Composition for temporarily protecting metal parts against...

C - Chemistry – Metallurgy – 23 – F

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C23F 11/16 (2006.01)

Patent

CA 2295864

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, R1 and R2 represent independently of one another a hydrogen atom, a C1-C20 alkyl group, a C1-C20 halogenoalkyl group with the halogen being chlorine, bromine, iodine or fluorine, a C3-C6 cycloalkyl group, a carboxylic function or a C1-C6 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 parts and the resulting parts.

La présente invention a pour objet une composition utile pour conférer une protection temporaire contre la corrosion à des surfaces métalliques comprenant une émulsion d'huile dans l'eau caractérisée en ce que ladite émulsion comprend dans sa phase aqueuse au moins un composé de formule générale (I) dans laquelle les groupements R, R1 et R2 représentent indépendamment l'un de l'autre un atome d'hydrogène, un groupement alkyle en C1 à C20, un groupement halogénoalkyle en C1 à C20 avec l'halogène pouvant être le chlore, brome, iode ou fluor, un groupement cycloalkyle en C3 à C6, une fonction carboxylique ou un groupement carboxylalkyle en C1 et C6, n est un entier variant de 1à 3 et X représente un atome de soufre ou d'oxygène, sous la forme d'un de ses sels hydrosolubles. Elle se rapporte également au procédé de préparation de ladite composition, à son procédé d'application à la surface de pièces métalliques et aux pièces ainsi obtenues.

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