EP 0385806 B1 19940914 - Phosphate coatings for metal surfaces.
Title (en)
Phosphate coatings for metal surfaces.
Title (de)
Phosphatbeschichtungen für Metalloberflächen.
Title (fr)
Revêtements en phosphate pour surfaces métalliques.
Publication
Application
Priority
JP 5056789 A 19890302
Abstract (en)
[origin: EP0385806A1] A process for phosphating a metal surface which comprises treating the metal surface with an acidic aqueous phosphate solution containing:- (a) from 0.1 to 2.0g/l of zinc ion; (b) from 5 to 40g/l of phosphate ion; (c) a phosphating accelerator comprising: (1) from 0.01 to 0.5g/l of nitrite ion, (11) from 0.05 to 5g/l of m-nitrobenzene sulfonate ion, or (iii) from 0.5 to 10g/l of hydrogen peroxide (base on 100% H2O2); and (d) from 0.01 to 10g/l of colloidal particles having an isolectric point of 3 or less and an average particle diameter of 0.1 or less.
IPC 1-7
IPC 8 full level
C23C 22/12 (2006.01); C23C 22/13 (2006.01); C23C 22/14 (2006.01); C23C 22/16 (2006.01); C23C 22/17 (2006.01); C23C 22/18 (2006.01)
CPC (source: EP)
C23C 22/14 (2013.01); C23C 22/16 (2013.01); C23C 22/184 (2013.01); C23C 22/362 (2013.01)
Citation (examination)
EP 0201228 A2 19861112 - ALLEGHENY LUDLUM STEEL [US]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0385806 A1 19900905; EP 0385806 B1 19940914; DE 69012374 D1 19941020; DE 69012374 T2 19950330; JP H02228482 A 19900911; JP H0819531 B2 19960228
DOCDB simple family (application)
EP 90302271 A 19900302; DE 69012374 T 19900302; JP 5056789 A 19890302