MHD electrode development

Results of bonding studies in support of an evaluation of platinum capped anodes and iron cathodes are presented. In addition, an attachment technique has been developed for bonding the indium-doped hafnia current leadout material to a compliant nickel mesh and results are reported. Laboratory electrochemical corrosion tests indicate that major reductions in polarization, electrical resistivity and ionic transference number of the slag can be achieved with moderate additions of cobalt which will produce a significant reduction in the electrochemical stress. Status of design, procurement and modification activities in support of the installation of a conventional three tesla magnet is presented.