Phosphonates for Corrosion Protection.

Bardon’s uses two primary phosphonate corrosion inhibitors for cooling towers and boilers are HEDP and PBTC as a component of the total formulation. HEDP provides control of the deposition of polyvalent metal ions in cooling water and other aqueous processes.Also controls calcium and other metal ions such as iron and manganese. PBTC is especially effective in systems that use oxidizing biocides such as chlorine and bromine. HEDP is also very effective in processes that are using chlorine and bromine.