Coated stainless steels evaluation for bipolar plates in PEM water electrolysis conditions

Nuria Rojas, Margarita Sánchez-Molina, Gema Sevilla, Ernesto Amores, Eluxka Almandoz, Joseba Esparza, Marlon R. Cruz Vivas, Carles Colominas

Research output: Indexed journal article Articlepeer-review

52 Citations (Scopus)


Proton exchange membrane water electrolysis (PEMWE) is a promising technology to be incorporated in the production of green hydrogen, but one of its limitation to market penetration is the cost of bipolar plates (BPP). Aiming to reduce the cost of PEMWE stack, different surface engineered coating systems based on CrN/TiN, Ti/TiN, Ti and TiN deposited by physical vapor deposition on SS 316L, SS 904L and SS 321 were tested, as potential cost effective solutions to be implemented on bipolar plates. A corrosion evaluation has been carried out in anodic PEMWE conditions in order to determine the best substrate/coating combination for bipolar plates. Ti/TiN multi-layered coating on SS 321 shown the best performance with −0.02% weight loss, current at 2 VSHE to 436 μA cm−2 and ICR after corrosion test to 9.9 mΩ cm2.

Original languageEnglish
Pages (from-to)25929-25943
Number of pages15
JournalInternational Journal of Hydrogen Energy
Issue number51
Publication statusPublished - 26 Jul 2021
Externally publishedYes


  • Bipolar plates
  • Corrosion
  • Interfacial contact resistance
  • Physical vapor deposition
  • Water electrolysis


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