Novel treatment strategies involving intermittent (continuous) dosing of chloromethyl- methylisothiazolone (CMIT/MIT) biocide with slug doses of glutaraldehyde was shown to control microbially-influenced corrosion and biofouling by sulfate-reducing bacteria (SRB) in model systems. Reduced biocorrosion was shown using linear polarization resistance and corrosion coupons. Biofouling on metal surfaces was monitored by biochemical analysis of biofilms. Efficacy was related to the biocide treatment level and dosing frequency. More frequent dosing of CMIT/MIT at low concentrations resulted in improved control.
Keywords: isothiazolone, biocide, corrosion, glutaraldehyde, SRB, biofouling