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Circulating Cooling Water treatment System
YUSI--2075 SERIES
	YUSI--20752
	YUSI--20754
	YUSI--20756
	YUSI--20759
YUSI--2076 SERIES
	YUSI--20769
	YUSI--207612
	YUSI--207662
	YUSI--2076111
	YUSI--2076561

       YUSI—2076 SERIES

                    —Organophosphonic Acid

　
                              Organophosphonic Acid water treatment chemicals are the new type of scale inhibitors and corrosion inhibitors developed in the end of the 1960's. Possesses excellent threshold property. Minute amounts of Organophosphonic Acid adsorb on nuclei sites and hundreds times of scale crystallite growth can be inhibited. 
    Because of the effectiveness of Organophosphonic Acid series is based not only on their ability to prevent the formation of alkaline scale and non-alkaline scale in water, but also ,and this is particularly important, on their ability to effect inhibition in substoichiometric amounts--threshold effect. Therefore, Organophosphonic Acid are widely employed to inhibit scale formation in industry circulating and closed water supply system, oil-field water system including connate brine or injection fluid co-exist with oil in primary and secondary recovery processes of oil well.
    When the concentration of Organophosphonic Acid , in pH 6.5-7 water solution , increased up to 30 milligrams per litter, it can be combined with calcium cation to form an anticorrosion deposited film on steel surface, especially, when it is mixed with zinc.
    Zinc -Organophosphonic Acid mixtures provide an effective protection on steel and copper over a wide pH range at lower concentration.
    In the middle stage of 1970s, research and development of Organophosphonic Acid has been started in China. 
    A series of multiple aspects, wide-ranging, thorough research from practice to theory, from synthesize to production, from molecular structure to applied performance of Organophosphonic Acid especially of Nitrilotrimethylenephosphonic Acid and of its derivatives, has been done by Prof. Li shouchun . It makes an important guiding meanings to utilize it in water chemical treatment systems.

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