Hydrotalcite coatings to protect spent sluminum-clad nuclear fuels during long term wet storage
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2015
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EUROPEAN CORROSION CONGRESS
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Resumo
Pitting corrosion of the aluminium cladding of spent research reactor (RR) fuels in
wet storage has been reported and attributed to synergistic influence of certain water
parameters. Hence, use of conversion coatings to protect spent Al-clad RR fuel
during long term wet storage was proposed. The objective was to develop a coating
using a conventional chemical process as opposed to an electrochemical process
due to constraints related to the shape of the fuel and its high radioactivity. In this
context hydrotalcite (HTC) and boehmite were considered. This paper presents: (a)
preparation of boehmite and hydrotalcite (HTC) coatings from different baths followed
by post-coating treatments; (b) corrosion behavior of coated AA 6061 alloy; (c)
results of field studies in which uncoated and coated AA 6061 alloy coupons and
plates, the latter assembled as a dummy fuel element, were exposed to the IEA-R1
reactor spent fuel basin for periods of up to 14 months. The laboratory tests revealed
marked increase in corrosion resistance of HTC coated specimens. In field tests the
HTC coated coupons and plates did not reveal any pits. The mechanism of corrosion
protection is presented.
Como referenciar
FERNANDES, S.M.C.; CORREA, O.V.; SOUZA, J.A. de; ANTUNES, R.A.; OLIVEIRA, M.C.L. de; RAMANATHAN, L.V. Hydrotalcite coatings to protect spent sluminum-clad nuclear fuels during long term wet storage. In: EUROPEAN CORROSION CONGRESS, September 6-10, 2015, Graz, Austria. Proceedings... p. 1-8. Disponível em: http://repositorio.ipen.br/handle/123456789/27336. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.