Our recent work concerning the development of novel protective coatings based on copper-manganese oxide spinel will be presented. The current state of the art coating material, MnCo₂O₄ (or Mn_1.5Co_1.5O₄) contains cobalt, which is carcinogenic and is on the list of the critical raw elements. Its replacement with abundant copper can lead to increased independence on critical materials. One of the challenges of the manganes-copper oxide spinel coatings is the lack of their long term studies and not-clear stability issues. Through partial substitutions of the spinel elements, stabilization of the cubic phase has been achieved. The new materials have been deposited on Crofer 22 APU alloy as well as on 430, 441 alloys by Electrophoretic Deposition technique (EPD). Thorough investigation of the coatings parameters (solvent, concentration, deposition voltage, etc.) has been carried out. The protective properties of the new materials have been studied in temperature range 700-800°C for up to 10000 hours and important conclusions have been drawn.