EP 0462073 A3 19930120 - ELECTROLYTE FOR PRODUCING THIN BLACK CONVERSION LAYERS ON LIGHT METALS
Title (en)
ELECTROLYTE FOR PRODUCING THIN BLACK CONVERSION LAYERS ON LIGHT METALS
Publication
Application
Priority
DD 34163790 A 19900614
Abstract (en)
[origin: EP0462073A2] The invention relates to an ammonia-, cyanide- and fluoride-free, and consequently environmentally acceptable electrolyte which is low in pollutants and which makes it possible to produce optically black layers on light metals or their alloys with a layer thickness of < 10 mu m and with almost identical optical absorptivity and thermal emissivity by means of ANOF processes. Compared with the hitherto known conversion layers obtained by the ANOF process, these layers have a substantially lower roughness number and consequently a lower particle generation. The use of the electrolyte in the ANOF process consequently provides a version of the coating method, in particular, for constructional parts or assemblies of complicated shape whose dimensional accuracy is subject to high requirements.
IPC 1-7
IPC 8 full level
C25D 11/04 (2006.01); C25D 11/14 (2006.01)
CPC (source: EP US)
C25D 11/026 (2013.01 - EP US); C25D 11/04 (2013.01 - EP US); C25D 11/14 (2013.01 - EP US)
Citation (search report)
[A] METALLOBERFLäCHE Bd. 40, Nr. 12, Dezember 1986, Seiten 539 - 540 KURZE 'beschichten durch anodische oxidation unter funkenentladungen (anof)'
Designated contracting state (EPC)
CH FR GB LI
DOCDB simple family (publication)
EP 0462073 A2 19911218; EP 0462073 A3 19930120; EP 0462073 B1 19941130; DD 295198 B5 19960627; US 5094727 A 19920310
DOCDB simple family (application)
EP 91810453 A 19910613; DD 34163790 A 19900614; US 69162991 A 19910425