Problèmes:

• Carryover of feedwater into stream, produce Carbon Dioxide in stream leading to formation of carbonic acid (acid attack)
• Primary source of scale in heat exchange equipment.
• Causes boiler and water line deposits.
• Corrosion of water lines, boiler, return lines, heat exchanger equipments, etc. (oxygen attack).
• Corrosion occurs when pH drops below 8.5
• Corrosion
• Scale in boilers and cooling water systems

Méthode de traitement chimique commune:

• Neutralizing amines, filming amines, combination of both and lime-soda.
• Lime softening, phosphate, chelates and polymers.
• Phosphate, chelates and polymers
• Oxygen scavengers, filming amines and deaeration.
• pH can be lowered by addition of acids and increased by addition of alkalies
• Chlorination
• Lime softening

• Biocides: for microbiological control.
  • Oxidizing biocides (bleach, bromine, chlorine gas, BCDMH, calcium hypochlorite, chlorine dioxide, hydrogen peroxide, iodine, ozone) or our patented BIOXY S
  • Nonoxidizing biocides (isothiazolin, gluteraldehyde, DBNPA, MBT) or our unique POLY QUAT
• Scale Inhibitors: to protect heat transfer surfaces and cooling system from scale.
  • Phosphates (sodium tripolyphosphate, sodium hexametaphosphate, TKPP)
  • Phosphonates (HEDP, AMP, PBTC)
  • Polymers (polycarboxylates, polyacrylates, polymaleic acid, maleic anhydride copolymer, acrylate/AMPS copolymer, acrylate/AMPS/sulfonated styrene terpolymer, acrylate/sulfonic acid/nonionic terpolymer) – many are dispersants too.

• Corrosion Inhibitors: to protect metal surfaces from corrosion.
  • Phosphates (orthophosphate, sodium tripolyphosphate, sodium hexametaphosphate, TKPP)
  • Phosphonates (HPA and others)
  • Zinc
  • Silicates
  • TT (Tolyltriazole – for yellow metals)
  • BZT (Benzotriazole – for yellow metals)
  • Molybdate
• Antifoams: surface-active chemicals that reduce foaming.
  • Silicone and non-silicone blends