Spectrophotometric study of the corrosion behaviour of chromium in molten alkali carbonates
| Autor: | Cheol Woo Yi, Cheolhwa Kang, Chan Gyu Joo, Keon Kim |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
medicine.diagnostic_test
Renewable Energy Sustainability and the Environment Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element Molar absorptivity Alkali metal Corrosion Potassium carbonate chemistry.chemical_compound Chromium chemistry Absorption band Spectrophotometry medicine Electrical and Electronic Engineering Physical and Theoretical Chemistry Sodium carbonate |
| Zdroj: | Journal of Power Sources. 72:211-214 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/s0378-7753(97)02688-8 |
| Popis: | The corrosion of chromium species in molten (Li/K) 2 CO 3 and (Li/Na/K) 2 CO 3 are investigated by spectrophotometry. A strong charge-transfer absorption band is observed in the ultraviolet region with λ max =372 nm, and the molar absorptivity of CrO 4 2− in molten (Li/K) 2 CO 3 is calculated. The corrosion rates are investigated by means of increasing the concentration of CrO 4 2− in the melts. Under an air atmosphere, the corrosion rate is slower in molten (Li/K) 2 CO 3 than in molten (Li/Na/K) 2 CO 3 and Cr 2 O 3 corrodes more easily in molten (Li/K) 2 CO 3 than Cr. With an atmosphere of CO 2 =1 atm, there is no increase in the CrO 4 2− concentration in the solution phase during a period of 5 h. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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