Method of manufacturing plated steel sheet with Zn-Cr composite plating
US5421988A · kind A · utility
1Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1994 |
| Grant date | Jun 6, 1995 |
| Priority date | — |
| Expiry date | Jan 27, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D3/565
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
There is disclosed a method of manufacturing a plated steel sheet with a Zn--Cr composite plating, wherein a total of 0.01 to 300 g/l of at least one type of salt having a pH buffering action in a pH range of 2 to 6 in a bath containing only zinc are added to an acidic Zn--Cr composite plating bath containing zinc ions and trivalent chromium ions to prepare a plating bath, and plating film is formed on a steel sheet using the resultant plating bath.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.