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Synthesis and characterization of scale and corrosion inhibitors with hyper-branched Structure and its mechanism

Abstract

A new type of the scale and corrosion inhibitors with hyper-branched structure has been developed in this study to improve the scale and corrosion inhibition efficiency of existing scale inhibitors for industrial water.The terminal amino phosphate group of hyper-branched Polymer(HBPs) was synthesized through Michael addition reaction and amidation reaction.The scale inhibition efficiency of the obtained products was determined according to their resistance to the crystalization of calcium sulfate and calcium carbonate at the optimal application conditions.The experimental results show that the HBPs provides a scale inhibiting efficiency for CaCO3 and CaSO4 as high as 96.7% and 93.9%, respectively. In addition, the HBPs inhibition effect on A3 carbon steel corrosion in 3wt% NaCl medium was investigated using weight loss and electrochemical measurements,polarization measurements indicated that the prepared HBPs acts as cathodic type inhibitor,the inhibition efficiency depends on its concentration and reaches 91.3% at 100mg/L. The SEM and XRD analysis showed that the good scale inhibition of HBPs is attributed to their inhibiting and destroying the formation of crystals,the crystal forms of calcium scale was changed. The study of adsorption thermodynamics,reaction kinetics of the corrosion process and the SEM analysis showed that the good corrosion inhibition of HBPs is derived from the carbon steel surface immersed in solution with HBPs which can induce the formation of dense protective adsorption film layer, these film layer will prevent the corrosion solution reaction with carbon steel surface. This conclusion indicates that the prepared HBPs have great potential in its application for the treatment of industrial water.

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Publication details

The article was received on 29 Jun 2017, accepted on 04 Sep 2017 and first published on 05 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02201H
Citation: New J. Chem., 2017, Accepted Manuscript
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    Synthesis and characterization of scale and corrosion inhibitors with hyper-branched Structure and its mechanism

    H. Huang, Q. Yao, B. Liu, H. Chen and N. Shan, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ02201H

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