Boronization of nickel and nickel clad materials for potential use in polymer electrolyte membrane fuel cells
A new low-cost, nickel clad bipolar plate concept is currently being developed for use in polymer electrolyte membrane fuel cells. Reported in this paper are the details of a powder-pack boronization process that would be used to establish a passivation layer on the electrolyte exposed surfaces of the bipolar plate in the final stage of manufacture. Results from energy dispersive X-ray analysis, X-ray diffraction, and scanning electron microscopy indicate that under moderate boronization conditions a homogeneous Ni3B layer grows on the exposed surfaces of the nickel clad material, the thickness of which depends on the time and temperature of boronization according to a Wagner-type scale growth relationship. At higher temperatures and longer reaction times, a Ni2B overlayer forms on top of the Ni3B during boronization.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 898639
- Report Number(s):
- PNNL-SA-49727; HI0300000; TRN: US200706%%245
- Journal Information:
- Surface & Coatings Technology, 201(7):4436-4441, Journal Name: Surface & Coatings Technology, 201(7):4436-4441
- Country of Publication:
- United States
- Language:
- English
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