Patent ID: 6077445
Filing Date: 2000-06-20
Classification: C02F

Abstract:
In an aqueous system to which an effective amount of an oxidizing biocide is added for the control of microbiological growth, a method for minimizing the formation of corrosion in said system, which comprises:(a) establishing a target oxidation-reduction potential (ORP) level;(b) establishing a maximum corrosion rate;(c) continuously measuring the ORP level and the corrosion rate in said system;(d) comparing the ORP level to the target ORP level to regulate the addition of said oxidizing biocide;(e) comparing the corrosion rate to the maximum corrosion rate; and(f) adding an effective amount of a non-oxidizing biocide to said system, while reducing the amount of oxidizing biocide added when the maximum corrosion rate is reached, to maintain said control of microbiological growth and said corrosion below the maximum corrosion rate.