Adsorption and inhibition study of N-(5-methoxy-2-hydroxybenzylidene) isonicotinohydrazide Schiff base on copper corrosion in 3.5% NaCl

Q1 Earth and Planetary Sciences

Egyptian Journal of Petroleum Pub Date : 2022-06-01 DOI:10.1016/j.ejpe.2022.05.001

Cordelia U. Dueke‑Eze , Nancy A. Madueke , Nkem B. Iroha , Ngozi J. Maduelosi , Lebe A. Nnanna , Valentine C. Anadebe , Augustine A. Chokor

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引用次数: 15

Abstract

Corrosion inhibition ability of synthesized Schiff base namely, N-(5-methoxy-2-hydroxybenzylidene) isonicotinohydrazide (NMHI) on copper in 3.5% NaCl solution was studied via electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PP) and gravimetric study. Results showed NMHI to inhibit copper corrosion in chloride solution. The inhibition efficiency of NMHI was enhanced with an increase in the concentration but decreases with rising temperature. Maximum value of 97.7% inhibition efficiency was obtained with weight loss measurement at 303 K for the highest NMHI concentration (1 × 10^-3 M) used. Polarization studies indicated that NMHI acted as mixed kind of inhibitor. The Nyquist plot revealed that double-layer capacitance (C_dl) declined and charge-transfer resistance (R_ct) was enhanced with increase in NMHI concentrations, involving increased inhibition efficiency. NMHI adsorption onto the surface of copper obeyed Langmuir adsorption isotherm. Scanning electron microscopy (SEM) was used to characterize the morphology of uninhibited and inhibited copper surfaces.

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3.5% NaCl中N-(5-甲氧基-2-羟基苄基)异烟酰肼希夫碱对铜腐蚀的吸附与抑制研究

采用电化学阻抗谱(EIS)、动电位极化(PP)和重量法研究了合成席夫碱N-(5-甲氧基-2-羟基苄基)异烟碱肼(NMHI)在3.5% NaCl溶液中对铜的缓蚀能力。结果表明，NMHI对铜在氯化物溶液中的腐蚀有抑制作用。NMHI的抑菌效果随浓度的增加而增强，但随温度的升高而降低。当NMHI浓度最高(1 × 10-3 M)时，在303 K下进行失重测定，抑菌率达到97.7%。极化实验表明，NMHI是一种混合型抑制剂。Nyquist图显示，随着NMHI浓度的增加，双层电容(Cdl)下降，电荷转移电阻(Rct)增强，抑制效率提高。NMHI在铜表面的吸附服从Langmuir吸附等温线。利用扫描电镜(SEM)对未抑制和抑制的铜表面形貌进行了表征。

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来源期刊

Egyptian Journal of Petroleum Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

7.70

自引率

0.00%

发文量

审稿时长

84 days

期刊介绍： Egyptian Journal of Petroleum is addressed to the fields of crude oil, natural gas, energy and related subjects. Its objective is to serve as a forum for research and development covering the following areas: • Sedimentation and petroleum exploration. • Production. • Analysis and testing. • Chemistry and technology of petroleum and natural gas. • Refining and processing. • Catalysis. • Applications and petrochemicals. It also publishes original research papers and reviews in areas relating to synthetic fuels and lubricants - pollution - corrosion - alternate sources of energy - gasification, liquefaction and geology of coal - tar sands and oil shale - biomass as a source of renewable energy. To meet with these requirements the Egyptian Journal of Petroleum welcomes manuscripts and review papers reporting on the state-of-the-art in the aforementioned topics. The Egyptian Journal of Petroleum is also willing to publish the proceedings of petroleum and energy related conferences in a single volume form.