C - Chemistry – Metallurgy – 23 – D
Patent
C - Chemistry, Metallurgy
23
D
C23D 3/00 (2006.01) C23D 5/02 (2006.01)
Patent
CA 2400069
The invention concerns a method which consists in: providing a protective treatment against corrosion to the initial sheet metal using an aqueous emulsion containing colloids based on acrylic and/or methacrylic polymer; a step which consists in applying a coat of liquid enamelling composition comprising an enamel frit capable of being vitrified; a baking step adapted to vitrify said frit. The invention is characterised in that said method does not comprise a step for degreasing said surface subsequent to the protective treatment. The invention provides the advantages of improved adherence of the enamel and a simpler process.
Procédé comprenant: un traitement de protection contre la corrosion de la tôle de départ à l'aide d'une émulsion aqueuse comprenant des colloïdes à base de polymère acrylique et/ou méthacrylique; une étape d'application d'une couche de composition liquide d'émaillage comprenant une fritte d'émail vitrifiable; une étape de cuisson adaptée pour faire vitrifier ladite fritte; caractérisé en ce que ledit procédé ne comporte pas d'étape de dégraissage de ladite surface postérieurement au traitement de protection. Avantages: meilleure adhérence de l'émail, simplification du procédé.
Delmotte Christophe
Legros Philippe
Malot Thierry
Nicoletti Patrick
Robic
Usinor
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