5,5-二甲基-1,3-环己烷二酮和2-氨基苯酚衍生的席夫碱在1M HCl和0.5M H2SO4中对软钢的合成、循环伏安、电化学和重量缓蚀研究

IF 2.3 Q3 ELECTROCHEMISTRY International journal of electrochemistry Pub Date : 2019-05-02 DOI:10.1155/2019/1094148
Ragi Kooliyat, Joby Thomas Kakkassery, V. P. Raphael, Sini Varghese Cheruvathur, Binsi M. Paulson
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引用次数: 15

摘要

合成了席夫碱2,2'-(5,5-二甲基环己烷-1,3-二亚基)双(氮杂-1-基-1-亚基)二酚(DmChDp),并用光谱法(IR、UV、NMR和质谱)和循环伏安法(CV)对其进行了表征。研究了(DmChDp)在1M HCl和0.5M H2SO4中对软钢(MS)的缓蚀性能。用于此目的的腐蚀监测技术是重量法和电化学法(EIS和动电位极化研究)。研究表明,席夫碱DmChDp在1M盐酸中对软钢具有良好的缓蚀作用。在MS上,DmChDp在1M HCl和0.5M H2SO4中均服从Langmuir吸附等温线。极化研究表明,DmChDp在两种介质中都表现为混合型抑制剂。扫描电子显微镜分析证实了DmChDp对软钢表面的保护作用。采用重量法评价了温度对MS腐蚀的影响。
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Synthesis, Cyclic Voltammetric, Electrochemical, and Gravimetric Corrosion Inhibition Investigations of Schiff Base Derived from 5,5-Dimethyl-1,3-cyclohexanedione and 2-Aminophenol on Mild Steel in 1 M HCl and 0.5 M H2SO4
Schiff base 2,2’-(5,5-dimethylcyclohexane-1,3-diylidene)bis(azan-1-yl-1-ylidene) diphenol (DmChDp) was synthesized and characterized using spectroscopic methods (IR, UV, NMR, and Mass) and cyclic voltammetric (CV) studies. The corrosion inhibition potency of (DmChDp) on mild steel (MS) in 1M HCl and 0.5M H2SO4 was investigated. The corrosion monitoring techniques employed for this purpose are gravimetric and electrochemical methods (EIS and potentiodynamic polarization studies). The study reveals that the Schiff base, DmChDp, acts as excellent corrosion inhibitor on mild steel in 1M HCl. DmChDp obeys Langmuir adsorption isotherm both in 1M HCl and 0.5M H2SO4 on MS. Polarization studies show that DmChDp behaves as a mixed type inhibitor in both media. Scanning electron microscopic analysis established the protective nature of DmChDp on mild steel surface. The impact of temperature on the corrosion of MS was also evaluated using gravimetric method.
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