Abstract
Biocides are used to combat micro fouling on metallic surfaces in sea water systems. The interaction between the biocidal properties of chemicals added to sea water and their influence on promoting or inhibiting corrosion processes on various metals and its alloys have drawn less attention to corrosion researchers. In this study an attempt has been made to analyze corrosion processes occurring on CDA 706 in synthetic sea water containing low and high concentration of sulfide added with glutaraldehyde as biocide. DC and AC electrochemical techniques were used to study the effect of glutaraldehyde on the corrosion of CDA 706 in sulfide polluted sea water. DC polarization and AC impedance studies were found to be in general agreement with each other for various concentration of glutaraldehyde added with sulfide polluted synthetic sea water. Under stagnant condition it is found that there was an increase in corrosion rate for lower concentration of sulfide in the presence of glutaraldehyde. Generally, the addition of glutaraldehyde as biocide to the sulfide polluted system alters the corrosion tendency for the individual system of sulfide.
