EP 1119652 A4 20050223 - METHOD FOR FORMING A LUBRICATIVE FILM FOR COLD WORKING
Title (en)
METHOD FOR FORMING A LUBRICATIVE FILM FOR COLD WORKING
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES SCHMIERFILMS ZUM KALTUMFORMEN
Title (fr)
PROCEDE PERMETTANT DE FORMER UN FILM LUBRIFIANT ADAPTE AU TRAVAIL A FROID
Publication
Application
Priority
- JP 25876598 A 19980911
- JP 20697399 A 19990722
- US 9921117 W 19990913
Abstract (en)
[origin: WO0015879A1] A phosphate conversion coating of 6 to 20 g/m<2> is formed on a metal substrate, using an electrolytic solution containing zinc ions, phosphate ions, and an auxiliary acid, preferably nitric acid, and passing an electric current, with the substrate serving as the cathode, for a few seconds through the substrate, the electrolyte solution, and a counterelectrode. This provides a method for forming a lubricative film suitable for cold working without generating any sludge and at a high level of productivity. Lubrication performance may be checked by means of a backward punching test. The dies (2) are set to bind the circumference of the cylindrical test specimen (1) and the specimen is then subjected to a downward stroke from a punch (3).
IPC 1-7
IPC 8 full level
B21J 3/00 (2006.01); B21C 1/00 (2006.01); C10M 173/00 (2006.01); C25D 11/36 (2006.01); C10N 40/24 (2006.01); C10N 80/00 (2006.01)
CPC (source: EP)
C25D 11/36 (2013.01)
Citation (search report)
- [X] EP 0288853 A1 19881102 - NIHON PARKERIZING [JP]
- [X] WO 9217628 A1 19921015 - HENKEL KGAA [DE]
- [X] WO 9408074 A1 19940414 - HENKEL KGAA [DE], et al
- [E] EP 0972862 A2 20000119 - NIHON PARKERIZING [JP], et al
- [X] WO 9809006 A1 19980305 - DANFOSS AS [DK], et al
- [X] FR 2262134 A1 19750919 - PARKER STE CONTINENTALE [FR]
- [Y] SU 1090761 A1 19840507 - MO I VECHERNIJ METALL [SU]
- [Y] WO 9221737 A1 19921210 - HENKEL CORP [US]
- See references of WO 0015879A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 0015879 A1 20000323; CA 2343779 A1 20000323; EP 1119652 A1 20010801; EP 1119652 A4 20050223; JP 2000144494 A 20000526
DOCDB simple family (application)
US 9921117 W 19990913; CA 2343779 A 19990913; EP 99946930 A 19990913; JP 20697399 A 19990722