SIMOES, A.M.P.SILVA, R.M.P.SUFFREDINI, H.B.SANTOS, L.F.BASTOS, I.N.2023-03-202023-03-20SIMOES, A.M.P.; SILVA, R.M.P.; SUFFREDINI, H.B.; SANTOS, L.F.; BASTOS, I.N. Naphthenic corrosion using electrochemical and analytical techniques. In: JORNADAS DE CORROSÃO E PROTEÇÃO DE MATERIAIS, 8th, November 24, 2022, Lisboa, Portugal. <b>Proceedings...</b> Lisboa, Portugal: LNEG - Laboratório Nacional de Energia e Geologia, 2022. p. 29-30. DOI: <a href="https://dx.doi.org/10.34637/4cw4-w798">10.34637/4cw4-w798</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/33893.http://repositorio.ipen.br/handle/123456789/33893Naphthenic acid corrosion of steel was studied in a stagnant, biphasic oil/aqueous phase system, by means of electrochemical measurements and surface analysis. Corrosion was restricted to the region of the aqueous phase, as crater-shaped pits that eventually coalesced, generating a nearly uniform attack in the vicinity of the oil phase. In-situ electrochemical impedance spectroscopy (EIS) reveals the processes occurring at the aqueous phase, which nevertheless increase with the fraction of oil phase and with degree of acidity of the oil.29-30openAccessTexto completo de evento10.34637/4cw4-w798