Method for forming a protective coating containing aluminium and zirconium on a metal part
US8945674B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2009 |
| Grant date | Feb 3, 2015 |
| Priority date | — |
| Expiry date | Jan 23, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for forming a protective coating containing aluminum and zirconium on the surface of a metal part. The part is put into contact with a cement made of aluminum alloy, at a treatment temperature, with an atmosphere containing an active gas which reacts with the cement to form a gaseous aluminum halide, which decomposes in contact with the part depositing metallic aluminum thereon, the active gas containing ZrOCl2 that decomposes in contact with the part depositing Zr metal thereon, and being formed by vaporizing granules of ZrOCl2 that are solid at ambient temperature. The part, the cement, and ZrOCl2 granules are then progressively heated together in a chamber from ambient temperature to the treatment temperature with a plateau at 400° C.±200° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.