Method for post-treatment of electroplated steel sheets for soldering
US5011711A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2701/40
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Electroplated steel sheet suitable for soldering is provided by coating the plated steel sheet with a post-treatment solution in the range of 0.01 to 2 um in dry thickness. The post-treatment solution contains from 2 to 200 g/liter of at least one water-soluble or water-dispersed materials other than phosphoric esters, and/or from 5 to 200 g/liter of phosphoric esters, and also contains from 2 to 100 g/liter of at least one water-soluble or water-dispersable organic fluoro compound. The post-treatment solution may further contain from 0.01 to 3 g/liter of Cr.sup.6+ ion, and/or from 10 to 100 g/liter of organic amine soap. A suitable pH value of the post-treatment solution is between 3 and 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.