Corrosion resistance of poly p-phenylenediamine conducting polymer coated 316L SS bipolar plates for Proton Exchange Membrane Fuel Cells

Poly(m‐phenylenediamine)‐coated 316L SS: A promising material for bipolar plates in PEMFC environment

“…Further electropolymerization proceeds through successive electrochemical and chemical steps. The onset of polymerization was confirmed by running a CV without monomer and the findings were reported elsewhere by the authors . Different peak pattern was observed in the presence of monomer indicating predominant oxidation of monomer and its subsequent polymerization over oxygen evolution.…”

“…The WE potential was cycled from 0.4 to 1.4 V SCE at a scan rate of 0.05 V/s for 20 cycles. Sodium malonate was used as the supporting electrolyte and its concentration was fixed at 0.15 M. The m PD monomer concentration was varied at 0.02, 0.04, and 0.06 M. All the solutions were prepared using double‐distilled water. The electrodes were removed from the cell after the completion of the electropolymerzation process and rinsed with double‐distilled water to remove any unreacted monomer molecules before being dried.…”

“…Many conducting polymers have been synthesized and tried for corrosion protection purpose in fuel cells. Poly( o ‐phenylenediamine), polyaniline, polypyrrole, poly( p ‐phenylenediamine) have already been investigated on stainless steel and aluminum alloys. Since poly( m ‐phenylenediamine) (P m PD) is also a conducting polymer, its applicability in providing corrosion protection to 316L SS has been investigated in this study.…”

Electro Polymerization of Polypyrrole Coatings Doped with Different Proton Acids for Corrosion Protection of 304 Stainless Steel

“…Stainless steel (SS) becomes one of the most suitable metallic materials for industrial applications in the contemporary society due to the advantages of decent conductivity, high mechanical strength, low gas permeability and reasonable cost [1,2]. However, the main problem associated with SS is to resist corrosion in the aggressive medium [2,3].…”

“…However, the main problem associated with SS is to resist corrosion in the aggressive medium [2,3]. The occurrence of corrosion not only brings large economic loss, the dissolution of SS also leads to harmful metallic ions (Cr, Fe, Ni et al) release out, which undoubtedly contributes to the environmental pollution.…”