Enhancement of corrosion protection of mild steel by chitosan/ZnO nanoparticle composite membranes |
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| Affiliation: | 1. Department of Marine Science and Fisheries, Sultan Qaboos University, 123 Al-Khodh, Oman;2. Center of Excellence in Marine Biotechnology, Sultan Qaboos University, 123 Al-Khodh, Oman;3. Functional Materials Division, Materials and Nano Physics Department, ICT School, KTH Royal Institute of Technology, SE-164 40 Kista, Stockholm, Sweden |
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| Abstract: | The development of active corrosion protection systems for metallic substrates is an issue of prime importance for many industrial applications. Nanostructured chitosan/ZnO nanoparticle films were coated on mild steel by sol–gel process, dip coating technique. Sol–gel protective coatings have shown excellent chemical stability, oxidation control and enhanced corrosion resistance for metal substrates. Further, the sol–gel method is an environmentally friendly technique of surface protection which has traditionally been used for increasing corrosion resistance of metals. Films so formed were characterized by UV–vis absorption spectroscopy (UV–vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray fluorescence spectrometry (EDX). Corrosion protection behavior of these coated mild steel substrates in 0.1 N HCl solutions was evaluated by potentiodynamic polarisation studies (Tafel), linear polarisation studies (LPR), electrochemical impedance spectroscopy studies (EIS). |
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| Keywords: | Mild steel XRD SEM-EDS Electrochemical measurements |
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