The oxidation of aniline is studied by the potentiodynamic method on an electrode of an amor phous metallic alloy Al 87 Ni 8 Y 5 and the results are compared with the analogous data on a polycrystalline alu minum electrode. The aniline oxidation and, correspondingly, the polyaniline deposition are shown to pro ceed more actively on the contact side of the amorphous metal alloy Al 87 Ni 8 Y 5 electrode. The morphology of synthesized polyaniline films is studied on both sides of the working electrode. It is found that the polya niline layer structure is to the large extent granulated on the contact side and smooth on the external side.