Corrosion behavior of hydrotalcite coated AA 6061 alloy
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2014
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CONGRESSO BRASILEIRO DE CORROSÃO, 34.; INTERNATIONAL CORROSION MEETING, 5th.; CONGRESO IBEROAMERICANO DE CORROSIÓN Y PROTECCIÓN, 10th.; CONCURSO DE FOTOGRAFIA DE CORROSÃO E DEGRADAÇÃO DE MATERIAIS, 19.; EXPOSIÇÃO DE TECNOLOGIAS PARA PREVENÇÃO E CONTROLE DA CORROSÃO, 34
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Resumo
Pitting corrosion of the aluminium cladding of spent research reactor (RR) fuel during wet
storage is the main form of degradation and this could eventually lead to release of fissile
material and contamination of storage facilities. Hence, the use of conversion coatings to
protect spent Al-clad RR fuel during long term storage was proposed. Preliminary laboratory
and field investigations carried out at IPEN in São Paulo, Brazil, revealed that cerium
hydroxide coatings increased the corrosion resistance of Al alloys. These investigations were
extended to include boehmite, hydrotalcite (HTC), cerium modified boehmite and cerium
modified HTC coatings on Al alloy surfaces. This paper presents: (a) the preparation of
hydrotalcite coatings from different baths followed by post-coating treatments; (b) the results
of x-ray diffraction analysis and scanning electron microscopic studies of the HTC coatings;
(c) the effect of HTC coating process variables such as temperature, duration of treatment and
the duration of cerium modification on HTC morphology and electrochemical polarization
behavior of HTC coated AA 6061 alloy in NaCl; (d) results of field tests in which uncoated
and HTC coated AA 6061 coupons were exposed to the IEA-R1 reactor spent fuel basin for
up to 5 months. The laboratory test specimens as well as the field test coupons coated with
HTC from a high temperature bath followed by cerium modification were the most resistant
to pitting.
Como referenciar
FERNANDES, STELA M.; CORREA, OLANDIR V.; SOUZA, JOSE A.; RAMANATHAN, LALGUDI V.; ANTUNES, RENATO A.; OLIVEIRA, MARA C. de. Corrosion behavior of hydrotalcite coated AA 6061 alloy. In: CONGRESSO BRASILEIRO DE CORROSÃO, 34.; INTERNATIONAL CORROSION MEETING, 5th.; CONGRESO IBEROAMERICANO DE CORROSIÓN Y PROTECCIÓN, 10th.; CONCURSO DE FOTOGRAFIA DE CORROSÃO E DEGRADAÇÃO DE MATERIAIS, 19.; EXPOSIÇÃO DE TECNOLOGIAS PARA PREVENÇÃO E CONTROLE DA CORROSÃO, 34, 19-23 de maio, 2014, Fortaleza, CE. Anais... Rio de Janeiro, RJ: Associação Brasileira de Corrosão – ABRACO, 2014. Disponível em: http://repositorio.ipen.br/handle/123456789/26438. Acesso em: 13 Mar 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.