Aluminium Pechiney

Societe De Vente De L'aluminium Pechiney

Precision Mecanique Labinal

Jacques Lefebvre

Gabriel Colombier

Armand Golay

Philippe Gimenez

Jean S Safrany

Jos Patrie

Jean-Louis Mazodier

Andre Savigny

Michel Ladet

Dominique Boddele

Jean Galand

Bernard Harel

The invention relates to a method of continuously coating electrically conductive substrates using high-speed electrolysis in which the substrate is immersed successively in an electrolytic activating bath and an electrolytic coating bath. The two baths are of the same composition and the substrate is constantly maintained in one bath. The method is applicable especially to the nickel plating of fine aluminum wires intended for the production of flexible cable for aeronautical applications. These wires may be treated in layers and at high speed.

Method of continuous coating of electrically conductive substrates

To form lead or lead alloy terminals on cables comprising an insulative sheath and an aluminum core, the appropriate length of the core is bared and a metal part is fixed to the bared core. The terminal is then cast over this metal part. The metal part is compatible externally with the lead or the lead alloy forming the terminal and is compatible internally with the aluminum core. No high-resistivity substance is formed between any component layers of the resulting assembly.

Method of forming lead terminals on aluminum or aluminum alloy cables

A method is disclosed for checking and obtaining in a moving mode the continuity of a metal covering on a metal wire of different nature belonging to the group of a wire being treated by a current strength and issuing from a covering bath and wire, the treatment of which is achieved and coming from a storage wheel. The method comprises continuously bringing the coated wire in contact with a volume of electrolyte solution chemically and physically inert with respect to the wire, and in which the sensitive part of a reference electrode is immersed, sliding the wire issuing from the volume against an electrical contact, measuring the electrical potential variations between the electrode and the contact, and when the potential current oscillates, noting the poorly covered wire and increasing the current strength on the wire being treated.

Method for checking in a moving mode the continuity of a metal covering

The invention relates to a process and an apparatus for electrolytically depositing, in a moving mode, a continuous film of nickel on metal wire for electrical use. The process comprises using an activation bath and a nickel-plating bath in which the current density is reduced in the upstream portion of the nickel plating bath and/or the downstream portion of the activation bath and the acidity of the nickel-plating bath is so regulated as to develop the nickel in the form of strongly adhering globules of small diameter, which completely cover the wire. The reduction in the above mentioned current density and control in respect of the current density profile along the bath may be achieved by acting on the position of the electrodes in the bath and/or by interposing screens between the electrodes and the wire.

Process and apparatus for electrolytically depositing in a moving mode a

A process for the continuous, electrolytic plating of a long span of metal with a layer of metal, having a high line speed and low period of immersion in the electrolyte, and a device therefor. The span of metal is passed through a shaving drawplate, then through a metal plating solution to which an electric voltage is applied through a fluid electric connector comprising a solution of metal chloride, a fluoride and boric acid. The process is used to plate a metal with an adhesive metal layer, which provides both ductility to facilitate extrusion and low, non-evolving contact resistance.

Process for plating a long span of metal with a metal layer

The invention relates to elements of aluminum, such as bars, sections or apparatus components for forming electrical contacts capable of withstanding mechanical and thermal stressing. The method by which these elements are produced consists in depositing a firmly adhering layer of nickel to the aluminum substrate at least in the contact zone. The quality of the contact is further improved when the nickel-plated element is in contact with a silver-plated element.

Aluminum electrical contacts and method of making same

A method is disclosed for coating aluminum electrical conductors with an oxide of a controlled thickness to minimize the subsequent in situ deposition of an insulating layer of an electrically resistive oxide at the junction of the aluminum conductor and another electrical conductor.

Method of surface treating an aluminum wire for electrical use

A piston made of aluminum alloy with its surface treated by anodization in a phosphoric medium, onto which a layer of an anti-friction metal is deposited by electrolysis, so that the piston does not seize on contact with a cylinder with its internal wall made of aluminum alloy.

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Voiron, France

Jacques Lefebvre