Method of electroplating and pre-treating aluminium workpieces

Details Method of electroplating and pre-treating aluminium workpieces Method of electroplating and pre-treating aluminium workpieces

B - Operations, Transporting

23

K

B23K 35/22 (2006.01) B23K 35/02 (2006.01) C25D 3/12 (2006.01) C25D 3/20 (2006.01) C25D 5/44 (2006.01)

Patent

CA 2591116

The invention relates to a method of applying a metal layer onto at least one surface of an aluminium or aluminium alloy workpiece, including the steps of pre-treating the surface by cathodic activation in a pre-treatment bath containing sulphuric acid and metal-ions selected from the group consisting of nickel, iron and cobalt, and applying a metal layer by electroplating the pretreated workpiece, and wherein the metal layer is selected from the group consisting of nickel, iron, cobalt, and alloys thereof.

L'invention porte sur un procédé d'application d'une couche métallique sur l'une des surfaces au moins d'une pièce d'aluminium ou d'alliage d'aluminium comportant les étapes suivantes: prétraitement de la surface par activation cathodique par trempage dans un bain contenant de l'acide sulfurique et des ions métalliques choisis parmi le nickel, le fer et le cobalt; et application par électroplacage sur la pièce prétraitée d'une couche d'un métal choisi parmi le nickel, le fer, le cobalt ou leurs alliages.

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