Enhancement of corrosion protection of mild steel by chitosan/ZnO nanoparticle composite membranes

•Chitosan/ZnO nanoparticles were coated on mild steel by sol–gel process.•Corrosion inhibition can be effectively analyzed by IS and potentiodynamic polarization methods.•The morphology of the Chitosan/ZnO nanoparticles was analyzed. The development of active corrosion protection systems for metalli...

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Bibliographic Details
Published inProgress in organic coatings Vol. 84; pp. 28 - 34
Main Authors John, Sam, Joseph, Abraham, Jose, Ajith James, Narayana, B.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2015
Subjects
Carbon steels
Corrosion prevention
Corrosion resistance
Electrochemical impedance spectroscopy
Electrochemical measurements
Mild steel
Nanostructure
Protective coatings
SEM-EDS
Sol gel process
Substrates
XRD
Electrochemical measurements
Mild steel
XRD
SEM-EDS
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Summary:•Chitosan/ZnO nanoparticles were coated on mild steel by sol–gel process.•Corrosion inhibition can be effectively analyzed by IS and potentiodynamic polarization methods.•The morphology of the Chitosan/ZnO nanoparticles was analyzed. 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 0.1N HCl solutions was evaluated by potentiodynamic polarisation studies (Tafel), linear polarisation studies (LPR), electrochemical impedance spectroscopy studies (EIS).
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ISSN:0300-9440
1873-331X
DOI:10.1016/j.porgcoat.2015.02.005