Abstract: A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10?2 mbar and 2·10?1 mbar. A fabrication method is also provided.

Abstract: A vacuum deposition facility is provided for continuously depositing on a running substrate coatings formed from metal alloys including a main element and at least one additional element. The facility includes a vacuum deposition chamber and a substrate running through the chamber. The facility also includes a vapor jet coater, an evaporation crucible for feeding the vapor jet coater with a vapor having the main element and the at least one additional element, a recharging furnace for feeding the evaporation crucible with the main element in molten state and maintaining a constant level of liquid in the evaporation crucible, and a feeding unit being fed with the at least one additional element in solid state for feeding the evaporation crucible with the at least one additional element either in molten state, in solid state or partially in solid state. A process is also provided.

Abstract: A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10?2 mbar and 2·10?1 mbar. A fabrication method and an installation are also provided.

Abstract: The present invention relates to a vacuum deposition facility for depositing a metal alloy coating on a substrate (7), said facility being equipped with a vapour generator/mixer comprising a vacuum chamber (6) in the form of an enclosure provided with means for creating a vacuum state therein relative to the external environment and provided with means for the entry and exit of the substrate (7), while still being essentially sealed from the external environment, said enclosure including a vapour deposition head, called the injector (3), configured so as to create a jet of metal alloy vapour of sonic velocity towards the surface of the substrate (7) and perpendicular thereto, said ejector (3) being in sealed communication with a separate mixer device (14), which is itself connected upstream to at least two crucibles (11, 12) respectively, these containing different metals M1 and M2 in liquid form, each crucible (11, 12) being connected to the mixer (14) by its own pipe (4, 4?).

Abstract: Equipment for manufacturing a metal strip coated by a process that includes vacuum-depositing a layer of an oxidizable metal or an oxidizable metal alloy on a metal strip precoated with zinc or with a zinc alloy, then coiling the coated metal strip, then oxidizing a surface of the metal strip coated with the oxidizable metal or oxidizable metal alloy and treating the oxidized wound coil with a static diffusion treatment to obtain a strip having a coating that includes, in an upper portion, a layer of an alloy formed by diffusion of the oxidizable metal or the oxidizable metal alloy in all or part of the zinc or zinc alloy layer. The equipment includes a device for galvanizing the metal strip, a vacuum deposition coating device, and a static heat treatment device operating in a controlled atmosphere.

Abstract: The invention relates to a process for coating a metal strip, in which a layer of an oxidizable metal or an oxidizable metal alloy or a metal oxide is vacuum-deposited on a metal strip precoated with zinc or with a zinc alloy, the coated metal strip is then coiled, and the wound coil undergoes a static diffusion treatment so as to obtain a strip having a coating that comprises, in the upper portion, a layer of an alloy formed by diffusion of the oxidizable metal or the oxidizable metal alloy in all or part of the zinc or zinc alloy layer, and also to equipment for implementing the process.

Abstract: A method for the fabrication of a coated sheet is provided. The method includes the steps of providing a sheet in a deposition chamber, maintaining the deposition chamber at a pressure Pchamber, maintaining an ejection chamber that is located inside the deposition chamber at a pressure Peject and coating the sheet with zinc with a sonic vapor jet. A ratio of the pressures Pchamber to Peject is between 2·10?3 and 5.5·10?2.

Abstract: The present invention relates to a facility for the continuous vacuum deposition of a metal coating on a substrate in motion, comprising a vacuum deposition enclosure (24), at least one vapor jet deposition head (25,26) connected to an evaporator pot (9) designed to contain the coating metal in liquid form (11), through a vapor supply pipe (20) provided with a distribution valve (19), and a melting furnace (1) for said metal, said furnace being at atmospheric pressure, located below the lowest portion of the evaporator pot (9) and connected to the evaporator pot (9) by at least one automatic supply pipe (8) of the evaporator pot (9) provided with a supply pump (6) and by at least one liquid metal return pipe (8A,18) optionally provided with a valve (16,17), regulating means for the supply pump (6) further being present to regulate a determined liquid metal level in the evaporator pot (9), characterized in that it comprises, in each said supply and return pipes (8; 8A,18), a so-called heat valve area (7,13,15)

Abstract: A vacuum deposition facility for continuously depositing coatings formed from metal alloys having at least two metallic elements on a running substrate is provided. The vacuum deposition facility includes a vacuum deposition chamber, a substrate running through the vacuum deposition chamber and an evaporation crucible inside the vacuum deposition chamber. The evaporation crucible includes a heater and a bath of molten metal alloy which has at least two metallic elements in a predetermined and constant ratio. The evaporation crucible evaporates the molten metal alloy into a vapor. The vacuum deposition facility also includes a coater inside the vacuum deposition chamber and connected to the evaporation crucible. The coater sprays a face of the running substrate with the vapor at a sonic velocity in order to deposit a coating on the running substrate. The vapor includes the at least two metallic elements in the predetermined and constant ratio.

