The effect of electrodeposited PANI on corrosion behavior of 316 stainless steel coated by CVD grown MWCNTs under PEMFC bipolar plate working condition

Mazdak Hashempour, Surbhi Sharma, Daniel Gonzalez, Antonello Vicenzo, Massimiliano Bestetti

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Polyaniline (PANI) electrodeposition on bare and carbon nanotube (CNT) coated 316 SS was carried out using a cyclic voltammetry (CV) electropolymerization method in diluted H2SO4 media containing aniline monomer. CNTs were grown in a thermal CVD reactor on 316 SS either by direct growth using ethylene precursor or by continuous feeding of an external catalyst, ferrocene, dissolved in toluene as the carbon precursor. Corrosion behavior of the coated materials was assessed by potentiodynamic and potentiostatic methods in an attempt to simulate the working conditions of proton exchange membrane fuel cell (PEMFC) bipolar plates. While a thick PANI coating could not provide a protective barrier to either bare or CNT coated 316 SS samples, a sensible improvement in corrosion resistance was revealed in the presence of a thin PANI layer. However, the protective capability of the PANI thin film was still inadequate for the purpose of providing reasonable corrosion resistance to the material under simulated PEMFC conditions, due to severe deterioration of CNT coated 316 SS caused by the initial carbon treatment.

Original languageEnglish
Pages (from-to)261-276
Number of pages16
JournalECS Transactions
Volume63
Issue number1
DOIs
Publication statusPublished - 2014
Externally publishedYes
Event15th International Conference on Advanced Batteries, Accumulators and Fuel Cells, ABAF 2014 - Brno, Czech Republic
Duration: 24 Aug 201428 Aug 2014

ASJC Scopus subject areas

  • Engineering(all)

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