CrCx coatings (where x = 5 ~ 35 sccm is the acetylene flux) were deposited on stainless steel 316L substrates using radio frequency unbalanced magnetron sputtering. The CrC35 coating showed the highest C-sp2 content and H/E ratio of all the coatings, and thus exhibited the lowest friction coefficient and wear rate. However, the CrC25 coating showed the best anti-corrosion performance in 0.5 M H2SO4 solution due to its low surface roughness and small cluster size. The electrochemical properties of the CrC25 coating were investigated in a simulated Proton Exchange Membrane Fuel Cell (PEMFC) environment with hydrogen and oxygen purging. The coating showed a low corrosion current density in both the anode and the cathode environments. Finally, the CrC35 coating showed the lowest interfacial contact resistance (ICR) of the various coatings under a compaction force of 140 Ncm−2 due to its high C-sp2 content.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering