Coating for copper-plating-free welding wire and application thereof

The invention provides coating for a copper-plating-free welding wire and application thereof and belongs to the field of copper-plating-free welding wires. The coating comprises the following raw materials of, by weight, 30-40 parts of acrylic resin emulsion, 5-10 parts of grapheme, 10-20 parts of nano titanium dioxide, 2-5 parts of calcium stearate, 2-3 parts of a dispersing agent, 1-2 parts of a wetting agent, 1-2 parts of a defoaming agent and 25-40 parts of water. According to the coating for the copper-plating-free welding wire, a coated layer can be formed on the surface of the welding wire, and according to the prepared welding wire, abrasion of an existing copper-plating-free welding wire to a current contact nozzle can be greatly reduced, and the wire feeding performance of the welding wire in the using process can be improved. A uniform and thickness-controllable protective film can be formed on the surface of the copper-plating-free welding wire, the surface of the welding wire is smooth, and the