RESEARCH ON THE ST3 CARBON STEEL CORROSION IN THE PRESENCE OF MICROORGANISMS ISOLATED FROM THE GROUNDWATER AT THE YENISEISKIY SITE

The paper presents the experimental study exploring the corrosion of carbon steel St3 samples in the presence of a microbiological community sampled at the Yeniseiskiy site and the microbiota of bentonite clays. Depending on the conditions, an average 3—30-fold increase in the corrosion rate of steel was observed due to the biogenic and biogenic-mediated processes. The maximum steel degradation effect was observed at a temperature of 50 °C in the presence of sulfate ions under conditions being considered optimal for sulfate-reducing bacteria. The developed steel corrosion model was used to determine the activation energy of the aerobic and anaerobic corrosion process.

 

Keywords: carbon steel, microbial corrosion, anaerobic corrosion, aerobic corrosion, sulfate-reducing bacteria, geochemical modeling, PHREEQC, radioactive waste.