C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/42 (2006.01) C23C 22/17 (2006.01) C23C 22/18 (2006.01) C23C 22/36 (2006.01) C23C 22/44 (2006.01)
Patent
CA 2171180
The invention concerns a method of phosphatizing steel, zinc-coated steel and aluminium using phosphatization solutions containing hydroxylamine and/or nitrobenzene sulphonate, these solutions being largely free of undesirable nickel, nitrites and nitrates as well as being free of copper and oxo-anions of halogens.
L'invention concerne des procédés de phosphatage de l'acier, de l'acier galvanisé et de l'aluminium, à l'aide de solutions de phosphatage contenant de l'hydroxylamine et/ou du nitrobenzènesulfonate. Ces solutions sont exemptes, dans une large mesure, de nickel, de nitrite et de nitrate, de même que de cuivre et d'oxy-anions d'halogènes.
Brands Karl Dieter
Brouwer Jan-Willem
Gottwald Karl-Heinz
Mayer Bernd
Roland Wolf-Achim
Henkel Kommanditgesellschaft Auf Aktien
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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