Sollac

Usinor

Unisor

Ronald Kefferstein

Lothaire W Scherer

Claude Morand

Philippe Antoine

Xavier Jartoux

Process for the manufacture of a part with very high mechanical properties, formed by stamping of a strip of rolled steel sheet and more particularly hot rolled and coated

An aqueous composition containing at least 2% by weight of pregelatinized starch and, as an emulsion, at least 1% or vegetable wax or oil, preferably chosen from carnauba wax, jojoba oil and candelilla wax. Also a process for applying a layer of this composition and in drying it so as to obtain a dry film having; a surface density of between 1 and 2.5 g/m . Treating a metal surface with the composition provides temporary corrosion protection and prelubrication.

Treatment composition based on pregelatinized starch and process for applying it to a metal, especially steel, surface

The invention concerns a composition useful for providing temporary protection against corrosion to metal surfaces comprising an oil-in-water emulsion characterised in that said emulsion contains in its aqueous phase at least a compound of general formula (I) in which the groups R, R,and R,represent independently of one another a hydrogen atom, a C,-C,alkyl group, a C,-C,halogenoalkyl group with the halogen being chlorine, bromine, iodine or fluorine, a C,-C,cycloalkyl group, a carboxylic function or a C,-C,carboxyalkyl group; n is a whole number varying from 1 to 3; and X represents an oxygen or sulphur atom in the form of one of its soluble salts. The invention also concerns a method for preparing said composition, its method of application to the surface of metal part and the resulting part.

Composition for temporarily protecting metal components from corrosion, its processes of preparation and of application, and metal components obtained from this composition

The present invention relates to a process for treating the surface of a metal part to prepare it for drawing and to protect it temporarily against corrosion, comprising applying an aqueous treatment composition to the surface of said part and drying the aqueous composition so applied, characterized in that the aqueous composition is first obtained by mixing:

Process for treating the surface of metal parts

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Saint Victoret, France

Ronald Kefferstein