Reaction rates and prediction of thermal instability during aluminum alloy 6061 dissolution
Abstract
Here, chemical kinetics of dissolution of aluminum alloy 6061 was investigated for the processing of Pu-238 for deep space missions. The rate of dissolution was measured by the heat release and appeared to be controlled by the rate of release of Al(OH)4– from the metal surface. Rates of reaction were measured from 273 to 365 K, giving an activation energy of 72 ± 13 kJ•(mol Al)–1 and a pre-exponential factor of 5 ± 3 × 109 dm3mol–1min–1. Minor alloying elements did not appear to affect the reaction kinetics. The average heat of dissolution was –360 ± 70 kJ•(mol NaAlO2)–1. When extrapolated to an infinitely dilute solution of aluminum, kJ•(mol NaAlO2)–1.
- Authors:
-
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1440837
- Grant/Contract Number:
- AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Separation Science and Technology
- Additional Journal Information:
- Journal Volume: 53; Journal Issue: 12; Journal ID: ISSN 0149-6395
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Aluminum alloy 6061 dissolution; kinetics of aluminum dissolution; neptunium target cladding dissolution; plutonium-238 production
Citation Formats
McFarlane, J., DePaoli, D. W., and Mattus, C. H. Reaction rates and prediction of thermal instability during aluminum alloy 6061 dissolution. United States: N. p., 2017.
Web. doi:10.1080/01496395.2017.1377245.
McFarlane, J., DePaoli, D. W., & Mattus, C. H. Reaction rates and prediction of thermal instability during aluminum alloy 6061 dissolution. United States. https://doi.org/10.1080/01496395.2017.1377245
McFarlane, J., DePaoli, D. W., and Mattus, C. H. Fri .
"Reaction rates and prediction of thermal instability during aluminum alloy 6061 dissolution". United States. https://doi.org/10.1080/01496395.2017.1377245. https://www.osti.gov/servlets/purl/1440837.
@article{osti_1440837,
title = {Reaction rates and prediction of thermal instability during aluminum alloy 6061 dissolution},
author = {McFarlane, J. and DePaoli, D. W. and Mattus, C. H.},
abstractNote = {Here, chemical kinetics of dissolution of aluminum alloy 6061 was investigated for the processing of Pu-238 for deep space missions. The rate of dissolution was measured by the heat release and appeared to be controlled by the rate of release of Al(OH)4– from the metal surface. Rates of reaction were measured from 273 to 365 K, giving an activation energy of 72 ± 13 kJ•(mol Al)–1 and a pre-exponential factor of 5 ± 3 × 109 dm3mol–1min–1. Minor alloying elements did not appear to affect the reaction kinetics. The average heat of dissolution was –360 ± 70 kJ•(mol NaAlO2)–1. When extrapolated to an infinitely dilute solution of aluminum, kJ•(mol NaAlO2)–1.},
doi = {10.1080/01496395.2017.1377245},
journal = {Separation Science and Technology},
number = 12,
volume = 53,
place = {United States},
year = {2017},
month = {11}
}
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