Method of joining a copper contact button to the aluminum headbar of an electrode plate
US4015099A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Feb 21, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25C7/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of joining a copper contact button to the aluminum headbar of an electrode plate used in the electrolytic industry for the recovery of nonferrous metals. The method consists in the steps of coating the copper contact button with a thin layer of silver, mechanically threading the copper contact button into the aluminum headbar, preheating the assembled copper contact button and aluminum headbar to a temperature ranging from 200.degree. to 900.degree. F, and welding the coated copper contact button to the preheated aluminum headbar. When arc welding, preheating in the temperature range 375.degree. to 475.degree. F prevents oxygen from the copper diffusing into the weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.