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Patent Searching and Data


Title:
ALUMINUM MATERIAL
Document Type and Number:
Japanese Patent JPH08283990
Kind Code:
A
Abstract:

PURPOSE: To produce an aluminum material excellent in coating film adhesion and corrosion resistance after coating with good productivity by forming a nonporous anodic oxide film with the thickness, water content and anion content specified on the surface of the Al material.

CONSTITUTION: Al or Al alloy is pretreated to clean its surface and then electrolyzed in an electrolytic bath of boric acid, an adipate, etc., to form a nonporous anodic oxide film having 70-2000μm diameter and contg. 1-5wt.% water and 0.1-7wt.% anion on the surface. At this time, the electrolytic bath is controlled to 15-50°C, the current density to 1-20A/dm2 in DC electrolysis, the electrolyzing time to several sec to 10min and the voltage to be impressed to 5-140V. An Al material appropriately used for the electric appliance, utensil, ornament, etc., is obtained in this way.


Inventors:
YAMAGUCHI KEITARO
Application Number:
JP1995000088497
Publication Date:
October 29, 1996
Filing Date:
April 13, 1995
Export Citation:
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Assignee:
MITSUBISHI ALUMINIUM
International Classes:
C25D11/04; C22C21/00; (IPC1-7): C25D11/04; C22C21/00
Attorney, Agent or Firm:
志賀 正武 (外2名)