... with average molecular weight 400-800. No toxicity, soluble in water, high chemical and thermal stability, decomposed temperature above 330°C ... (350°C) and high pH(8.3)level, suitable to be used in alkaline water system or built with agents. It has ... , crude oil evaporation, petroleum pipeline, and industrial circulating cool water systems. In addition, HPMA has good corrosion inhibition effect when ...