Synthesis and Characterization of Oligomer Bis(trans-2,3-dibromo-4-hydroxy-2-butenyl)terephthalate as a Green Corrosion Inhibitor on Mild Steel in 1 M H3PO4 Solution

IF 1 Q4 CHEMISTRY, MULTIDISCIPLINARY

Indonesian Journal of Chemistry Pub Date : 2023-12-06 DOI:10.22146/ijc.84060

R. J. Tuama

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引用次数: 0

Abstract

Poly(ethylene terephthalate) (PET) waste was depolymerized by trans-2,3-dibromo-2-butene-1,4-diol in the presence of manganese acetate as a catalyst using microwave irradiation as opposed to the conventional heating process in order to reduce the time required for PET depolymerization. The depolymerization product bis(trans-2,3-dibromo-4-hydroxy-2-butenyl)terephthalate (BDBHBT) was isolated, characterized, and evaluated as a green inhibitor for mild corrosion steel in corrosive 1 M H3PO4 medium. This product was characterized using FTIR and 1H-NMR. The effects of immersion time, inhibitor concentration, and reaction temperature were studied. The chemical technique utilized in this study was weight loss, while the electrochemical technique employed an open circuit potential. With 0.6 g/L of BDBHBT inhibitor, the highest corrosion inhibition efficiency of 83.3% was observed. The kinetic and thermodynamic functions were calculated, and the results indicated that the investigated inhibitor was physically adsorbed on the surface and confirmed to the Langmuir adsorption isotherm. This study aims to lessen pollution of the environment by transforming PET waste to a beneficial oligomer BDBHBT and estimating the inhibitory effect of this product on the corrosion of mild steel in 1 M H3PO4.

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作为 1 M H3PO4 溶液中低碳钢绿色缓蚀剂的对苯二甲酸二（反式-2,3-二溴-4-羟基-2-丁烯基）低聚物的合成与表征

在醋酸锰作为催化剂存在的情况下，使用微波辐照而不是传统的加热工艺，用反式-2,3-二溴-2-丁烯-1,4-二醇解聚聚对苯二甲酸乙二酯（PET）废料，以缩短 PET 解聚所需的时间。分离出了解聚产物双（反式-2,3-二溴-4-羟基-2-丁烯基）对苯二甲酸酯（BDBHBT），对其进行了表征，并将其评估为在腐蚀性 1 M H3PO4 介质中用于轻度腐蚀钢的绿色抑制剂。利用傅立叶变换红外光谱和 1H-NMR 对该产品进行了表征。研究了浸泡时间、抑制剂浓度和反应温度的影响。本研究采用的化学技术是失重法，而电化学技术采用的是开路电位法。在使用 0.6 g/L 的 BDBHBT 抑制剂时，缓蚀效率最高，达到 83.3%。对动力学和热力学函数进行了计算，结果表明所研究的抑制剂被物理吸附在表面，并证实了 Langmuir 吸附等温线。本研究旨在通过将 PET 废弃物转化为有益的低聚物 BDBHBT，并评估该产品在 1 M H3PO4 中对低碳钢腐蚀的抑制作用，从而减少对环境的污染。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Indonesian Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

2.30

自引率

11.10%

发文量

106

审稿时长

15 weeks

期刊介绍： Indonesian Journal of Chemistry is a peer-reviewed, open access journal that publishes original research articles, review articles, as well as short communication in all areas of chemistry, including educational chemistry, applied chemistry, and chemical engineering.