Electrochemical Studies of Corrosion in Liquid Electrolytes for Energy Conversion Applications at Elevated Temperatures

Aleksey Valerievich Nikiforov, Irina Petrushina, Niels J. Bjerrum

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Abstract

Stainless steels (AISI 316, 321 and 347), high-nickel alloys (Hasteloy®C-276 and Inconel®625), tantalum, nickel, titanium, tungsten, molybdenum, niobium, platinum, and gold were tested for corrosion resistance in molten KH2PO4 (or KH2PO4-K2H2P2O7) as a promising electrolyte for the intermediate-temperature (200–400°C) water electrolysis. Pt, Ta, Nb, Ti, Inconel®625, and Ni demonstrated high corrosion resistance. Au and the rest of the tested materials were not corrosion resistant. It means that Ni, Ti and Inconel®625 may be used as relatively cheap construction materials for the intermediate-temperature water electrolyzer.
Original languageEnglish
Title of host publicationHigh Temperature Corrosion
EditorsZaki Ahmad
PublisherInTechOpen
Publication date2016
Pages89-100
Chapter5
ISBN (Print)978-953-51-2507-5
ISBN (Electronic)978-953-51-2508-2
DOIs
Publication statusPublished - 2016

Bibliographical note

Published: September 7, 2016 under CC BY 3.0 license. © The Author(s).

Keywords

  • Intermediate-temperature electrolysis
  • Bipolar plate
  • Nickel stability
  • Corrosion
  • Oxygen evolution
  • Molten salts

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