Types of Corrosion Inhibitors

What are corrosion inhibitors?

Corrosion Inhibitors are used in both open & closed recirculating cooling water treatment products. Benzotriazole (BZT) is a similar, but less common inhibitor. Sodium Molybdate is also used in cooling water treatment as a corrosion inhibitor. Molybdenum is used both as an inhibitor and as a trace chemical to monitor dosage measurements due to its yellow color.

Sodium Nitrite is another common metal corrosion inhibitor for iron & steel and is typically used in closed-loop cooling water treatment products, such as chiller systems. (Other allied products which accompany these products are borates which act as buffers/stabilizers and have general cleaning attributes as well.)


  • Borax 10 Mol Granular (buffer)
  • HPAA Hydroxyphosphonoacetic Acid
  • Sodium Nitrite, coated
  • Sodium Molybdate
  • Sodium Tetraborate
  • Wintrol® B Benzotriazole, solid
  • Wintrol® B-35PG Benzotriazole in PG
  • Wintrol® B-P Benzotriazole, powder
  • Wintrol® CT Sodium Tolyltriazole, 50% Liquid
  • Wintrol® SAM-38Na Copper Bullet®
  • Wintrol® T Tolyltriazole, 99.5%, Solid
  • Wintrol® T-50Na Sodium Tolyltriazole, 50% Liquid