EP 0658636 B1 19991229 - Corrosion protecting process for steel sheet, plated on one side with a Zn-Ni allog
Title (en)
Corrosion protecting process for steel sheet, plated on one side with a Zn-Ni allog
Title (de)
Verfahren zum Korrosionsschutz von Stahblech, einsetig beschichted mit einer Zn-Ni Legierung
Title (fr)
Procédé de protection contre la corrosion d'une tÔle d'acier revêtue d'un alliage Zn-Ni sue l'une de ses faces
Publication
Application
Priority
FR 9315196 A 19931214
Abstract (en)
[origin: EP0658636A1] Corrosion inhibitor for a metallic material such as steel, of the type consisting of an aqueous solution containing an alkali metal nitrite, characterised in that the said solution contains 0.01 to 0.3 mol/l of an alkali metal nitrite, 0.01 to 0.3 mol/l of an alkali metal phosphate and phosphoric acid in the proportion of a quantity sufficient to maintain the pH of the said solution, measured at ambient temperature, between 6.9 and 7.2.
IPC 1-7
IPC 8 full level
C23F 11/00 (2006.01); C23C 22/68 (2006.01); C23F 11/18 (2006.01); C23G 1/00 (2006.01)
CPC (source: EP KR US)
C23C 22/68 (2013.01 - EP US); C23F 11/00 (2013.01 - KR); C23F 11/188 (2013.01 - EP US); C23G 1/00 (2013.01 - EP US)
Citation (examination)
- DE 4228470 A1 19940303 - HENKEL KGAA [DE], et al
- The international Water Conference,35th Annual Meeting, October 1974, Pages 169-176.Engineers Society of Western Pennsylvania,Pittsburgh (US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
EP 0658636 A1 19950621; EP 0658636 B1 19991229; AT E188264 T1 20000115; CA 2137837 A1 19950615; DE 69422377 D1 20000203; DE 69422377 T2 20000824; ES 2141813 T3 20000401; FR 2713669 A1 19950616; FR 2713669 B1 19960105; JP 3398724 B2 20030421; JP H0835083 A 19960206; KR 100358219 B1 20030124; KR 950018670 A 19950722; US 5567354 A 19961022
DOCDB simple family (application)
EP 94470040 A 19941121; AT 94470040 T 19941121; CA 2137837 A 19941212; DE 69422377 T 19941121; ES 94470040 T 19941121; FR 9315196 A 19931214; JP 33308594 A 19941214; KR 19940034009 A 19941213; US 34618894 A 19941122