| 摘要 |
PROBLEM TO BE SOLVED: To obtain metallic products free of swelling defects with good productivity by subjecting a porous metallic material in which many pinholes exist to powder coating by using a solventless type powder coating material contg. powder coating components having an average grain size existing within a specific range, then subjecting the material to a backing treatment under specific conditions. SOLUTION: At the time of producing the metallic products by subjecting the porous metallic material in which the many pinholes, etc. exist to finish coating, the surface of the porous metallic material is subjected to the powder coating by using the solventless type powder coating material contg. the resin powder having the average grain size of 5 to 30μm, then subjecting the material to the backing treatment for 1 to 5 minutes at temp. of 200 to 400 deg.C. While the resin powder coating component is adequately the resin powder components of an epoxy system, polyester system, etc., further a proper amt. of flaky powder, such as flaky aluminum powder, flaky copper powder and mica powder and/or fine resin beads may be preferably added and incorporated therein. If necessary, a flow accelerator and a hardener are added thereto.
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