Corrosion inhibition of mild steel in 0.5 M HCL by substituted 1,3,4-oxadiazole

Q1 Earth and Planetary Sciences
K. Raviprabha , Ramesh S. Bhat
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引用次数: 3

Abstract

Organic inhibitors are normally used to inhibit the corrosion of metals or alloys in an aqueous environment. The anti-corrosive property of 5((6-Methyl-2-oxo-2H-chromen-4yl)thiomethyl)-2((N-(3-methyl-quinoxalin-2(1H)one)yl) methyl)-1,3,4-oxadiazole (MOD) on mild steel (MS) was studied. Which acts as a novel corrosion inhibitor for MS in 0.5 M Hydrochloric acid (HCl) solution and corrosion behavior in the temperature range of 303–323 K, without and with the MOD inhibitor, was calculated using potentiodynamic polarization, electrochemical impedance spectroscopy, and weight loss measurements. The surface topography of mild steel with, and without MOD was investigated by Scanning electron microscopy (SEM) technique. The inhibitory efficiency increases with an increase in MOD (50 ppm) concentration and showed a maximum of 84.85% in 0.5 M HCl at 303 K. The variation in kinetic and thermodynamic properties of MOD on MS indicates chemisorption and its mixed kind of inhibition activity followed by the Langmuir adsorption isotherm. The experimental results are supported by Density functional theory (DFT) simulations, indicating a potential corrosion inhibition behaviour of MOD on MS in acidic environments. A suitable mechanism for the corrosion inhibition of mild steel was put forth. The corrosion inhibition mechanism of mild steel was discussed. Mild steel is a low-cost engineering material that can be regularly used for various applications such as construction, advertising, vehicles, furniture, fencing, and more in various conditions, including mild acidic ones with a little caution.

低碳钢在0.5中的缓蚀作用 取代1,3,4-恶二唑的M HCL
有机缓蚀剂通常用于抑制金属或合金在水环境中的腐蚀。研究了5((6-甲基-2-氧- 2h -铬-4基)硫甲基)-2((N-(3-甲基-喹啉-2(1H) 1)基)甲基)-1,3,4-恶二唑(MOD)对低碳钢(MS)的防腐性能。在0.5 M盐酸(HCl)溶液中,它作为一种新型的MS缓蚀剂,在303-323 K的温度范围内,使用动电位极化、电化学阻抗谱和失重测量方法计算了MOD缓蚀剂的腐蚀行为。采用扫描电镜(SEM)技术研究了含MOD和不含MOD的低碳钢的表面形貌。随着MOD(50 ppm)浓度的增加,抑制效率也随之增加,在0.5 M HCl(303 K)条件下,抑制效率最高,达到84.85%。MOD对MS的动力学和热力学性质的变化表明其具有化学吸附和混合抑制活性,然后是Langmuir吸附等温线。实验结果得到了密度泛函理论(DFT)模拟的支持,表明MOD在酸性环境中对MS具有潜在的缓蚀行为。提出了一种适用于低碳钢的缓蚀机理。探讨了低碳钢的缓蚀机理。低碳钢是一种低成本的工程材料,可以经常用于各种应用,如建筑、广告、车辆、家具、围栏等,在各种条件下,包括轻度酸性的条件下,要小心一点。
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来源期刊
Egyptian Journal of Petroleum
Egyptian Journal of Petroleum Earth and Planetary Sciences-Geochemistry and Petrology
CiteScore
7.70
自引率
0.00%
发文量
29
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.
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