TITLE:
Microbiological Induced Corrosion on Brass in Recycling Cooling Water System Makeup by Reclaimed Water
AUTHORS:
Ping Xu, Zhaoyi Xu, Jin Wang, Yajun Zhang, Ting Liu
KEYWORDS:
Reclaimed Water; Brass; Microbiologically Induced Corrosion; Corrosion Potential; Corrosion Current Density; Average Corrosion Ratio; Temperature; Concentration Ratio
JOURNAL NAME:
Materials Sciences and Applications,
Vol.3 No.4,
April
18,
2012
ABSTRACT: The impacts of microorganism on brass corrosion were studied in static experiment in this paper. Two main factors, temperature and concentration ratio, were considered. According to the actual operation of recycling cooling water system, four temperatures (15℃, 25℃, 35℃ and 45℃) and four concentration ratios (1, 2.5, 3.5 and 4.5) were selected in the experiment. Corrosion potential, current density, average corrosion rate were measured by time. The results showed that: Microorganism often aggravated corrosion of brass during initial and final stages, but alleviated its corrosion at the middle time. With the extension of time that brass immersed in the solution, the microbes began to intensify the corrosion of the metal. When concentration ratios were 2.5 and 3.5 and temperature was 15℃, microbe promoted brass corrosion obviously and corrosion degrees.