EP 1206589 A2 20020522 - ACCELERATOR FOR PHOSPHATING METAL SURFACES
Title (en)
ACCELERATOR FOR PHOSPHATING METAL SURFACES
Title (de)
BESCHLEUNIGER FÜR DIE PHOSPHATIERUNG VON METALLOBERFÄCHEN
Title (fr)
CATALYSEUR POUR LA PHOSPHATATION DE SURFACES METALLIQUES
Publication
Application
Priority
- DE 19939519 A 19990820
- EP 0007850 W 20000811
Abstract (en)
[origin: DE19939519A1] Acidic aqueous phosphating solution contains zinc ions, phosphate ions, and at least one organic nitro-compound as accelerator selected from nitroarginine, its esters with 1-4 C alcohols, and 5-nitro-2-furfurylidenedicarboxylates of specified formula. Acidic aqueous phosphating solution contains 0.2-3 g/l zinc ions, 3-50 g/l phosphate ions calculated as PO4<3->, and 0.5-5 g/l of at least one organic nitro-compound as accelerator selected from nitroarginine, its esters with 1-4 C alcohols, and 5-nitro-2-furfurylidenedicarboxylates of formula (I): R = 1-3 C alkyl. Independent claims are also included for the following: (A) an aqueous concentrate produced from the phosphating solution; and (B) a process for phosphating metal surfaces made of steel, galvanized or alloy-galvanized steel or aluminum comprising contacting the metal surfaces with the phosphating solution by spraying with and/or immersing in the phosphating solution for 3 seconds to 8 minutes.
IPC 1-7
IPC 8 full level
C23C 22/10 (2006.01); C23C 22/12 (2006.01); C23C 22/18 (2006.01); C23C 22/22 (2006.01); C23C 22/36 (2006.01)
CPC (source: EP)
C23C 22/12 (2013.01); C23C 22/364 (2013.01); C23C 22/365 (2013.01)
Citation (search report)
See references of WO 0114613A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19939519 A1 20010222; AU 6995000 A 20010319; DE 50001815 D1 20030522; EP 1206589 A2 20020522; EP 1206589 B1 20030416; JP 2003507579 A 20030225; WO 0114613 A2 20010301; WO 0114613 A3 20011213
DOCDB simple family (application)
DE 19939519 A 19990820; AU 6995000 A 20000811; DE 50001815 T 20000811; EP 0007850 W 20000811; EP 00958432 A 20000811; JP 2001518478 A 20000811