C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 22/18 (2006.01) C23C 22/36 (2006.01) C23C 22/73 (2006.01)
Patent
CA 2440151
The invention relates to a method for coating metallic surfaces by a manganese- zinc phosphatizing process, using an aqueous phosphatizing solution, in which nickel is deliberately not added. Said method is characterized in that the zinc: manganese weight ratio of the phosphatizing solution is maintained in the region of between 0.05: 1 and 0.99: 1 and that the phosphatizing solution has the following contents: between 0.05 and 5 g/l zinc, between 0.075 and 5.2 g/l manganese and between 0.008 and 0.050 g/l copper and/or hexafluoride complexes of titanium, hafnium and/or zirconium totalling between 0.002 and 0.5 g/l, calculated as F6. The invention also relates to the use of the metal parts coated in this manner.
L'invention concerne un procédé de revêtement de surfaces métalliques par phosphatation au manganèse-zinc avec une solution de phosphatation aqueuse, selon lequel la solution de phosphatation n'est pas pourvue intentionnellement de nickel. Ledit procédé est caractérisé en ce que le rapport massique zinc : manganèse de la solution de phosphatation est maintenu entre 0,05 : 1 et 0,99 : 1, et en ce que la solution de phosphatation contient 0,05 à 5 g/L de zinc, 0,075 à 5,2 g/L de manganèse, 0,008 à 0,050 g/L de cuivre, et/ou 0,002 à 0,5 g/L de complexes d'hexafluorure de titane, hafnium, et/ou zirconium, calculé en tant que F¿6?. L'invention concerne également l'utilisation des éléments métalliques ainsi revêtus.
Bittner Klaus
Kolberg Thomas
Rengnet-Ferrier Severine
Schuellermann Gerrit
Specht Juergen
Chemetall Gmbh
Robic
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