Process for control of electrodeposition utilizing cathodic and anodic flushable electrodes
US5827416A · kind A · utility
Inventors
Key dates
| Filing date | Sep 26, 1996 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Sep 26, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D13/24
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process of controlling an ionic electrodeposition coating system is provided for a applying coating solution, which contains a solubilizer and ionic coating particles, to an object. A first flushable, tubular electrode is placed into the tank that is electrically charged and that is accessible by the solution through a correspondingly charged membrane. A second flushable, tubular electrode is also placed into the tank that is electrically charged corresponding to the first electrode and that is accessible by the solution through an oppositely charged membrane. The object to be coated is then supplied with an electrical charge, and the electrodes are supplied with an opposite electrical charge. The application of electrical current causes a portion of the ionic coating particles to be attracted to and deposited upon the object, and also causes a release of excess cations and anions. The ions that have a charge corresponding to the charge of the object are removed at the first electrode by allowing the ions to pass through its charged membrane. Further, the ions that have a charge opposite to the charge of the object are surprisingly attracted to the like-charged second electrode a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.