<p>In the present study, the effect of an electroless Ni–Co–CeO₂–La₂O₃ composite coating on the oxidation behavior and electrical properties of AISI 430 ferritic stainless steel interconnect plates after long-term oxidation at 800&#xa0;°C was examined. To evaluate oxidation behavior, micrographs of the surface and cross-sections of uncoated and coated samples were analyzed before and after oxidation using SEM (Scanning Electron Microscope) and FESEM (Field Emission Scanning Electron Microscope). Additionally, the weight change of these samples was monitored to study their oxidation kinetics. The electrical properties of the samples were assessed after oxidation by measuring their Area Specific Resistance (ASR). The results showed that applying the Ni–Co–CeO₂–La₂O₃ coating on the steel reduced the oxide layer thickness on the steel surface and decreased the oxidation rate from 7.59×10^–11 to 3.02×10^–13 g²·cm^–4·s^–1. The evaluation of electrical behavior also showed that after 400 hours of oxidation, the ASR value for the uncoated sample was 39.6 mΩ·cm², whereas applying the composite coating led to a significant reduction of this parameter to 13.9 mΩ·cm².</p>