Electrochemical evaluation of the AISI 316 stainless steel coated by Nb2O5 thin films
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2018
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BRAZILIAN MRS MEETING, 17th
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Resumo
Great number of metallic engineering materials form passive films on their
surfaces and, therefore, are prone to localized corrosion, usually characterized by
the occurrence of pits [1,2]. The improvement of surface properties is a
requirement for the metallic components used, for example, in petrochemical
industry, in fuel cells, and in nuclear plants. The goal of this work was to
investigate the influence of Nb2O5 films deposited by DC magnetron sputtering
during 15, 30 and 50 minutes on the electrochemical behavior of the AISI 316
austenitic stainless steel. The corrosion resistance was evaluated by monitoring
the open circuit potential (OCP), electrochemical impedance spectroscopy (EIS)
and linear potentiodynamic polarization (LP) on an electrolyte composed of 0.1 M
H2SO4 in water at 25 °C. Electrochemical tests showed that the coated specimens
presented a more capacitive behavior, and were less susceptible to corrosion than
specimens without Nb2O5 coatings. The OCP for coated samples at 50 min had the
most inferior values. Similar results were obtained by Pillis et al. [3] for Nb2O5
coatings at 15 min and 30 min in NaCl solution. These results suggest that the
obtained films have a protective behavior and can be used to avoid the
degradation of the AISI 316 austenitic stainless steel in aggressive environments
containing sulfur ions.
Como referenciar
PIERETTI, EURICO F.; CORREA, OLANDIR V.; PILLIS, MARINA F.; RAMANATHAN, LALGUDI V. Electrochemical evaluation of the AISI 316 stainless steel coated by Nb2O5 thin films. In: BRAZILIAN MRS MEETING, 17th, September 16-20, 2018, Natal, RN. Abstract... São Carlos: Aptor Software, 2018. p. 1465-1465. Disponível em: http://repositorio.ipen.br/handle/123456789/30337. Acesso em: 20 Mar 2026.
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.