolic activity, including a decrease of the oxygen content. The attached cells may also form a protective film which may lower the diffusion or corrosion products from the surface. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 8 gevonden artikelen
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