The phase, mechanical properties, corrosion resistance, hydrophobicity, and interfacial contact resistance of Hastelloy X were investigated to evaluate its performance in proton exchange membrane fuel cells (PEMFCs). For comparison, the corresponding performance of 304 stainless steel (304SS) was also tested. Hastelloy X exhibited a single-phase face-centered cubic structure with a yield strength of 445.5 MPa and a hardness of 262.7 HV. Both Hastelloy X and 304SS exhibited poor hydrophobicity because the water contact angles were all below 80°. In a simulated PEMFC working environment (0.5 M HSO + 2 ppm HF, 80 °C, H), Hastelloy X exhibited better corrosion resistance than 304SS. At 140 N·cm, the interfacial contact resistance of Hastelloy X can reach as low as 7.4 mΩ·cm. Considering its overall performance, Hastelloy X has better potential application than 304SS as bipolar plate material in PEMFCs.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10974393 | PMC |
http://dx.doi.org/10.3390/molecules29061299 | DOI Listing |
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