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Hydrolyzed polymaleic anhydride is typically complexed with organic phosphonates at 1-15 ppm. It is used for circulating cooling water, oil field water injection, crude oil dehydration treatment and low-pressure boiler furnace treatment. It has a good effect of inhibiting the formation of scale and peeling off old scale. up to 98%. When HPMA is compounded with zinc salt, it can effectively prevent the corrosion of carbon steel.
