EP 0185192 A3 19870225 - PROCESS FOR THE HARD ANODIZING OF ALUMINIUM CAST PARTS PRODUCED BY VACUUM CASTING
Title (en)
PROCESS FOR THE HARD ANODIZING OF ALUMINIUM CAST PARTS PRODUCED BY VACUUM CASTING
Publication
Application
Priority
DE 3442591 A 19841122
Abstract (en)
[origin: EP0185192A2] 1. Process for hard anodizing of cast aluminium parts produced in the vacuum die-casting process, with a silicon content of more than 5% as well as a strontium content of 0.005 to 0.08% and/or a sodium content of 0.003 to 0.2%, characterized in that the castings are subjected before the anodizing, which is carried out by the direct current sulphuric acid or direct current sulphuric acid oxalic acid process, to an annealing at temperatures of 400 to 480 degrees C for a period of 3 to 20 minutes.
IPC 1-7
IPC 8 full level
C22C 21/02 (2006.01); C22F 1/043 (2006.01); C25D 11/06 (2006.01); C25D 11/16 (2006.01)
CPC (source: EP)
C22F 1/043 (2013.01); C25D 11/16 (2013.01)
Citation (search report)
- [Y] DE 1191116 B 19650415 - VER DEUTSCHE METALLWERKE AG
- [Y] GB 1121677 A 19680731 - PECHINEY PROD CHIMIQUES SA
- [A] DE 3518408 A1 19851128 - SUMITOMO LIGHT METAL IND [JP], et al
- [Y] METAL FINISHING ABSTRACTS, Band 22, Nr. 4, Juli/August 1980, Seiten 268-269; & JP-A-54 102 251 (MATSUSHITA) 31.01.1978
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0185192 A2 19860625; EP 0185192 A3 19870225; EP 0185192 B1 19900228; AT E50604 T1 19900315; DE 3442591 A1 19860522; DE 3442591 C2 19930715; DE 3576176 D1 19900405
DOCDB simple family (application)
EP 85114290 A 19851109; AT 85114290 T 19851109; DE 3442591 A 19841122; DE 3576176 T 19851109