Title:
【発明の名称】陽極酸化アルミニウム表面の電解金属塩染色
Document Type and Number:
Japanese Patent JP2916168
Kind Code:
B2
Abstract:
The invention relates to a process for electrolytically colouring anodised surfaces of aluminium and aluminium alloys with metal salts, wherein a defined oxide layer is first produced by means of direct current in acidic solution and this is then coloured by means of an alternating current or an alternating current with superposed direct current, using an acidic electrolyte containing tin(II) salts. The subject of the invention is the addition of water-soluble compounds of the general formulae (I) to (IV) which stabilise tin(II) salts
where R1 is hydrogen, alkyl, aryl, alkylaryl, alkylarylsulphonic acid, alkyl sulphonic acid and alkali metal salts thereof, each having 1 to 22 carbon atoms, R2 is hydrogen, alkyl, aryl, alkylaryl, alkylarylsulphonic acid, alkylsulphonic acid and alkali metal salts thereof, each having 1 to 22 carbon atoms, R3 represents one or more hydrogen atoms and/or alkyl, aryl or alkylaryl radicals having 1 to 22 carbon atoms and R4 and R5 represent one or more hydrogen atoms, alkyl, aryl and/or alkylaryl radicals, sulphonic acid, alkylsulphonic acid, alkylarylsulphonic acid and alkali metal salts thereof having 1 to 22 carbon atoms, at least one of the radicals R1, R2 and R3 being a radical other than hydrogen.
Inventors:
DEIITAA BURODAARA
YURUGEN RINDENAA
ROOTO DE RIIZEEMEEYAA
BIIRI BYUUSUTO
KURISUTEIINE SHUREEDAA
BIIRI BUUFUMAIYAA
YURUGEN FUEERU
YURUGEN RINDENAA
ROOTO DE RIIZEEMEEYAA
BIIRI BYUUSUTO
KURISUTEIINE SHUREEDAA
BIIRI BUUFUMAIYAA
YURUGEN FUEERU
Application Number:
JP18723689A
Publication Date:
July 05, 1999
Filing Date:
July 19, 1989
Export Citation:
Assignee:
HENKERU KG AUFU AKUCHEN
International Classes:
C25D11/22; C25D11/12; (IPC1-7): C25D11/22
Domestic Patent References:
| JP4830637A | ||||
| JP58113391A | ||||
| JP5429850A |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)