Description
Properties: 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 **0°C. 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. Specification: items index Appearance Clear, Colorless
to pale yellow aqueous solution White crystal powder Active content
(HEDP)% *8.***2.0 *0.0min Phosphorous acid (as PO**-)% 1.0 max 0.8
max Phosphoric acid (asPO**- )% 0.6 max 0.5 max Chloride (as Cl-)
ppm **0.0 max **0.0max pH (1% solution) 2.0 max 2.0 max Density
(*0°C)g/cm3 1.***1.*7 - Fe,mg/L *0.0 max 5.0 max Colour APHA
(Hazen) *0.0 max - Acetic acid % 0.5 max Ca sequestration (mg
CaCO3/g) **0.0 min 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 ***0mg/L is preferred as scale inhibitor,
****0mg/L as corrosion inhibitor, and ********0mg/L as detergent.
Usually, HEDP is used together with polycarboxylic acid. if you are
interested in it,welcome your *
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