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Conducting polymer/bio-material composite coatings for corrosion protection

IR@NPL: CSIR-National Physical Laboratory, New Delhi


Field	Value

Title	Conducting polymer/bio-material composite coatings for corrosion protection

Creator	Sambyal, Pradeep Ruhi, Gazala Mishra, Monu Gupta, Govind Dhawan, Sundeep K.

Subject	Materials Science Metallurgy & Metallurgical Engineering

Description	Present study demonstrates a facile in situ oxidative copolymerization method to synthesize conducting copolymer composites in aqueous chitosan medium. The development of poly(aniline-co-o-toluidine)-chitosan-SiO2/epoxy composite coatings were carried out by thermal curing of the spray-coated mild steel substrates. FT-IR analysis, XRD studies, SEM and HR-TEM evidenced that the composite has synergistically integrated properties of the copolymer and the SiO2 nanoparticles. The electrochemical analyses of the coatings in 3.5% NaCl solution manifest an efficient role of copolymer composite in the remarkable improvement of the corrosion resistance of the substrate. The analyses involve Tafel polarization and electrochemical impedance spectroscopy (EIS) studies. The corrosion inhibition property of conducting copolymers, the film forming ability of chitosan, and robustness of SiO2 nanoparticles kept the corrosion rate of the coatings significantly low, under highly corrosive conditions. Mild steel coated with 3.0% loading of copolymer composite coating demonstrated very low corrosion current density (i(corr)) and significantly high pore resistance (R-pore).

Publisher	Wiley

Date	2018-03

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://npl.csircentral.net/3877/1/Conducting%20polymer.pdf Sambyal, Pradeep and Ruhi, Gazala and Mishra, Monu and Gupta, Govind and Dhawan, Sundeep K. (2018) Conducting polymer/bio-material composite coatings for corrosion protection. Materials and Corrosion / Werkstoffe und Korrosion, 69 (3). pp. 402-417. ISSN 0947-5117

Relation	http://npl.csircentral.net/3877/