caa a22 4500 477052002 CHVBK 20180405111341.0 cr unu---uuuuu 170330e19961101xx s 000 0 eng 10.1007/BF00243732 doi (NATIONALLICENCE)springer-10.1007/BF00243732 Anodic dissolution of nickel in concentrated sulfuric acidic solutions [Elektronische Daten] [G. Cordeiro, O. Mattos, O. Barcia, L. Beaunier, C. Deslouis, B. Tribollet] The anodic dissolution of nickel in concentrated sulfuric acidic solutions is characterized by two diffusion plateaux related to the active and transpassive regions. For the same speed of rotation of a rotating disc electrode, the two plateaux currents are almost identical. However, the less anodic one gives rise to a rough electrode surface while a polished surface is observed at the more anodic one. For nickel as-received, mass transport influences the current over the whole potential range. After heat treatment, only the current for the two plateaux were mass transport controlled. Electrochemical impedance diagrams show that the lowest frequency capacitive loop is influenced by mass transport. Electrohydrodynamic (EHD) impedance diagrams show two different regions. In the low frequency range, the results follow the theoretical curve corresponding to a uniformly accessible electrode with a very high Schmidt number around 107. At high frequency, the EHD impedance may correspond to an interface covered by a gel layer formed from the products of the anodic dissolution. Chapman & Hall, 1996 Cordeiro G. Lab. de Corrosião "Prof. Manoel de Castro”, EE/PEMM/COPPE/UFRJ, Brazil aut Mattos O. Lab. de Corrosião "Prof. Manoel de Castro”, EE/PEMM/COPPE/UFRJ, Brazil aut Barcia O. Departmento Fisico-Química, IQ/UFRJ, Brazil aut Beaunier L. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut Deslouis C. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut Tribollet B. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/11(1996-11-01), 1083-1092 0021-891X 26:11<1083 1996 26 10800 https://doi.org/10.1007/BF00243732 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00243732 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cordeiro G. Lab. de Corrosião "Prof. Manoel de Castro”, EE/PEMM/COPPE/UFRJ, Brazil aut NATIONALLICENCE 700 1- Mattos O. Lab. de Corrosião "Prof. Manoel de Castro”, EE/PEMM/COPPE/UFRJ, Brazil aut NATIONALLICENCE 700 1- Barcia O. Departmento Fisico-Química, IQ/UFRJ, Brazil aut NATIONALLICENCE 700 1- Beaunier L. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut NATIONALLICENCE 700 1- Deslouis C. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut NATIONALLICENCE 700 1- Tribollet B. UPR 15 du CNRS, Laboratoire Physique des Liquides et Electrochimie, Paris, France aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/11(1996-11-01), 1083-1092 0021-891X 26:11<1083 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer