Title:
SEALING OF ANODIC OXIDIZED FILM OF ALUMINUM
Document Type and Number:
Japanese Patent JPS5959896
Kind Code:
A
Abstract:
PURPOSE:To obtain easily an anodic oxidized Al film with superior corrosion resistance, by treating an Al material having a formed anodic oxidized film in an aqueous soln. of a soluble alkali silicate having a specified molar ratio to seal the pores in the oxidized film. CONSTITUTION:An anodic oxidized film is formed on an Al or Al alloy material, and the material is treated in an aqueous soln. of a water soluble alkali silicate such as sodium silicate having 2.7-3.5 molar ratio to seal the pores in the oxidized film. The concn. of the alkali silicate in the soln. is 0.4-3%. The preferred treatment temp. is >=50 deg.C, and the treatment is carried out by a conventional method. An anodic oxidized film with superior alkali resistance is obtd. easily, uniformly and stably.
Inventors:
SATOU TOSHIHIKO
Application Number:
JP16764082A
Publication Date:
April 05, 1984
Filing Date:
September 28, 1982
Export Citation:
Assignee:
NIPPON LIGHT METAL CO
International Classes:
C25D11/18; C25D11/24; (IPC1-7): C25D11/18
Domestic Patent References:
| JPS5112983A | 1976-01-31 | |||
| JPS5736998A | 1982-02-27 |