In this work the metallic cobalt was electrodeposited on 430 steel in order to obtain a low electrical resistance film made to Co(3)O(4). Pure cobalt was obtained by acidic dissolution of lithium cobalt oxide (LiCoO(2)) present in exhausted Li-ion battery cathode. The electrodeposition was performed with a 96% efficiency at a potential of 1.50 V versus Ag/AgCl. The electrodeposited cobalt showed the face-centered cubic (23%) and hexagonal centered (77%) phases. After oxidation at 850 A degrees C for 1000 h in air, the cobalt layer was transformed into the Co(3)O(4) phase. On the other hand, a sample without cobalt showed the usual Cr(2)O(3) and FeCr(2)O(4) phases. After 1000 h at 850 A degrees C, in air the area specific resistance of the sample with the cobalt oxide layer was 0.038 Omega cm(-2), while it was 1.30 Omega cm(-2) for the bare sample.