OLANDIR VERCINO CORREA

OLANDIR VERCINO CORREA

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Coatings for safe long term wet storage of spent Al-clad research reactor fuels
2015 - RAMANATHAN, L.V.; FERNANDES, S.M.C.; CORREA, O.V.; SOUZA, J.A. de; ANTUNES, R.A.; OLIVEIRA, M.C.L. de
Pitting corrosion of the aluminium cladding of spent research reactor (RR) fuels in wet storage has been observed and the use of conversion coatings to protect the cladding was proposed. A coating prepared by conventional chemical processing as opposed to electrochemical processing is the only option due to constraints related to the shape of the fuel and its high radioactivity. Hence, hydrotalcite (HTC) and boehmite were considered. This paper presents: (a) preparation of hydrotalcite (HTC) coatings from different baths followed by post-coating treatments; (b) corrosion behavior of HTC coated AA 6061 alloy; (c) results of field studies in which uncoated and HTC 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 extended periods. The laboratory and field tests revealed marked improvements in the corrosion resistance of HTC coated specimens, coupons and plates. The mechanism of corrosion protection is presented.
Effect of preparation technique on the extent of corrosion protection of aa 6061 alloy by hydrotalcite coatings
2014 - FERNANDES, S.M.; CORREA, O.V.; SOUZA, J.A.; RAMANATHAN, L.V.; ANTUNES, R.A.; OLIVEIRA, M.C. de
Conversion coatings to protect spent nuclear fuel during extended wet storage
2012 - FERNANDES, S.M.C.; CORREA, O.V.; SOUZA, J.A. de; RAMANATHAN, L.V.
Estudo do comportamento de oxidação de ligas DeCr e FeCrY recobertas por uma tinta a abase de aluminio
2006 - PILLIS, M.F.; CORREA, O.V.; ARAUJO, E.G. de; RAMANATHAN, L.V.
Coatings for increased corrosion resistance of aluminium-clad spent fuel in wet storage
2012 - FERNANDES, S.M.C.; CORREA, O.V.; SOUZA, J.A. de; RAMANATHAN, L.V.
Cerium modified conversion coatings to protect aluminium cladding of spent nuclear fuel during extended wet storage
2012 - FERNANDES, STELA M.C.; CORREA, OLANDIR V.; SOUZA, JOSE A. de; RAMANATHAN, LALGUDI V.
Protection od spent aluminium-clad research reactor fuels during extended wet storage
2013 - FERNANDES, STELA M.C.; CORREA, OLANDIR V.; SOUZA, JOSE A .; ANTUNES, RENATO A.; OLIVEIRA, MARA C.L. de; RAMANATHAN, LALGUDI V.
Conversion coatings to protect Al-CLAD spent fuel in wet storage
2013 - FERNANDES, S.M.C.; CORREA, O.V.; SOUZA, J.A. de; LIMA, N.B. de; RAMANATHAN, L.V.; ANTUNES, R.A.; OLIVEIRA, M.C.L. de
Corrosion behaviour of a commercial NdFeB magnet in various solutions
1998 - COSTA, I.; CORREA, O.V.; FARIA JUNIOR, R.N.
Effect of coupon orientation on corrosion behaviour of aluminium alloy coupons in the sepent fuel storage section of the IEA-R1 research reactor
2006 - CORREA, O.V.; LOBO, R.M.; FERNANDES, S.M.C.; MARCONDES, G.; RAMANATHAN, L.V.
Surveillance programmes to monitor the corrosion of aluminium clad spent research reactor fuels have used test racks containing horizontal metallic coupons. Spent MTR type fuel elements are usually stored vertically, with its fuel plates, also vertical. Hence, the influence of coupon orientation on the corrosion behaviour of aluminium alloy coupons exposed to the spent fuel storage section of the IEA-R1 research reactor in São Paulo, Brazil has been studied. Circular coupons of aluminium alloys AA 1050 and AA 6061, oriented both vertically and horizontally, were exposed to the storage section water for a year. Individual and coupled coupons were exposed to simulate general, crevice and galvanic corrosion. The storage section water parameters were periodically measured. Pitting was the main form of corrosion and coupon orientation had a marked effect on the extent of pitting. Vertically oriented coupons pitted less than horizontally oriented coupons.