Preparing metal for melt-coating
US5053112A · kind A · utility
13Cited by
3References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1990 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Jan 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/024
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Steel is prepared for hot-dip coating in molten zinc, by forming lead chloride on it in a greater mass (at least 12 g/m.sup.2) than possible by evaporation from saturated aqueous solution. One way of so forming the lead chloride is to cathodize the steel (24000 coulomb/m.sup.2) in 1:1 HCl saturated with lead chloride, and air-dry the steel. The steel thus prepared is dipped for 2 minutes in molten zinc or, for greater corrosion resistance, in molten scrap zinc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.