Abstract: The invention relates to a plasma source (1) for depositing a coating onto a substrate (9), which is connectable to a power source (P) and includes: an electrode (2); a magnetic assembly (4) located circumferentially relative to said electrode and including a set of magnets mutually connected by a magnetic bracket (46) including a first and second central magnet (43, 44) and at least one head magnet (45); and an electrically insulating enclosure (5) arranged such as to surround the electrode and the magnets.

Abstract: Substrate provided with a plurality of layers, at least one of which includes metal oxides and is topped directly by a metal coating layer that contains at least 8% by weight nickel and at least 10% by weight chromium, the remainder being iron, additional elements and the impurities resulting from the fabrication process, wherein this metal coating layer is topped directly by an anticorrosion coating layer. A corresponding fabrication method is also provided.

Abstract: A steel sheet is provided with a coating having at least one layer of zinc and a top layer of paint applied by cataphoresis. The zinc layer is deposited by a jet vapor deposition process in a deposition chamber maintained at a pressure between 6·10?2 mbar and 2·10?1 mbar. A fabrication method is also provided.

Abstract: A steel sheet is provided with a coating. The coating includes at least one layer of zinc, obtained by a jet vapor deposition method in which a ratio between a pressure inside the deposition chamber Pchamber and a pressure inside the zinc ejection chamber Peject is between 2·10?3 et 5.5·10?2 A method for fabricating the steel sheet is also provided.

Abstract: The invention relates to a plasma source (1) for depositing a coating onto a substrate (9), which is connectable to a power source (P) and includes: an electrode (2); a magnetic assembly (4) located circumferentially relative to said electrode and including a set of magnets mutually connected by a magnetic bracket (46) including a first and second central magnet (43, 44) and at least one head magnet (45); and an electrically insulating enclosure (5) arranged such as to surround the electrode and the magnets.

Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.

Abstract: The present invention relates to a facility for the continuous vacuum deposition of a metal coating on a substrate in motion, comprising a vacuum deposition enclosure (24), at least one vapor jet deposition head (25,26) connected to an evaporator pot (9) designed to contain the coating metal in liquid form (11), through a vapor supply pipe (20) provided with a distribution valve (19), and a melting furnace (1) for said metal, said furnace being at atmospheric pressure, located below the lowest portion of the evaporator pot (9) and connected to the evaporator pot (9) by at least one automatic supply pipe (8) of the evaporator pot (9) provided with a supply pump (6) and by at least one liquid metal return pipe (8A,18) optionally provided with a valve (16,17), regulating means for the supply pump (6) further being present to regulate a determined liquid metal level in the evaporator pot (9), characterized in that it comprises, in each said supply and return pipes (8; 8A,18), a so-called heat valve area (7,13,15)

Abstract: The invention relates to a method of cleaning the surface of a material that is coated with an organic substance. The inventive method is characterized in that it comprises the following steps, consisting in: introducing the material into a treatment chamber, having a pressure of between 10 mbar and 1 bar therein, which is supplied with a gas stream containing at least 90 volume percent of oxygen; and generating a plasma by passing an electric discharge between the surface of the material and a dielectric-covered electrode in order to break down the organic substance under the action of the free radicals O thus produces. The invention also relates to an installation that is used to carry out said method.

Abstract: The present invention provides a process for coating a substrate. A metal alloy layer including at least two metallic elements is continuously deposited on the substrate by a vacuum deposition facility. The facility includes a vapor jet coater for spraying the substrate with a vapor containing the metallic elements in a constant and predetermined relative content, the vapor being sprayed at a sonic velocity. The process may advantageously be used for depositing Zn—Mg coatings. The invention also provides a vacuum deposition facility for continuously depositing coatings formed from metal alloys, for implementing the process.

Abstract: The invention relates to a process for coating a substrate (S) whereby a metal alloy layer comprising at least two metallic elements is continuously deposited on the substrate (S) by means of a vacuum deposition facility (1) comprising a vapor jet coater (7) for spraying the substrate (S) with a vapor containing the metallic elements in a constant and predetermined relative content, the vapor being sprayed at a sonic velocity. The process is more particularly intended for depositing Zn—Mg coatings. The invention also relates to a vacuum deposition facility (1) for continuously depositing coatings formed from metal alloys, for implementing the process.

Abstract: The invention relates to a process for coating a metal strip, in which a layer of an oxidizable metal or an oxidizable metal alloy or a metal oxide is vacuum-deposited on a metal strip precoated with zinc or with a zinc alloy, the coated metal strip is then coiled, and the wound coil undergoes a static diffusion treatment so as to obtain a strip having a coating that comprises, in the upper portion, a layer of an alloy formed by diffusion of the oxidizable metal or the oxidizable metal alloy in all or part of the zinc or zinc alloy layer, and also to equipment for implementing the process.