Electrodeposition of CoMn onto Stainless Steels Interconnects for Increased Lifetimes in SOFCs

Abstract

A pulse and pulse reverse electrochemical deposition process is being developed for cost effective coating of solid oxide fuel cell (SOFC) interconnects. Faraday Technology and WVU demonstrated that the developed process could produce uniform dense, crack-free, well-adhered CoMn alloy coatings of various compositions on up to a 10 cm x 10 cm 441 stainless steel interconnect surface. The performance of various CoMn coatings has been evaluated before and after long duration thermal soak (~2000 hr @ 850°C) to determine the potential of each coating to mitigate Cr diffusion. The data included herein demonstrates the coatings potential while also identifying several challenges that need to be overcome before a successful coating can be scalably produce. Finally, we demonstrate the scalability of the FARADAYICSM Process via dual sided deposition of CoMn onto 10 cm x 10 cm T441 substrates.