EP 1660699 A1 20060531 - METHOD FOR APPLYING A PHOSPHATE COATING ON A STEEL OR IRON PART, AND CORRESPONDING STEEL OR IRON PART
Title (en)
METHOD FOR APPLYING A PHOSPHATE COATING ON A STEEL OR IRON PART, AND CORRESPONDING STEEL OR IRON PART
Title (de)
VERFAHREN ZUM AUFBRINGEN EINER PHOSPHATBESCHICHTUNG AUF EIN STAHL- ODER EISENTEIL UND ENTSPRECHENDES STAHL- ODER EISENTEIL
Title (fr)
PROCEDE D'APPLICATION D'UN REVETEMENT AU PHOSPHATE SUR UNE PIECE EN ACIER OU EN FER ET PIECE EN ACIER OU EN FER CORRESPONDANTE
Publication
Application
Priority
- EP 2005003911 W 20050411
- ES 200401059 A 20040504
Abstract (en)
[origin: WO2005106074A1] Method for applying a phosphate coating on an iron or steel part, and corresponding iron or steel part. The method according to the invention consists in a first coating step with a first phosphating, through which a first crystalline layer of iron and manganese phosphates is obtained, an intermediate step of partial pickling of said first crystalline layer of phosphates, leaving the base metal partially uncovered, and a second coating step comprising a second phosphating through which a second crystalline layer of iron and manganese phosphates is obtained, covering the partially pickled first layer of phosphates and the base metal. The method provides a coating with a lower thickness, a finer crystallisation and a lower rugosity Rk than the one that can be obtained by a simple phosphating.
IPC 1-7
IPC 8 full level
C23C 22/18 (2006.01); C23C 22/73 (2006.01)
CPC (source: EP US)
C23C 22/18 (2013.01 - EP US); C23C 22/73 (2013.01 - EP US)
Citation (search report)
See references of WO 2005106074A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2005106074 A1 20051110; WO 2005106074 A8 20060309; EP 1660699 A1 20060531; ES 2213500 A1 20040816; ES 2213500 B1 20050501; US 2008264523 A1 20081030
DOCDB simple family (application)
EP 2005003911 W 20050411; EP 05759114 A 20050411; ES 200401059 A 20040504; US 57077806 A 20060303