Production of galvanized steel strip
US4143184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1977 |
| Grant date | Mar 6, 1979 |
| Priority date | — |
| Expiry date | Mar 30, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/024
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Steel strip is first heated to a predetermined temperature suitable for imparting desired properties to the strip and is then immersed in an aqueous bath maintained at substantially its boiling temperature. The composition of the aqueous bath is preferably adjusted to ensure the formation of an oxide film on the entire surface of the strip. After the strip has been withdrawn from the bath, oxide is eliminated from at least part of the surface of the strip, e.g., from one or both faces, by removal of the oxide or by reduction of the oxide. Simultaneously or subsequently, the strip is heated to a given temperature, e.g., 420.degree.-550.degree. C., maintained at this temperature, and immersed at this temperature in molten zinc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.