An analytical approach that can discriminate between various forms of microscopic corrosion initiation has been employed in natural gas gathering and storage facilities. Information provided by the analysis of electron microscope coupons has led toward the better understanding and diagnosis of the initial stages of internal corrosion in natural gas gathering and storage facilities.
Biocorrosion or microbiologically influenced corrosion (MIC) is a major problem in the oil and gas industry. Biofilms are the culprits of MIC. In this work, D-amino acids were used to enhance two biocides, alkyldimethylbenzylammonium chloride (ADBAC) and tributyl tetradecyl phosphonium chloride (TTPC), to treat a field biofilm consortium on C1018 carbon steel coupons.
Fusion bonded epoxy (FBE) coatings protect the underlying metal from corrosion. The lack of research on the microbial impact of pipeline coating failures leaves a significant knowledge gap. We analyzed two FBE coating samples from buried steel transmission pipelines with unusually rapid external pitting.
Corrosive biofilm formation on metal surfaces can have serious impacts. Through this proof of concept research project we established and maintained MIC biofilms for testing with various enzyme preparations. After two months of incubation in a bioreactor inoculated with a consortium of MIC microorganisms, the presence of corrosive MIC biofilms were confirmed on steel coupons.