EP 1208246 A1 20020529 - ZINC PHOSPHATIZING USING EPOXIDES
Title (en)
ZINC PHOSPHATIZING USING EPOXIDES
Title (de)
ZINKPHOSPHATIERUNG MIT EPOXIDEN
Title (fr)
PROCEDE DE PHOSPHATATION AU ZINC FAISANT INTERVENIR DES EPOXYDES
Publication
Application
Priority
- DE 19940619 A 19990827
- EP 0008069 W 20000818
Abstract (en)
[origin: DE19940619A1] The invention relates to a method for phosphatizing metal surfaces made of steel, galvanized or alloy-galvanized steel, aluminum and/or of aluminum alloys during which the metal surfaces are brought into contact with a phosphatizing solution that contains zinc by spraying or immersing the metal surfaces for a duration ranging from 3 seconds to 8 minutes. Said phosphatizing solution contains 0.2 to 3 g/l of zinc ions and 3 to 50 g/l of phosphate ions, whereby the weight ratio of phosphate ions to zinc ions is at least 3.7, and optionally contains one or more accelerators. In addition, the metal surfaces are brought into contact with an aqueous solution or suspension of an organic polymer during or after the phosphatizing. The inventive method is characterized in that the organic polymer is a polyepoxide selected from glycidyl ethers based on aliphatic polyols or based on bisphenol A or bisphenol F provided in a quantity ranging from 0.1 to 5 g/l in the aqueous solution or suspension.
IPC 1-7
IPC 8 full level
B05D 3/10 (2006.01); 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); C23C 22/22 (2006.01); C23C 22/36 (2006.01); C23C 22/83 (2006.01)
CPC (source: EP)
C23C 22/12 (2013.01); C23C 22/182 (2013.01); C23C 22/83 (2013.01)
Citation (search report)
See references of WO 0116397A1
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
DE 19940619 A1 20010301; AR 025396 A1 20021127; AU 6839400 A 20010326; EP 1208246 A1 20020529; JP 2003515668 A 20030507; WO 0116397 A1 20010308
DOCDB simple family (application)
DE 19940619 A 19990827; AR P000104420 A 20000825; AU 6839400 A 20000818; EP 0008069 W 20000818; EP 00956460 A 20000818; JP 2001519940 A 20000818