Spectrophotometric study of the corrosion behaviour of chromium in molten alkali carbonates

Chan Gyu Joo, Cheol Woo Yi, Cheolhwa Kang, Keon Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The corrosion of chromium species in molten (Li/K)2CO3 and (Li/Na/K)2CO3 are investigated by spectrophotometry. A strong charge-transfer absorption band is observed in the ultraviolet region with λmax = 372 nm, and the molar absorptivity of CrO2-4 in molten (Li/K)2CO3 is calculated. The corrosion rates are investigated by means of increasing the concentration of CrO2-4 in the melts. Under an air atmosphere, the corrosion rate is slower in molten (Li/K)2CO3 than in molten (Li/Na/K)2CO3 and Cr2O3 corrodes more easily in molten (Li/K)2CO3 than Cr. With an atmosphere of CO2 = 1 atm, there is no increase in the CrO2-4 concentration in the solution phase during a period of 5 h.

Original languageEnglish
Pages (from-to)211-214
Number of pages4
JournalJournal of Power Sources
Volume72
Issue number2
DOIs
Publication statusPublished - 1998 Apr 21

Keywords

  • Chromium
  • Corrosion
  • Molten carbonates
  • Spectrophotometry

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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