caa a22 4500 477051367 CHVBK 20180405111340.0 cr unu---uuuuu 170330e19960501xx s 000 0 eng 10.1007/BF01021974 doi (NATIONALLICENCE)springer-10.1007/BF01021974 The chronopotentiometric method for measuring the kinetics of metal dissolution and cementation reactions [Elektronische Daten] [J. Zheng, M. Khan, S. La Brooy, I. Ritchie, P. Singh] The validity of the chronopotentiometric method, which has been used for studying the kinetics of metal dissolution and cementation (displacement) reactions was examined. Using the dissolution of electrodeposited zinc films as an example, results are presented for the dissolution in a triiodide solution, in an acid solution and in an acidified triiodide solution. The effect of the substrate electrode, on which the zinc film is deposited, was found to be negligible in the case of the triiodide dissolution reaction which is known to be diffusion controlled. However, the substrate electrode can have a profound effect on the dissolution in acid, a reaction which is known to be chemically controlled. In addition, the apparent dissolution rate in acidified triiodide solutions can be greater than the sum of the separate dissolution rates. Explanations for these findings, based on the catalytic effect of the substrate electrodes, are presented. The applicability of the chronopotentiometric method to the cementation of copper (II) on to electrodeposited zinc filsm was also investigated. Similar difficulties to those found with the zinc/acidified triiodide system were encountered. As a result of the understanding of the pit-falls of the chronopotentiometric method developed in this work, it was possible to review critically previous measurements of this type, which have been reported in the literature. It was concluded that, while the majority of previous studies are correct, a serious error has been made in one paper. Chapman & Hall, 1996 Zheng J. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut Khan M. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut La Brooy S. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut Ritchie I. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut Singh P. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/5(1996-05-01), 509-514 0021-891X 26:5<509 1996 26 10800 https://doi.org/10.1007/BF01021974 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01021974 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zheng J. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut NATIONALLICENCE 700 1- Khan M. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut NATIONALLICENCE 700 1- La Brooy S. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut NATIONALLICENCE 700 1- Ritchie I. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut NATIONALLICENCE 700 1- Singh P. A. J. Parker Cooperative Research Centre for Hydrometallurgy, School of Mathematical and Physical Sciences, Murdoch University, 6150, Western Australia aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/5(1996-05-01), 509-514 0021-891X 26:5<509 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer