Microbiological Induced Corrosion on Brass in Recycling Cooling Water System Makeup by Reclaimed Water

Ping Xu, Zhaoyi Xu, Jin Wang, Yajun Zhang, Ting Liu

Key Laboratory of Urban Stormwater System and Water Environment, Beijing University of Civil Engineering and Architecture, Ministry of Education, Beijing, China..
School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing, China.

DOI: 10.4236/msa.2012.34037                

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.

Keywords

Reclaimed Water; Brass; Microbiologically Induced Corrosion; Corrosion Potential; Corrosion Current Density; Average Corrosion Ratio; Temperature; Concentration Ratio

Conflicts of Interest

The authors declare no conflicts of interest.

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