Sollac

Sollac (societe Anonyme)

Michel Nogues

Jean-Marc Rouxel

Marc Dauzat

Patrick Abed

The subject of the invention is a method for coating a metallurgical product, especially a steel product, in which said product is dipped into a bath of metallic alloy containing solid impurities, wherein said bath of alloy is exposed to sound vibration so as to accelerate the decantation of said impurities. The subject of the invention is also an installation for coating metallurgical products (3), especially steel products, of the type comprising a tank (1) containing a bath (2) of metallic alloy and means (4, 5) for dipping said products (3) into said bath of alloy, wherein it also comprises means (13, 14) for exposing said bath of alloy to sound vibration.

Method for the purification of a bath for coating metallurgical products

The device comprises an ultrasonic wave emitter (4) whose lower end portion (5) is immersed in the reactive solution (2) in which a sheet (3) to be pickled is immersed, and this end portion is provided with two emitting plates (6,7) respectively positioned on each side of an edge portion of the sheet (3) with their planar emitting surfaces parallel to the sheet and contained in two antinodal planes. Consequently, the two plates (6,7) vibrate in phase opposition and, if the vibratory amplitude is sufficiently large, these vibrations create a cavitation in the liquid in the space between the surfaces (3a,3b) of the edge portion and the plates (6,7) which considerably accelerates the rate of removal of scale from the edge portion.

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Triel-sur-Seine, France

Michel Nogues