The invention discloses an automobile hub
coating film, which comprises a hub body, wherein the surface of the hub body is provided with a primer layer, a middle
coating and a finish paint layer frominside to outside in sequence; the primer layer, the middle
coating and the finish paint layer are all in spraying and forming arrangement by
powder paint; the grain
diameter of the
powder is 30-45 micrometers, a leveling rate and a powdering rate can be balanced, and surface properties, including coating film gloss, plumpness and the like, are excellent; the
powder grain
diameter of the finish paint layer is greater than the powder grain
diameter of the middle coating and the powder grain diameter of the primer layer in sequence; and the thickness of the middle coating is greater than the thickness of the primer layer and the thickness of the finish paint layer in sequence. By use of a powder paint way, the omission of a base
colored paint for automobile hub painting becomes a new development direction, so that the emission of VOCs (Volatile Organic Compounds) in a whole painting process is lowered by about 20% according to the characteristic of zero VOC of the powder paint, paintingworking procedures are reduced, efficiency is improved, a yield is improved, and cost is lowered.