Graphene for corrosion protection of stainless steel bipolar plates for polymerelectrolyte membrane fuel cell

In this study, stainless steel with a nickel layer (Ni/SS) and composite of RGO and Ni coated on SS (G/Ni/SS). The Ni and graphene film, synthesized by electrochemical method in watts bath. The morphology of coated surfaces are studied by field emission scanning electron microscopy (FESEM) and Atomic-force microscopy (AFM). Here, we employ electrochemical measurements suchas linear polarization and electrochemical impedance spectroscopy measurements in 3.5% NaCl solution to study the corrosion inhibition of the sample. Finally, we use Tafel analysis to quantifythe corrosion rates of samples with and without coatings. Our results show that even non-perfectmultilayer graphene films can considerably increase the life time of future-generation bipolar plates for fuel cells.

کلیدواژه ها:

Linear polarization ، electrochemical impedance spectroscopy ، Graphene ، corrosionrates