Synthesis, Characterization and Corrosion Inhibition Performance of Glycine-Functionalized Graphene/Fe 3 O 4 Nanocomposi
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RESEARCH ARTICLE-CHEMISTRY
Synthesis, Characterization and Corrosion Inhibition Performance of Glycine-Functionalized Graphene/Fe3 O4 Nanocomposite (Gr/Fe@Gly NC) for Mild Steel Corrosion in 1 M HCl R. Aslam1 · M. Mobin1 · M. Shoeb1 · M. Parveen1 · S. Zehra1 · J. Aslam2 Received: 10 May 2020 / Accepted: 4 October 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract We have synthesized a ternary glycine-functionalized graphene/Fe3 O4 nanocomposite referred as Gr/Fe@Gly NC which was characterized by fourier transform infrared spectroscopy analysis (FT-IR), X-ray diffraction, high-resolution scanning electron microscopy/energy-dispersive X-ray spectroscopy (HR-SEM/EDS) and the transmission electron microscopy. The effectiveness of synthesized nanocomposite as anticorrosive material for mild steel in the acid medium was assessed using weight loss, electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) complemented with FT-IR and SEM studies. The results of weight loss study depicted its effectiveness and stability up to 60 °C at very low concentrations. FT-IR and SEM studies supported the existence of a protective film on the inhibited steel surface. The adsorption followed the Langmuir adsorption isotherm; as such, it approximated and defined the thermodynamic and kinetic parameters governing the adsorption process. ANOVA statistical check confirmed that there is statistically no significant difference between the inhibition efficiencies obtained through weight loss, PDP and EIS techniques. Keywords Nanocomposite synthesis · Acid corrosion · Inhibition · Graphene–Fe3 O4 @glycine nanocomposite
1 Introduction Metal corrosion protection is essential to ensure valuable part and longevity of the device, thus avoiding economic losses, devastating accidents caused by corrosion and the negative environmental impacts. Mild steel (having a carbon content up to 0.3%) has high mechanical properties, is relatively inexpensive and is used in many industrial applications [1, 2]. However, mild steel is prone to undergo corrosion which is triggered by many environmental factors like moisture, oxygen and electrolyte [3]. A well-established strategy for corrosion protection is the use of corrosion inhibitors in corrosive conditions. However, the toxicity of most of the corrosion inhibitors discharged into the environment posed a serious threat to the health and the environment.
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M. Mobin [email protected]
1
Corrosion Research Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India
2
Department of Chemistry, College of Science, Taibah University, Yanbu, Al-Madina 30799, Saudi Arabia
Scientists and engineers have been researching alternative sources of corrosion inhibitors to develop environmentally friendly goods that can achieve maximum efficiency and reduce effects on nature and humanity [3]. Nanotechnology has played a crucial role in the development of innovative technological advances to control steel
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