Method for applying aluminum alloy coatings for corrosion protection of steel
US9194039B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2012 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Mar 15, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C14/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Depositing pure aluminum and aluminum alloy coatings onto substrates using directed vapor deposition (DVD) method is presented herein. The aluminum alloys have decreased environmental impact both due to their composition and due to the use of DVD process with no hazardous precursors or waste. Corrosion resistance of DVD deposited aluminum and aluminum alloys is effective for protection of steel substrates. The invention includes the use of the DVD technique to apply aluminum and/or aluminum alloy coatings effective for corrosion protection; the use of plasma-activated DVD to enhance the density of aluminum and aluminum alloy coatings deposited at low substrate temperatures; the use of multi-source evaporation to control composition of aluminum alloys during DVD deposition; the application of aluminum and/or aluminum alloy coatings onto NLOS substrates can be used for corrosion protection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.