What is Hydrolyzed Polymaleic Anhydride used for?

HPMA is usually used together with organic phosphonate at dosage of 1-15ppm for circulating cool water system, oilfield fill water, crude oil dewatering and low-pressure boilers. HPMA has good scale inhibition (98%) and scale stripping properties. When used together with zinc salts, Hydrolyzed Polymaleic Anhydride can effectively inhibit carbon steel corrosion.

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