SYMPOSIA PAPER Published: 01 January 1997

Monitoring Biofilm Formation in Power Plant Environments


Power plants have experienced severe general corrosion, pitting, under deposit corrosion, and microbiologically influenced corrosion (MIC) in cooling water systems, resulting in decreased plant availability and significantly increased operations and maintenance costs. MIC has been a particularly difficult problem since corrosion resistant alloys in relatively benign environments have failed as a result of microbiological influences in short times. Copper base alloys, carbon steels and stainless steels have all been susceptible. In a number of instances, replacement of piping and heat exchangers has been required to alleviate corrosion-related problems.

Monitoring is a key element to improved corrosion control in cooling water systems. On-line methods provide evaluations of corrosion rates in real time and are sensitive to localized corrosion. Electrochemical methods of corrosion measurement are readily automated, both for acquisition of corrosion data and for process control. An electrochemical probe for on-line monitoring of biofilm activity has been shown to provide an early warning of biofilm formation and incipient MIC in fresh and saline waters.

Author Information

Licina, GJ
Structural Integrity Associates, San Jose, California
Nekoksa, G
Corrosion Failure Analysis and Control, San Ramon, California
Price: $25.00
Contact Sales
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Developed by Committee: G01
Pages: 1–19
DOI: 10.1520/STP11355S
ISBN-EB: 978-0-8031-5358-5
ISBN-13: 978-0-8031-2025-9