performance
Scale and Corrosion Inhibitor (ethylene diamine tetra methylene phosphonic sodium EDTMPS shows better) is the polyphosphonic nitrogenous organic acid, a part of cathodic corrosion inhibitor, compared with inorganic polyphosphate, inhibition rate of 3 to 5 times. Miscible with water, toxic pollution, chemical stability and thermal tolerance, there is still a good scale inhibition at 200 ℃. EDTMPS dissociation in aqueous solution can be eight positive and negative ions, which can together with many metal ions chelate to form a multiple polymer reticulation complex, loosely dispersed in water to destroy the normal crystallization of calcium scale. EDTMPS effect of calcium sulfate, barium sulfate antiscale.
Second, the quality indicators
The HG / T 3538-2003
Item Index
Appearance: yellow brown transparent liquid
Active component (to EDTMPS)% ≥ 30.0
Organic phosphine (PO43-meter)% ≥ 10.0
Phosphorous acid (as PO33-meter)% ≤ 5.0
Phosphate (PO43-meter)% ≤ 1.0
PH (1% aqueous solution) 9.5-10.5
Density (20 ℃) 朠/cm3, ≥ 1.25
Chloride (Cl-meter)% ≤ 3.0
Third, the scope of application and use
EDTMPS used for circulating water and boiler water, corrosion inhibitors, complexing agent cyanide electroplating, textile printing and dyeing industries chelating agents and oxygen bleaching stabilizer. In the circulating cooling water is used alone, the typical doses of ~ 10mg / L,. Compound EDTMPS with HPMA ratio of 1:3 can be used for low pressure boiler. EDTMPS with the BTA, (PAAS), zinc salts, such as mixed use. 200g per ton of water plus the ratio of agents to join the boiler supplemental water can be used to pay attention to the sewage requirements of hourly sewage once, every 5 to 10 seconds, such as boiler with dirt running can increase the amount of reagent, ground sewage, run 10 20 days after the shutdown, manual clean up off the scale, to prevent dirt from clogging the pipeline, and then transferred to normal operation. Conditional boiler water of concentration can be measured and controlled at about 10 times, other parameters according to the relevant provisions of the adjustment of the labor department (such as boiler water pH10 is ~ 12, etc.). Dosing tank is plastic, the pool of the cement material should be treated with preservatives, otherwise easily eroded by the pharmacy, so that an increase in water hardness. Boiler added to the total hardness of water should be controlled at less than 200 mg / L, if the hardness is too high availability lime method or other methods to reduce the hardness or Boiler Scale and Corrosion Inhibitor, TH-503 scale effect will be affected.
