1. A surface coating on a metal deposited by electric discharge of particles from a colloidal solution.
2. A term for a broad range of industrial processes including colloidal particles suspended in a liquid medium that migrate under the influence of an electric field (electrophoresis) and which are deposited onto an electrode.

All colloidal particles that can be used to form stable suspensions and which can carry a charge, can be used in electrophoretic deposition. This includes materials such as polymers, pigments, dyes, ceramics and metals.