THE INFLUENCE OF BIOCIDES ON THE MICROBIOLOGICALLY INFLUENCED CORROSION OF MILD-STEEL AND BRASS

The role of sulfate-reducing bacteria in the anaerobic corrosion of mi ld steel and brass was studied. Culture-media containing sulfide of bi ogenic and of chemical origin was used to see the effect of metal-sulf ide layers developed in different ways. Biocides with different effici ency were used to inhibit metabolic activity of bacteria. Polarization resistances and open circuit potentials were recorded followed by pot entiostatic polarization measurements on the metal samples to get info rmation on corrosion rates and the mechanism of corrosion processes. A n atomic force microscope was used to image the topography of sulfide layers. (C) 1997 Elsevier Science Ltd.