C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
C25D 11/36 (2006.01) C23C 22/17 (2006.01) C23C 22/18 (2006.01) C23C 22/22 (2006.01)
Patent
CA 2608390
The invention relates to a method for preparing metallic workpieces for cold forming by contacting the metallic surfaces thereof with an aqueous acid phosphating solution so as to embody at least one phosphate coating and then coating the phosphate-coated surfaces with at least one lubricant in order to embody at least one lubricant layer. According to the inventive method, the phosphating solution essentially contains only calcium, magnesium, or/and manganese as cations that are selected among cations of main group 2 and subgroups 1, 2, and 5 to 8 of the periodic table of chemical elements in addition to phosphate. Furthermore, an alkaline earth metal-containing phosphating solution is free from fluoride and complex fluoride while the phosphating process is carried out electrolytically. The invention further relates to a metallic workpiece that is coated accordingly as well as the use of workpieces coated in said manner.
L'invention concerne un procédé de préparation de pièces métalliques pour le formage à froid par mise en contact des surfaces métalliques des pièces avec une solution de phosphatation acide aqueuse de manière à former au moins un revêtement phosphate, et revêtement des surfaces revêtues de phosphate avec au moins un lubrifiant de manière à former au moins une couche de lubrifiant. Selon l'invention, la solution de phosphatation contient en tant que cations choisis parmi les cations du 2ème groupe principal et des groupes secondaires 1, 2 et 5 à 8 du tableau périodique des éléments, essentiellement du calcium, du magnésium et/ou du manganèse et du phosphate, la solution de phosphatation contenant des métaux alcalino-terreux étant exempte de fluorure et de fluorure complexe et étant phosphatée électrolytiquement. L'invention concerne également une pièce métallique revêtue de la sorte, et l'utilisation des pièces ainsi revêtues.
Lang Andreas
Nittel Klaus-Dieter
Schneider Ralf
Chemetall Gmbh
Robic
LandOfFree
Method for preparing metallic workpieces for cold forming does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for preparing metallic workpieces for cold forming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for preparing metallic workpieces for cold forming will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1691473