Apparatus for the surface treatment of galvanized sheet-iron
US4111154A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Apr 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/265
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus for the treatment of galvanized sheet-iron emerging from a galvanization bath in order to reduce to a minimum value the size of the "minispangle" appearing on its surface comprises a housing divided into two identical casings spaced to form a vertical passage through which the sheet is caused to travel continuously, each casing comprising a spray nozzle and a pair of recovery slots disposed on either side of the nozzle, and blower means for directing an air stream loaded with zinc particles in suspension against the moving sheet surfaces so that the zinc particles will crystallize before the liquid zinc coating has set. The blower means produces the stream and recovers on its section side the previously blown air. Passages in the casings direct the air stream towards the spray nozzle and from the recovery slots.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.