Method for forming electroplated coating on surface of article

A method for forming a substituted plating film on the surface of an article, which comprises:

• forming on the surface of the article, a resin coating made of a resin containing dispersed therein a powder of a first metal, and then forming a second-metal substituted plating film on the surface of the resin coating by immersing the resin-coated article in a solution containing ions of a second metal having an ionization potential nobler than that of the first metal.

A rare earth permanent magnet having an electroplating film on the surface thereof, which is produced by forming a non-conductive coating on the surface of a rare earth permanent magnet using a resin containing dispersed therein a powder of a first metal;

• then forming a second-metal substituted plating film on the surface of the non-conductive coating by immersing the magnet having formed thereon the non-conductive coating in a solution containing ions of a second metal having an ionization potential nobler than that of the first metal;
• and further forming an electroplating film of a third metal on the surface of the metal-substituted plating film.

A rare earth permanent magnet having an electroplating film on the surface thereof, comprising, formed on the surface of a rare earth permanent magnet, a non-conductive coating made of a resin containing dispersed therein a powder of a first metal, and having further thereon an electroplating film of a third metal, with a substituted plating film of a second metal that is nobler than the first metal interposed between them.

A rare earth permanent magnet having a substituted plating film on the surface thereof, comprising, formed on the surface of a rare earth permanent magnet, a non-conductive coating made of a resin containing dispersed therein a powder of a first metal, and having further thereon a substituted plating film of a second metal that is nobler than the first metal.

A rare earth permanent magnet having a non-conductive coating on the surface thereof, comprising, formed on the surface of a rare earth permanent magnet, a non-conductive coating made of a resin containing dispersed therein a powder of a first metal.