Durability of adhesively bonded aluminum structures and method for inhibiting the conversion of aluminum oxide to aluminum hydroxide
US4308079A · kind A · utility
51Cited by
3References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1980 |
| Grant date | Dec 29, 1981 |
| Priority date | — |
| Expiry date | Jun 16, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31515
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
It has been found that hydration of aluminum oxide surface coatings to aluminum hydroxide may be curtailed by the presence of corrosion inhibiting amounts of amino phosphonate compounds. Effective inhibitors, such as nitrilotris (methylene) triphosphonic acid, may be applied to aluminum substrates having aluminum oxide surfaces thereupon in concentrations of less than 50% by weight in aqueous solution, and suitably from 1 to about 500 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.