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Synthesis of polyaspartic acid/3-amino-1H-1,2,4-triazole-5-carboxylic acid hydrate graft copolymer and evaluation of its corrosion inhibition and scale inhibition performance

Ben Zhang,Dapeng Zhou,Xiaogai Lv,Ying Xu,Yuanchen Cui

A novel scale and corrosion inhibitor , polyaspartic acid/3-amino-1H-1,2,4-triazole-5-carboxylic acid hydrate graft copolymer was synthesized by maleic anhydride , urea and 3-amino-1H-1,2,4-triazole-5-carboxylic acid hydrate. The graft copolymer possesses good corrosion inhibition properties and outstanding scale inhibition performance for CaCO 3 , Ca 3 (PO 4 ) and CaSO 4 in the simulation experiment. The inhibition efficiency of graft copolymer is close to 100% for Ca 3 (PO 4 ) scale, polyaspartic acid (PASP) and only 22% when inhibitor concentration is 12   mg/L. Moreover, the inhibition corrosion efficiency can reach up to 75%, with PASP just 45% when inhibitor concentration is 16   mg/L.