Silver-graphene composite coating for sliding contact and electroplating method thereof
US11542616B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 2019 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Oct 9, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D15/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present disclosure relates to a method of electroplating of a silver-graphene composite onto a substrate. The method comprises preparing a plating bath comprising: a dissolved water soluble silver salt, dispersed graphene flakes, and an aqueous electrolyte comprising a silver complexing agent, a cationic surfactant, and a pH adjusting compound. The zeta potential of the graphene-electrolyte interface in the plating bath is adjusted to be positive and within the range of 10-30 mV by means of the cationic surfactant and the pH adjusting compound. The method also comprises applying a negative electric potential on the substrate surface such that electrophoresis of the graphene flakes occurs and said flakes are co-deposited with the silver during electroplating thereof to form a silver-graphene composite coating on the substrate surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.