Figure 1 example of pipe showing internal corrosion pigging for biofilms bacteria within pipelines attach to internal surfaces and grow as biofilmsthe growth and maintenance of biofilms requires water and even a low concentration of water in crude oil pipelines or condensed water in gas pipelines can be sufficient to allow patches of water wet biofilms to grow. 1 introduction microbiologically influenced corrosion mic can occur in a wide variety of industrial environments including oil and gas pipelines sewage facilities cooling systems and power transmissionparticularly mic is one of the important factors that is threatening the service life of pipelines that are buried in soils approximately 20 . F m alabbas et al bacterial attachment to metal substrate and its effects on microbiologically influenced corrosion in transporting hydrocarbon pipelines journal of pipeline engineering 111 2012 63 72 google scholar. A there are several approaches that can be used to identify microbiologically influenced corrosion mic in pipelines corrosion monitoring using coupons in a bypass rack is one of the most common methods for detection the coupons can be easily removed and visually inspected for signs of mic
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