EP 0006046 B1 19840201 - USE OF A SOLUTION FOR FORMING PROTECTIVE LAYERS ON ZINC SURFACES BY ELECTROLYSIS
Title (en)
USE OF A SOLUTION FOR FORMING PROTECTIVE LAYERS ON ZINC SURFACES BY ELECTROLYSIS
Publication
Application
Priority
FR 7814950 A 19780519
Abstract (en)
[origin: US4243496A] The invention relates to the protection of zinc surfaces by depositing a protecting coating. The process of the invention comprises the formation of a pyrophosphate coating by electrolytic oxidization of the articles treated in contact with a solution containing pyrophosphate ions or ions capable of giving pyrophosphates. The invention is particularly useful for protecting galvanized objects in contact with aqueous environments.
IPC 1-7
IPC 8 full level
C25D 11/34 (2006.01); C25D 11/36 (2006.01)
CPC (source: EP US)
C25D 11/36 (2013.01 - EP US)
Citation (examination)
- Die Phosphatierung von Metallen (Werner Rausch) p 78, 90
- The condensed Chemical Dictionary, p. 799-800
Designated contracting state (EPC)
AT BE CH DE GB IT LU NL
DOCDB simple family (publication)
EP 0006046 A1 19791212; EP 0006046 B1 19840201; AT E6078 T1 19840215; DE 2966600 D1 19840308; FR 2426097 A1 19791214; FR 2426097 B1 19801107; JP S552793 A 19800110; JP S624480 B2 19870130; US 4243496 A 19810106
DOCDB simple family (application)
EP 79400312 A 19790517; AT 79400312 T 19790517; DE 2966600 T 19790517; FR 7814950 A 19780519; JP 6213679 A 19790518; US 4045479 A 19790518