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Corrosion Inhibitor HEDP 2809-21-4

China

200 ~ 350 / Metric Ton أحصل على آخر سعر

-

1 Metric Ton

HEDP solid: 25kg/bag, customers’ requirement.

3-7 days

2000 Metric Ton per Month

T/T, L/C, PayPal

الاتصال الآن

الوصف

1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 
(HEDP)

CAS No.  2809-21-4
Molecular Formula:   C2H8O7P2                Molecular weight: 206.02
Structural Formula:
 

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. HEDPshows 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.

Specification:

Items Index
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content (HEDP)% 60.0 min 90.0 min
Active content (HEDP·H2O)% - 98.0 min
Phosphorous acid (as PO33-)% 1.0 max 0.8 max
Phosphoric acid  (as PO43- )% 0.6 max 0.5 max
Chloride (as Cl-)% 0.01 max 0.01 max
pH (1% water solution) 2.0 max 2.0 max
Density  (20℃)g/cm3 1.40 min -
Fe, mg/L 10.0 max 5.0 max
Colour APHA (Hazen) 10.0 max -
Ca sequestration (mg CaCO3/g) 500.0 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 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.

Package and Storage:

HEDP liquid: 200L plastic drum,IBC(1000L),customers requirement.
HEDP solid: 25kg/bag,customers requirement.
Storage for twelve months in room shady and dry place.
Synonyms:

HEDP;HEDP(A);HEDPA;

 

اتصل بنا

الشخص الذي يمكن الاتصال به: Matthew

الشركة:Shouguang Starail Economic and Trade Co., LTD

عنوان:Weifang, Shandong,

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إلى,

Matthew < Shouguang Starail Economic and Trade Co., LTD >
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