Method for producing zinc coated steel sheet
US5494706A · kind A · utility
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56Claims
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Key dates
| Filing date | Jun 21, 1994 |
| Grant date | Feb 27, 1996 |
| Priority date | — |
| Expiry date | Jun 21, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2/022
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing zinc coated steel sheet comprises the steps of: forming a Ni--P alloy coating layer containing P of 8 to 15 wt. % on at least one surface of a steel sheet; heat-treating the steel sheet coated with the alloy layer in a non-oxidizing atmosphere to form an Fe--Ni--P diffused alloy layer at an interface of the steel sheet and the alloy coating layer; and zinc coating the steel sheet coated with the diffused alloy layer to form a zinc coating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.