Corrosion Inhibition of Brass by Aromatic Azole Derivatives and Surfactants in Neutral Chloride Solution

Abstract

Copper and its alloys are widely used in industry because of their excellent electrical and thermal conductivity and are often used in heating and cooling water systems. Brass has been widely used as a stubbing material for condensers and heat exchangers in various cooling water systems. Brass is susceptible to a corrosion process known as dezincification and this tendency increases with increasing zinc content of the brass. During the past decade, many techniques have been used to minimize the dezincification of brass and recently many methods have been developed aiming at reduction of the rate of dezincification of brass involving the use of some inhibitors. Furthermore, the foremost problems in cooling water systems are not only corrosion but also scaling, or encrustation and biological fouling phenomena. Scaling involves deterioration of metallic surfaces by the aggressive medium, Encrustation decreases thermal efficiency and can cause localized corrosion attack, whereas biological fouling leads to microbiologically influenced corrosion (MIC) or biocorrosion. These processes, occurring simultaneously, greatly affect the normal industrial production and have numerous economic impacts. Thus this issue has become a significant area of scientific and technological research. newline