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

Chan G. Joo, Cheol W. Yi, Cheolhwa Kang, Keon Kim

Research output: Contribution to journalArticle

2 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
Publication statusPublished - 1998 Apr 21

Fingerprint

Carbonates
Alkalies
Chromium
Molten materials
chromium
alkalies
carbonates
corrosion
Corrosion
atmospheres
Corrosion rate
spectrophotometry
absorptivity
charge transfer
absorption spectra
Spectrophotometry
air
Charge transfer
Absorption spectra
Air

Keywords

  • Chromium
  • Corrosion
  • Molten carbonates
  • Spectrophotometry

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry

Cite this

Spectrophotometric study of the corrosion behaviour of chromium in molten alkali carbonates. / Joo, Chan G.; Yi, Cheol W.; Kang, Cheolhwa; Kim, Keon.

In: Journal of Power Sources, Vol. 72, No. 2, 21.04.1998, p. 211-214.

Research output: Contribution to journalArticle

Joo, Chan G. ; Yi, Cheol W. ; Kang, Cheolhwa ; Kim, Keon. / Spectrophotometric study of the corrosion behaviour of chromium in molten alkali carbonates. In: Journal of Power Sources. 1998 ; Vol. 72, No. 2. pp. 211-214.
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AB - 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.

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