Office National D'etudes Et De Recherches Aerospatiales

Office National D'etudes Et De Recherches Aerospatiales (onera)

Pierre J Lepetit

Philippe M Galmiche

Emile J Genieys

The invention relates to depositing a metal on small-sized objects by electrolytic means. The objects are maintained in suspension in an electrolyte containing the metal to be deposited and which flows in a closed circuit while passing between two electrodes which are alternately anode and cathode, the anode being protected by a mobile screen able to assume two positions. The temperature of the electrolyte and the concentration of ions of said metal therein are maintained constant.

Process and device for coating small-sized elements with a metal deposit

In the process of forming a coating selected from nickel and cobalt-based atings on a surface of a component made of a metallic material having a total composition by weight comprising at least 50% of metal selected from the group consisting of iron, cobalt and nickel, the improvement comprising forming at least one layer of an alloy of boron with one of nickel, cobalt and nickel/cobalt on the component, after which the boron is eliminated.

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Saint-Vrain, France

Pierre J Lepetit