Laboratory Evaluation of a Multi-Array Sensor for Detection of Underdeposit Corrosion And/or Microbially Influenced Corrosion

Abstract

Abstract Real-time coupled multielectrode array sensors (MAS) and other monitoring tools were used to evaluate the corrosion of carbon steel and stainless steel in a laboratory based recirculating flow loop simulating an industrial cooling water system. The design and implementation of the monitoring system and results are discussed in this paper. Characterization of the degree and depth of attack from the MAS probe showed good correlation with characterization of underdeposit attack on corrosion coupons that were exposed simultaneously with the MAS probe. In addition, sensor response was altered in the presence of microorganisms suggesting the possible influence of biofilm and/or microbial products on corrosion rates and sensor signals.