EP 1950327 A1 20080730 - Method for derusting metallic surfaces
Title (en)
Method for derusting metallic surfaces
Title (de)
Verfahren zum Entrosten von Metalloberflächen
Title (fr)
Procédé pour dérouiller des surfaces métalliques
Publication
Application
Priority
EP 07101166 A 20070125
Abstract (en)
The invention pertains to a method for derusting a metallic surface by bringing the surface in contact with an aqueous solution of a buffer having a pH between 5.1 and 6.5, wherein the buffer comprises lactic acid and the sodium, potassium and/or ammonium salt of lactic acid. A preferred combination is a lactic acid-ammonium lactate buffer.
IPC 8 full level
C23G 1/08 (2006.01); C02F 1/68 (2006.01); C02F 1/70 (2006.01); C02F 5/10 (2006.01); C23G 1/24 (2006.01); F28F 13/18 (2006.01)
CPC (source: EP)
C23G 1/088 (2013.01); C23G 1/24 (2013.01); F28F 19/00 (2013.01)
Citation (search report)
- [A] WO 2006039983 A1 20060420 - CHEMETALL GMBH [DE], et al
- [A] DE 694237 C 19400727 - VER CHEMISCHE & METALLURGISCHE
- [A] DE 742477 C 19431204 - PAUL EFFING
- [A] US 4476930 A 19841016 - WATANABE DAVID J [US]
- [A] DE 19721422 A1 19981008 - ZIMZIK HENRY [DE]
- [A] WO 0208127 A1 20020131 - RHODIA CONS SPEC LTD [GB], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK
DOCDB simple family (publication)
DOCDB simple family (application)
EP 07101166 A 20070125; EP 2008050893 W 20080125