A method for producing a coated material having an oxidizable metal-containing coating, including the step of applying to a base material (11) an oxidizable metal-containing coating fluid containing a particulate oxidizable metal, a carbon component, a thickener, and water using a coating apparatus (1) and a coating fluid preparation step in which a thickener solution prepared by dissolving the thickener in water, the particulate oxidizable metal, and the carbon component or an aqueous dispersion of the carbon component are put and mixed in a preparation tank (3) to prepare the oxidizable metal-containing coating fluid. In the coating fluid preparation step, the particulate oxidizable metal is added to the thickener solution. The coating apparatus (1) includes a relay tank (4) capable of temporarily storing the coating fluid to be fed from the preparation tank (3) to a coating unit (5), so that the oxidizable metal-containing coating fluid in the preparation tank (3) is fed to the coating unit (5) through the relay tank (4).
