C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/12 (2006.01) C23C 22/13 (2006.01) C23C 22/18 (2006.01)
Patent
CA 2315778
The invention relates to the phosphatization of the galvanized side of a single-face galvanized steel strip using a phosphatizing solution containing 1- 6 g/l zinc ions and 10-30 g/l phosphate ions. The invention is characterized in that the phosphatizing solution contains one or several constituents a) to c): a) 60-1000 mg/l of one or several monovalent or multivalent alchohols with at least a triple bond between two carbon atoms, b) 10-160 mg/l of one or several alkyl or alkenyl nitrogen compounds with at least 5 C atoms and c) 10- 250 mg/l alkali metal iodide. Preferably, the phosphatizing solution contains at least 2 and especially all 3 constituents a), b) and c).
L'invention concerne un procédé de phosphatation de feuillard d'acier galvanisé d'un seul côté, au moyen d'une solution de phosphatation qui contient 1 à 6 g/l d'ions zinc et 10 à 30 g/l d'ions phosphate. L'invention est caractérisée en ce que la solution de phosphatation contient en outre un ou plusieurs des composants suivants: a) 60 à 1000 mg/l d'un ou plusieurs alcools monovalents ou polyvalents comportant au moins une liaison triple entre deux atomes de carbone, b) 10 à 160 mg/l d'un ou plusieurs composés d'alkyle-azote ou d'alcényle-azote comportant au moins 5 atomes de carbone et c) 10 à 250 mg/l d'iodure de métaux alcalins. De préférence, la solution de phosphatation contient au moins deux des composants a), b) et c), et en particulier les trois.
Jansen Walter
Mohr Klaus-Peter
Riesop Joerg
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Thyssen Krupp Stahl Ag
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