caa a22 4500 475815076 CHVBK 20180406123807.0 cr unu---uuuuu 170329e20000701xx s 000 0 eng 10.1023/A:1004037429196 doi (NATIONALLICENCE)springer-10.1023/A:1004037429196 On gas bubbles in industrial aluminium cells with prebaked anodes and their influence on the current distribution [Elektronische Daten] [J. Zoric, A. Solheim] The secondary current distribution in industrial aluminium cells with prebaked anodes was calculated, taking into account the gas bubbles. The input data were obtained on the basis of a physical model and data suggested in the literature. The bubbles were modelled in the following manner: (i) as very small bubbles dispersed in a homogeneous layer with higher electrical resistivity than the bulk of the electrolyte, (ii) as large bubbles modelled as discrete slabs with infinite resistivity, and (iii) as a combination of (i) and (ii). The bubble size and the number of bubbles, as well as the resistance of the homogeneous bubble layer, were varied to give an equivalent voltage drop in the range 0.1-0.4 V. Large bubbles (slabs) appeared to have a significant screening effect on the anodic current densities. The anodic current densities between slabs showed local maxima, sometimes reaching twice the value of the working current density (0.75 A cm−2). The cathodic current densities had local minima underneath the large anodic bubbles, following their position at the anode. Underneath a bubble of 6.1 cm width, the cathodic current density decreased from 0.75 to 0.23 A cm−2. Kluwer Academic Publishers, 2000 aluminium cells nationallicence gas bubbles nationallicence Zoric J. SINTEF Materials Technology, N-7465, Trondheim, Norway aut Solheim A. SINTEF Materials Technology, N-7465, Trondheim, Norway aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/7(2000-07-01), 787-794 0021-891X 30:7<787 2000 30 10800 https://doi.org/10.1023/A:1004037429196 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1004037429196 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zoric J. SINTEF Materials Technology, N-7465, Trondheim, Norway aut NATIONALLICENCE 700 1- Solheim A. SINTEF Materials Technology, N-7465, Trondheim, Norway aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/7(2000-07-01), 787-794 0021-891X 30:7<787 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer