HEDP is an organophosphoric acid corrosion
inhibitor. It can chelate with Fe, Cu, and Zn ions to form stable chelating
compounds.It can dissolve the oxidized materials on these metals’ surfaces. HEDP shows excellent scale and corrosion
inhibition effects under temperature 250℃. HEDP has good chemical stability under
high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary
light and heat conditions. Its acid/alkali and chlorine oxidation tolerance are
better than that of other organophosphoric acids (salt). HEDP can react with metal ions in water
system to form hexa-element chelating complex, with calcium ion in particular.
Therefore, HEDP has good antiscale
and visible threshold effects. When built together with other water treatment
chemicals, it shows good synergistic effects.
The solid state of HEDP is crystal powder, suitable for usage
in winter and freezing districts. Because of its high purity, it can be used as
cleaning agent in electronic fields and as additives in daily chemicals.
Usage：HEDP is used as scale and corrosion inhibition in circulating cool water system, oil
field and low-pressure boilers in fields such as electric power, chemical
industry, metallurgy, fertilizer, etc.. In light woven industry, HEDP is used as detergent for metal and
nonmetal. In dyeing industry, HEDP is used as peroxide stabilizer and dye-fixing agent; In non-cyanide
electroplating, HEDP is used as chelating
agent. The dosage of 1-10mg/L is preferred as scale inhibitor, 10-50mg/L as
corrosion inhibitor, and 1000-2000mg/L as detergent. Usually, HEDP is used together with polycarboxylic
HEDP liquid: 200L plastic drum, BC(1000L)
HEDP solid: 25kg/bag