Process and device for manufacturing sheet metal or galvanized steel strip devoid of a pure zinc coating on at least one side
US4594272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1985 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | May 29, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention relates to a process for manufacturing a strip of hot galvanized sheet steel devoid of a coating of pure Zn or a coating based on Zn on at least one side of the strip, comprising passing the strip continuously in a conventional dipping galvanization bath, wiping by pneumatic means a part of the coating of liquid Zn deposited on the strip, and subjecting at least one side of the strip to a mechanical action for completely eliminating the coating based on zinc which is not alloyed to the iron, by allowing to subsist only a thin iron-zinc alloy layer, said mechanical action on the layer of coating based on zinc which is still liquid being exerted by means of a brush at least the bristles of which are energetically cooled. The invention also provides a cooled brushing device (10) for carrying out the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.