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METHODS FOR MAKING COATED THREADED METALLIC

  • US 20120168317A1
  • Filed: 12/23/2011
  • Published: 07/05/2012
  • Est. Priority Date: 12/27/2010
  • Status: Abandoned Application
First Claim
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1. A method for coating a threaded metallic piece, comprising:

  • providing a bath which comprises Zn ions,introducing the metallic piece into the bath, wherein the metallic piece acts as a cathode of an electrolytic cell and wherein electro-deposition of a first layer comprising Zn is brought about on the surface of the metallic piece, andapplying on the piece coated by the first layer a second layer of a polyester-based paint.

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