The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 27, 1990
Filed:
Apr. 19, 1989
Setsuko Takahashi, Misato, JP;
Nisshin Steel Co., Ltd., Tokyo, JP;
Mitsubishi Petrochemical Co., Ltd., Tokyo, JP;
Abstract
In the plating for electrodeposition of aluminum using a mixed molten salt bath comprising an aluminum halide and a quaternary ammonium salt, the mixed molten salt bath comprises from 20 to 80 mol % of the aluminum halide and from 20 to 80 mol % of a 1-alkyl- or 1,3-dialkylimidazolium halide, provided that the alkyl group has 1 to 12 carbon atoms, by the use of which the plating can be carried out at a high current density of not less than 30 A/dm.sup.2 without generation of burnt deposits, which has been difficult to carry out using the conventional molten salt bath. Addition of a halide of an alkali metal or alkaline earth metal, or an organic solvent, to the above plating bath can improve conductivity and also enhance uniform electrodeposition performance.