Fe doped Ni–Co alloy by electroplating as protective coating for solid oxide fuel cell interconnect application.

To obtain higher electrical conductivity and lower area specific resistance (ASR), the 10% Fe doped Ni–Co (NCF) alloy was prepared on SUS 430 steel substrate by electroplating for solid oxide fuel cells (SOFCs) interconnects application. Then, the SUS 430 steels and NCF coated steels were oxidized at 800 °C. The microstructure and oxide phase of samples were tested by scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). These results proved that the NCF coated steel achieved the lower oxidation rate of 9.28 × 10−14 g2cm−4s−1 and ASR of 14.72 mΩ cm2. • Fe doped Ni–Co coatings were electroplated on SUS 430 stainless steel. • The multi-layers oxides were thermally converted from alloy coatings. • The growth of Cr 2 O 3 oxide layer was restrained. • The high electrical conductivity were exhibited. [ABSTRACT FROM AUTHOR]