Electroplating bath and method for the electrodeposition of bright aluminum coatings
US4032413A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1975 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Nov 12, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/44
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention provides an electroplating bath and a method for the electrodeposition of bright aluminum coatings on metals and conductive materials with aprotic oxygen- and water-free, organo-aluminum electrolytes which contain as a brightener at least one additive with at least one sulfonamide, sulfonimide and/or carbimide group. Particularly suitable brighteners are o-benzoic acid sulfonimide, N-benzoylbenzenesulfonamide and the reaction products of o-benzoic acid sulfonimide or N-benzoylbenzenesulfonamide with aluminum triethyl. Using the method, a fast-adhering and corrosion-resistant bright aluminum coating is obtained which finds use for decorative purposes and, generally, for corrosion protection in surface finishing, e.g., also as mirrors and reflectors for light and heat radiators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.