HEDP 50
(1-Hydroxyethylidene-1,1- Diphosphonic Acid)
HEDP (1-Hydroxyethylidene-1,1- Diphosphonic Acid) 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 acid.
These products used in cooling water treatment, soaps and
detergents, antiscalant formulations for oilfields, reverse osmosis
and sugar processing. Known for their pure nature, these products
can also be used in peroxide bleaching.
Application:
Low pressure boiler and corrosion inhibition.
Dye-fixing agent in dyeing industry
Metallurgy, fertilizer and other industrial cooling water
system
HEDP 50% is used in the textile industry, used as metal and
non-metallic cleaning agent
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 Deg. 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.
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