Wire pickling apparatus
US4951694A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 1990 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23G3/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Novel pickling method and apparatus are described. A plurality of parallel side-by-side laterally-spaced wires is passed horizontally from end to end of an enclosed pickling zone and are countercurrently contacted by a wave of hot hydrochloric acid pickling liquor formed by a hydraulic jump and passing through the pickling zone submerging the wires. The pickling zone is enclosed at the sides and top and bottom by solid walls and at the ends by water curtains which prevent the egress of fumes of hydrochloric acid. The pickling zone is followed by a washing zone in the same enclosure as the pickling zone comprising further water curtains and wiper bars. The side walls of the enclosure include depending side walls from an upper enclosure portion and upwardly-opening channels at the upper extremity of side walls of a lower portion into which the depending side walls extend below water baths located in the channels to seal the side walls but permit wires to be restrung.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.