Search
Filters
Close

51316-7335-The Impact of Microbial Activity on Infrastructure Pipeline Coatings

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.

Product Number: 51316-7335-SG
ISBN: 7335 2016 CP
Author: Angela Reese
Publication Date: 2016
$0.00
$20.00
$20.00

Fusion bonded epoxy (FBE) coatings protect the underlying metal from corrosion by creating a barrier against corrosive chemicals and moisture. However, pipeline coatings fail due to cathodic corrosion, disbonding, improper application, or improper curing being investigated as root causes. Rarely is microbial activity considered, even though microorganisms can degrade bisphenol, a component of FBE coatings. Research in the waste industry has demonstrated that microorganisms can corrode concrete sewers and other protective surfaces including concrete linings, cement based coatings, and epoxy-mortar coatings. 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. One pipeline was so newly constructed that cathodic protection (CP) had not yet been installed. Nevertheless, it developed a deep pit (80%) in less than a year. The other pipeline had CP, but corroded at 1 mm/year. Quantitative polymerase chain reactions (qPCR) analysis revealed moderate to high levels of Microbiologically Influenced Corrosions (MIC) organisms. This led us to investigate the potential ability of microorganisms to degrade/disbond pipeline coatings through genetic analysis, evaluating the possibility of corrosion on coated coupons in a laboratory simulated environment, and qPCR analysis. The results will be used to understand the potential implications of MIC on FBE coatings.

Key words: downloadable, FBE coatings, microbiologically influenced corrosion, MIC, pipe failure, coating failure

Fusion bonded epoxy (FBE) coatings protect the underlying metal from corrosion by creating a barrier against corrosive chemicals and moisture. However, pipeline coatings fail due to cathodic corrosion, disbonding, improper application, or improper curing being investigated as root causes. Rarely is microbial activity considered, even though microorganisms can degrade bisphenol, a component of FBE coatings. Research in the waste industry has demonstrated that microorganisms can corrode concrete sewers and other protective surfaces including concrete linings, cement based coatings, and epoxy-mortar coatings. 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. One pipeline was so newly constructed that cathodic protection (CP) had not yet been installed. Nevertheless, it developed a deep pit (80%) in less than a year. The other pipeline had CP, but corroded at 1 mm/year. Quantitative polymerase chain reactions (qPCR) analysis revealed moderate to high levels of Microbiologically Influenced Corrosions (MIC) organisms. This led us to investigate the potential ability of microorganisms to degrade/disbond pipeline coatings through genetic analysis, evaluating the possibility of corrosion on coated coupons in a laboratory simulated environment, and qPCR analysis. The results will be used to understand the potential implications of MIC on FBE coatings.

Key words: downloadable, FBE coatings, microbiologically influenced corrosion, MIC, pipe failure, coating failure

Also Purchased
Picture for 00755 PIPELINE COATING FAILURE - NOT ALWAYS
Available for download

00755 PIPELINE COATING FAILURE - NOT ALWAYS WHAT YOU THINK 1T IS

Product Number: 51300-00755-SG
ISBN: 00755 2000 CP
Author: Dennis Neal
$20.00
Picture for 10003 Study of a Failure a Decohesion Failure in a Three Layer Coating of a 24" Gas Pipeline
Available for download

10003 Study of a Failure a Decohesion Failure in a Three Layer Coating of a 24" Gas Pipeline in Veracruz in South East Mexico

Product Number: 51300-10003-SG
ISBN: 10003 2010 CP
Author: Lagos, Magana, Lopez, Padilla, Canto, Villamizar, Escalera, Ascencio, and Martinez
Publication Date: 2010
$20.00
Picture for 00764 COATING QUALITY TESTING OF DIRECTIONALLY
Available for download

00764 COATING QUALITY TESTING OF DIRECTIONALLY DRILLED PIPE SECTIONS

Product Number: 51300-00764-SG
ISBN: 00764 2000 CP
Author: R.A. Gummow, S.M. Segall, and R.G. Wakelin
$20.00