C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/12 (2006.01) C01B 21/14 (2006.01) C23C 22/36 (2006.01)
Patent
CA 2277336
The invention concerns an acid aqueous phosphating solution which contains zinc ions, phosphate ions, copper ions and hydroxylamine in free form, as a salt or hydroxylamine-cleaving compound, and additionally one or a plurality of hydroxylamine stabilizers selected from organic molecules having at least two heteroatoms per molecule or, in the case of polymers, at least one heteroatom per four carbon atoms. The invention also concerns an aqueous concentrate and an aqueous supplementary solution for the phosphating solution.
L'invention concerne une solution de phosphatation aqueuse acide contenant des ions de zinc, des ions de phosphate, des ions de cuivre et de l'hydroxylamine sous forme libre, comme sel ou comme composé entraînant une rupture de l'hydroxylamine et en outre, un ou plusieurs agents stabilisants de l'hydroxylamine, sélectionnés parmi des molécules organiques présentant au moins deux hétéroatomes par molécule ou en cas de polymères, au moins un hétéroatome pour 4 atomes de carbone. L'invention concerne également un concentré aqueux et une solution complémentaire aqueuse pour la solution de phosphatation.
Brouwer Jan-Willem
Geke Juergen
Kleine-Bley Frank
Kuhm Peter
Mayer Bernd
Henkel Kommanditgesellschaft Auf Aktien
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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