The local electrochemical behavior of the AA2098‐T351 and surface preparation effects investigated by scanning electrochemical microscopy
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Surface and Interface Analysis
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In this work, scanning electrochemical microscopy (SECM) measurements were
employed to characterize the electrochemical activities on polished and as‐received
surfaces of the 2098‐T351 aluminum alloy (AA2098‐T351). The effects of the near
surface deformed layer (NSDL) and its removal by polishing on the electrochemical
activities of the alloy surface were evaluated and compared by the use of different
modes of SECM. Confocal laser scanning microscopy (CLSM) and scanning electron
microscopy (SEM) were also employed to characterize the morphology of the
surfaces. The surface chemistry was analyzed by X‐ray photoelectron spectroscopy
(XPS). The surface generation/tip collection (SG/TC) and competition modes of the
SECM were used to study hydrogen gas (H2) evolution and oxygen reduction reactions,
respectively. H2 evolution and oxygen reduction were more pronounced on
the polished surfaces. The feedback mode of SECM was adopted to characterize
the electrochemical activity of the polished surface that was previously corroded by
immersion in a chloride‐containing solution, in order to investigate the influence of
the products formed on the active/passive domains. The precorroded surface and
as‐received surfaces revealed lower electrochemical activities compared with the
polished surface showing that either the NSDL or corrosion products largely
decreased the local electrochemical activities at the AA2098‐T351 surfaces.
Como referenciar
SILVA, REJANE M.P. da; MILAGRE, MARIANA X.; OLIVEIRA, LEANDRO A. de; DONATUS, UYIME; ANTUNES, RENATO A.; COSTA, ISOLDA. The local electrochemical behavior of the AA2098‐T351 and surface preparation effects investigated by scanning electrochemical microscopy. Surface and Interface Analysis, v. 51, n. 10, p. 982-992, 2019. DOI: 10.1002/sia.6682. Disponível em: http://repositorio.ipen.br/handle/123456789/30485. 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.