Magnesium containing protective coating for ferrous metal
US4083726A · kind A · utility
3Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | May 28, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/226
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A coating for protecting steel from corrosion is a mixture of an organic solvent and binder, powdered magnesium, and a passivating agent which has a pH greater than about 8 when in contact with water. Steel covered with the coating is cut or welded by the application of heat sufficient to melt the magnesium and underlying steel. In some embodiments, the pyrolysis products of the coating create an odor which warns of the build-up of nitrogen oxides produced by typical welding and coating operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.