HEDP•Na2 is an organophosphonic acid corrosion inhibitor. It can
chelate with Fe, Cu, and Zn ions, and dissolve the oxidized
materials. This salt has good scale and corrosion inhibition
effects even under 250℃.
HEDP•Na2 is stable under high pH value, not easy to be hydrolyzed,
not easy to be decomposed under normal light and heat condition.
Its acid/alkaline and chloride oxidation tolerance are better than
that of other organophosph-onic acids.
HEDP•Na2 can form six-ring chelating compounds with metal ions in
water system, Ca2+ in particular. It has good scale inhibition
effects and obvious dissolution threshold effects. When used with
other Water Treatment Chemicals, the synergistic effect is better.
|Appearance||Colorless to yellowish transparent liquid||White powder|
|Active content (HEDP) %||16.5 min||74.0-79.0|
|Active content (HEDP•Na2) %||20.0 min||89.8 min|
|density (20℃) g/cm3||1.12-1.22||--|
|Fe, mg/L||--||35 max|
|Phosphorous acid (as PO33- ) %||--||3 max|
|pH (1% water solution)||4.0-6.0||4.0-6.0|
HEDP•Na2 is widely used in circulating cool water system, medium
and low pressure boiler, oil field water pipelines as scale and
corrosion inhibitor in fields such as electric power, chemical
industry, metallurgy, fertilizer, etc. HEDP•Na2 is used as
detergent for metal and nonmetal in light woven industry while in
dyeing industry, it is used as peroxide stabilizer and dye-fixing
agent. In non-cyanide electroplating, HEDP•Na2 is used as chelating
We are the manufacturer and exporter of water treatment
chemical，covering Organophosphates, Carboxylic Copolymer，
Bactericide and algaecide, Corrosion inhibitor, four series which
are mainly used in industrial water treatment of cooling towers,
power plants, boilers, RO systems, oil fields and in textiles.
The product we manufacture: