Corrosion inhibitors
US4104423A · kind A · utility
0Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1977 |
| Grant date | Aug 1, 1978 |
| Priority date | — |
| Expiry date | Feb 14, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Addition compounds of sulfur dioxide and Schiff bases from primary aliphatic or araliphatic amines and aromatic aldehydes can be used for the sealing of the surface of phosphated mild steel. As a result of this the corrosion resistance of the steel and the adhesion of paint coatings on the treated steel are increased substantially. The addition compounds may have three different structures depending on the components used. They can be prepared easily by passing a stream of SO.sub.2 through the solution of the Schiff base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.