caa a22 4500 477049249 CHVBK 20180405111338.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00242044 doi (NATIONALLICENCE)springer-10.1007/BF00242044 Influence of anode material on current yield during ferrate( vi ) production by anodic iron dissolution Part II: Current efficiency during anodic dissolution of white cast iron to ferrate( vi ) in concentrated alkali hydroxide solutions [Elektronische Daten] [K. Bouzek, I. Roušar, M. Taylor] The dependence of the current efficiency for the oxidation of a white cast iron anode to ferrate(vi) ions in 14 m NaOH was measured in the region of bubble induced convection for the temperature range 10 to 50 °C. Using a white cast iron anode the highest current yield obtained after 3 h of electrolysis was 55% at a current density of 8 mA cm−2 and a temperature of 20°C. The anode was activated by cathodic prepolarization. The iron concentration in low oxidation states contained in the post electrolysis solution increased with temperature over the whole temperature range studied. This concentration was almost 10 times higher than in the case of grey cast iron reported earlier. The dependence of ferrate(vi) current yield on the hydroxide concentration was studied in the range 5 to 16 m. The optimum concentration was found to be 14 m. The quasisteady state anodic polarization curve of white cast iron anode in the transpassive potential region was measured. This shows the start of oxygen evolution occurring at higher potentials compared to grey cast iron. Chapman & Hall, 1996 Bouzek K. Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28, Prague 6, Czech Republic aut Roušar I. Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28, Prague 6, Czech Republic aut Taylor M. University College Cork, Ireland aut Journal of Applied Electrochemistry Kluwer Academic Publishers 26/9(1996-09-01), 925-931 0021-891X 26:9<925 1996 26 10800 https://doi.org/10.1007/BF00242044 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00242044 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bouzek K. Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Roušar I. Department of Inorganic Technology, Prague Institute of Chemical Technology, 166 28, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Taylor M. University College Cork, Ireland aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 26/9(1996-09-01), 925-931 0021-891X 26:9<925 1996 26 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 477049249 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer