Electrodes are important constituents of plasma devices determining the properties of arc discharge. The arc-electrode interaction enables the current transfer in the thin near-electrode layer and controls the energy balance and the heating of the electrodes. In this work, an up-to-date nonequilibrium model, aimed at the unified description of the arc from the one electrode to the other, is used to analyse the arc-electrode interaction in a free-burning argon arc at atmospheric pressure. The space-charge sheaths adjacent to the electrodes are treated consistently with the bulk plasma in order to obtain the sheath voltage drops. The heat fluxes toward the electrodes, and the temperatures of heavy particles and electrons, are presented for arc currents of 100-200 A.