Influence of thermomechanical post-treatment on the corrosion behavior of Ni57Nb33Zr5Co5 bulk metallic glass

被引：2
|
作者：
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 ]
机构：
[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
来源：
MATERIALS LETTERS | 2021年 / 288卷
基金：
巴西圣保罗研究基金会;
关键词：
Amorphous materials; Bulk metallic glass; Corrosion; Crystallization; Proton exchange membrane fuel cells; CU; TI;
D O I：
10.1016/j.matlet.2021.129350
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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.
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页数：4
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