期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 45, 期 55, 页码 30924-30931出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.08.038
关键词
Corrosion inhibition; Methanol; Bipolar plate; Direct formic acid fuel cell
资金
- National Natural Science Foundation of China [51962027, 21968022, 21868022]
- Natural Science Foundation of Inner Mongolia [2019BS02002]
- Project of Science Foundation of the Educational Department of Inner Mongolia [NJZY19135]
- Inner Mongolia University of Science and Technology Innovation Fund [2019QDL-B23]
The corrosion properties of AISI316L stainless steel (316 L SS) as bipolar plates are inves- tigated under aqueous acid methanol solutions (0.05 M H2SO4 + 2 ppm HF + 10 M HCOOH + x M CH3OH (x = 0, 3, 6 and 9) solutions at 70 degrees C) to simulate the varied anodic operating conditions of direct formic acid fuel cells (DFAFCs). When the methanol content is higher, the potentiodynamic, potentiostatic polarisation and EIS tests of the 316 L SS bipolar plates all show excellent corrosion resistance. The surface morphology and the glow discharge mass spectrometer (GDMS) illustrate that the surface corrosion on 316 L SS bipolar plates is slowed down when the methanol concentration is increased. These results indicate the methanol plays the role in retarding the corrosion rate of the 316 L SS in simulated DFAFCs anodic operating conditions by restricting the proton conductivity in the test solutions. The sample tested in higher content methanol solution has smoother corroded surface and thinner passivation film, which contributes to a lower interfacial contact resistances (ICR) value. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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