EP 0359296 B1 19930217 - PHOSPHATING PROCESS
Title (en)
PHOSPHATING PROCESS
Publication
Application
Priority
DE 3828676 A 19880824
Abstract (en)
[origin: GB2223239A] For the phosphating of galvanised surfaces, in particular of galvanised steel, the surfaces are brought into contact, for a maximum duration of 10 s, with a phosphating solution which contains accelerator, in particular nitrate 0.5 to 5.0 g/l zinc 3 to 20 g/l phosphate (calculated as P2O5> 0.3 to 3 g/l magnesium in a ratio by weight of magnesium: zinc = (0.5 to 10): 1 and has an S-value in the range of from 0.1 to 0.4. <??>It is particularly advantageous to use phosphating solutions containing a maximum of 1.5 g/l of zinc, preferably 0.5 to 1 g/l of zinc, with a ratio by weight of magnesium : zinc of (0.5 to 3) : 1, nickel ions in a maximum quantity of 1.5 g/l, preferably in a maximum quantity of 0.5 g/l as well as simple or complex fluoride in a maximum quantity of 3 g/l, preferably of 0.1 to 1.5 g/l (calculated as F in each case). <??>It is particularly advantageous to apply the process to the treatment of galvanised steel strip with subsequent lacquering or coating with organic films, which may be acrylates, epoxides, polyesters silicon-modified acylates, polyvinyl fluorides, polyvinylidene fluorides, or polyvinylchlorides.
IPC 1-7
IPC 8 full level
C23C 22/12 (2006.01); C23C 22/13 (2006.01); C23C 22/22 (2006.01); C23C 22/34 (2006.01); C23C 22/36 (2006.01)
CPC (source: EP US)
C23C 22/12 (2013.01 - EP US); C23C 22/13 (2013.01 - EP US); C23C 22/368 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE ES FR IT NL SE
DOCDB simple family (publication)
EP 0359296 A1 19900321; EP 0359296 B1 19930217; AT E85817 T1 19930315; CA 1332560 C 19941018; DE 3828676 A1 19900301; DE 58903562 D1 19930325; ES 2038400 T3 19930716; GB 2223239 A 19900404; GB 2223239 B 19920923; GB 8919200 D0 19891004; JP 2770860 B2 19980702; JP H02101175 A 19900412; US 5152849 A 19921006
DOCDB simple family (application)
EP 89201935 A 19890722; AT 89201935 T 19890722; CA 608617 A 19890814; DE 3828676 A 19880824; DE 58903562 T 19890722; ES 89201935 T 19890722; GB 8919200 A 19890823; JP 21314189 A 19890821; US 68310691 A 19910410