Assessing the source of the corrosion on carbon steel heat exchanger tubes supplied with groundwater (2012)

Assessing the source of the corrosion on carbon steel heat exchanger tubes supplied with groundwater (2012)

Goal : to determine the source of the soiling and significant penetrations in the carbon steel tubes of a series of heat exchangers and offer corrective actions

  • Audit of the cooling circuit supplied with groundwater : history of the operating conditions, analysis of the industrial process, observation of the damage
  • Measuring physical and chemical parameters and taking samples of the water and deposits
  • Chemical analysis of the cooling water : major anions and cations, trace elements, total sulphides, dissolved and total iron
  • Bacteriological analysis of the cooling water : iron bacteria, sulphate-reducing bacteria (SRB) and thiosulphate-reducing bacteria (TRB)
  • Chemical, mineralogical and bacteriological analysis of the deposits
  • Chemical stripping of a heat exchanger tube sample
  • Proposal for optimising the operating conditions so as to prevent the development of bacterial microflora and limit the corrosion-erosion phenomena
  • Recommendations for a bactericidal treatment
  • Proposal for an instrument to measure biocorrosion: CFG MIC SENSOR®

Photo caption: Iron-cycle filamentous bacteria responsible for clogging up the heat exchangers