Development and characterization of corrosion resistant coatings using natural biopolymer chitosan

G. Kumar, R. G. Buchheit

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


In the present study, chitosan, a derivative of naturally abundant biopolymer chitin, was used as the basis for corrosion resistant coating. Chitosan suffers from two inherent weaknesses as a coating material namely its high hydrophilicity and its poor adhesive strength with Al 2024 13 alloy. In the present study, chitosan structure was modified using epoxy functional silane and vanadate. Performance of different coatings was tested using electrochemical impedance spectroscopy, adhesion testing and salt spray testing. The best salt spray performance was observed in case of chitosan-(3-Glycidoxypropyl)- trimethoxysilane-vanadate coatings, which lasted 450 hours in salt spray chamber without visible corrosion. UV/Visible spectroscopy measurements showed release of vanadate by chitosan increases with increasing solution pH. This property of chitosan provides self-healing characteristics to these coatings. When the solution pH is readjusted to a lower value, chitosan can readsorb released vanadate. FTIR spectra of chitosan gel showed adsorption of vanadate at protonated amine sites. Chitosan showed a maximum in the vanadate adsorption capacity in the pH 3 to 5 range. copyright The Electrochemical Society.

Original languageEnglish
Pages (from-to)101-117
Number of pages17
JournalECS Transactions
Issue number9
StatePublished - 2006
EventCorrosion Protective Coatings and Inhibitors - 208th Electrochemical Society Meeting - Los Angeles, CA, United States
Duration: Oct 16 2005Oct 21 2005

ASJC Scopus subject areas

  • General Engineering


Dive into the research topics of 'Development and characterization of corrosion resistant coatings using natural biopolymer chitosan'. Together they form a unique fingerprint.

Cite this