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

HEDP is one kind of highly effective organic phosphorus class anti- isfilthy corrosion inhibitor. Under the high temperature, the high pH valuecondition is stable. HEDP duplicate matches the effect with otherwater treatment medicament to be ideal.

HEDP is one kind of organic phosphine acids anti- is filthy corrosion inhibitor.HEDP can with the iron, the copper, the zinc and so on the many kindsof metallic ion form the stable metallic ion complex compound,therefore has the anti- filthy ability. HEDP not only may take theanti- filthy medicinal preparation, moreover also can dissolve themetal surface the oxide compound, has the certain slow eclipsefunction.HEDP in 250 under can play the good slow eclipse anti- filthyrole, under high pH value still very stable, not the easy hydrolisis,under the common light hot condition not to be easy to decompose. TheHEDP acidproof alkalinity, bears the chlorine oxidation susceptibilityto compare other organic phosphine acids (salt) to be good. HEDP maywith the water in the metallic ion, the calcium ion form six ringschelates in particular, thus a better anti- filthy effect and obviousdissolve limits the effect, when HEDP and gathers the carboxylic acidprofile resistance filthy dispersing agent compound use, displays theideal coordination effect.

HEDP widely applies to industry recirculated cooling water system andso on the electric power, chemical industry, metallurgy, chemicalfertilizer and center, the low-pressure boiler, the oil field pourswater and the oil line, takes the anti- filthy medicinal preparationgentle etching reagent; HEDP in Textile industry, may make the metal andthe nonmetallic cleansing agent,  cyanide-less electroplating industry complexingagent. HEDP makes anti- filthy medicinal preparation general usedensity 1~10mg/L, makes corrosion inhibitor general use density 10~50-mg/L;Makes cleansing agent general use density 1000~2000mg/L; HEDP usuallywith gathers the carboxylic acid profile resistance filthy dispersingagent coordination use.