Method for forming electroplating film on surfaces of articles
First Claim
1. A method for forming an electroplating film on the surface of a rare earth permanent magnet, which comprises:
- forming on the surface of the magnet, a resin coating made of a resin containing dispersed therein a powder of a first metal;
then forming a second-metal substituted plating film on the surface of the resin coating by immersing the resin-coated magnet 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, wherein the resin coating is a non-conductive coating, the second metal and the third metal are the same, and the step of forming the substituted plating film and the step of forming the electroplating film are carried out in the same plating bath.
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Accused Products
Abstract
An object of the present invention is to provide a method for forming a uniform and dense electroplating film with high adhesion strength on the surface of an article, yet irrespective of the surface material and the surface properties of the article. A means for a solution of the problem comprises: forming on the surface of the article, a resin coating made of a resin containing dispersed therein a powder of a first metal; 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; and further forming an electroplating film of a third metal on the surface of the metal-substituted plating film.
9 Citations
9 Claims
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1. A method for forming an electroplating film on the surface of a rare earth permanent magnet, which comprises:
- forming on the surface of the magnet, a resin coating made of a resin containing dispersed therein a powder of a first metal;
then forming a second-metal substituted plating film on the surface of the resin coating by immersing the resin-coated magnet 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, wherein the resin coating is a non-conductive coating, the second metal and the third metal are the same, and the step of forming the substituted plating film and the step of forming the electroplating film are carried out in the same plating bath. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- forming on the surface of the magnet, a resin coating made of a resin containing dispersed therein a powder of a first metal;
Specification