| Biofilms ennobled the open circuit potential, E;The E;Marine biofilms tended to decrease initiation times for crevice corrosion on stainless alloys. However, in most cases the difference between the initiation times in natural and control coastal seawaters was not statistically significant. Biofilms increased propagation of crevice corrosion for stainless alloys by factors ranging from 2 on S30400 to 1000 on N08904. Theoretical weight losses for samples in remote crevice assembly experiments were calculated from the current vs. time records, and they were in good agreement with directly measured weight losses. The increase in propagation rate of crevice corrosion on biofilmed vs. bare samples was due to an increase in the kinetics of the cathode reaction on the biofilmed surface. |
