Molten Al—Si alloy corrosion resistant composite coating and preparation method and application thereof
US11572627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2020 |
| Grant date | Feb 7, 2023 |
| Priority date | — |
| Expiry date | Aug 30, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C28/345
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The invention provides a molten Al—Si alloy corrosion resistant composite coating and a preparation method and application thereof. The composite coating layer comprises an aluminized layer and a TiO2 film layer from a surface of a substrate to the outside in sequence. The preparation method of the coating layer comprises the following steps: (step S1) making a surface treatment to an Fe-based alloy, and then aluminizing with a solid powder penetrant; (step S2) sand-blasting the aluminized Fe-based alloy; (step S3) washing and drying the Fe-based alloy which has been sand-blasted; and (step S4) depositing the TiO2 film layer on a surface of the dried aluminized Fe-based alloy by using an atom layer vapor deposition. The application of the molten Al—Si alloy corrosion resistant composite coating is used for a solar thermal power generation heat exchange tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.