| Full text | |
| Author(s): |
Figueira, G.
[1, 2]
;
Dulnee, S.
[1]
;
Koga, G. Y.
[1]
;
Cataldi, T. P.
[1]
;
Kiminami, C. S.
[1]
;
Kaufman, M. J.
[3]
;
Gargarella, P.
[1, 2]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Mat Engn, Rodovia Washington Luis, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn, Rodovia Washington Luis, Km 235 SP-310, BR-13565905 Sao Carlos, SP - Brazil
[3] Colorado Sch Mines, Dept Met & Mat Engn, Golden, CO 80401 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Materials Letters; v. 288, APR 1 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
Thermomechanical post-treatments effect on the corrosion behavior of the bulk metallic Ni57Nb33Zr5Co5 glass in simulated Proton Exchange Membrane Fuel Cells (PEMFCs) environment was evaluated. Polarization tests revealed low corrosion current density (10(-8) A/cm(2)) and a wide passivation plateau of the amorphous alloy. The excellent properties (high resistance and low capacitance) ascribed to the passive film were assessed by electrochemical impedance spectroscopy. Thermomechanical posttreatments of the 1-mm-thick samples lead to partial crystallization of the Ni57Nb33Zr5Co5 alloy, as evidenced by differential calorimetry scanning and X-ray diffraction. While the crystallization resulted in loss in the corrosion properties, the post-treated Ni57Nb33Zr5Co5 samples still met the requirements for PEMFCs and exhibited better performance than conventional alloys (316L stainless steel and Inconel 625). (C) 2021 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys |
| Grantee: | Claudio Shyinti Kiminami |
| Support Opportunities: | Research Projects - Thematic Grants |