Methods for applying a coating over laser marking
US9808829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2015 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Sep 4, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05D2202/25
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Coatings for filling cracks within anodic films formed from, for example, a laser marking process are described. The cracks generally have widths of nanometers in scale and can extend from an external surface of an anodic film to an underlying metal substrate. The coatings fill the cracks to prevent liquid and contaminants from entering the cracks and reaching the metal substrate, thereby preventing corrosion of the underlying metal substrate. The coatings can be hydrophobic such that water is wicked away from the cracks. In some cases, the coatings are fluoropolymer coatings. Methods include spray-on techniques that provide a thin and uniform layer of the coating. The spray-on technique can be configured to spray on a fluoropolymer precursor onto the anodic film such that the fluoropolymer precursor diffuses into and polymerizes into the fluoropolymer coating within the cracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.