Huchuan Wang, Yuming Zhou, Guangqing Liu, Jingyi Huang, Qingzhao Yao, Shuaishuai Ma, Ke Cao, Yahui Liu, Yujie Tian, Wendao Wu, Wei Sun, Zhengjun Hu
May 1, 2013
The corrosion and scale inhibition properties of acrylic acid-oxalic acid-allylpolyethoxy carboxylate (AA-APEM9) were investigated by determining the corrosion and scale inhibition efficiency, the Tafel polarization curve and significant control of CaCO 3 scales. The AA-APEM9 exhibits the highest inhibition efficiency of 81.4 % when the carbon steel immersion in 3 % NaCl solution. AA-APEM9 possess excellent CaCO 3 inhibition, approximately 70.2 % at threshold dosage of 6 mg/L. Compared to T-225, HPMA, PAA, PESA, AA-APEM9, possessing PEG, shows a superior inhibitory efficiency. AA-APEM9 has the best inhibition because of possessing the greatest degree of polymerization of PEG among it. SEM and TEM images indicate that AA-APEM9 changes highly the morphology and size of CaCO 3 crystals during the inhibition process. XRD analysis shows that the AA-APEM9 copolymer influence CaCO 3 crystal crystallinity. AA-APEM9 may be a potentially useful corrosion and scale inhibitor in a cooling water system.