Patent Number: 6,480,371

Title: Alkanolamine-phosphoric acid anodizing electrolyte

Abstract: Electrolytes containing water, phosphoric acid, at least one organic solvent, and at least one alkanolamine can be used for anodizing valve metals prepared from metal powder having a surface area of least 0.35 m.sup.2 /g or 35,000 CV/g. The anodizing electrolytes have relatively high conductivity and are capable of being used at high anodizing currents. The anodic film produced by these electrolytes on valve metals is of substantially uniform thickness and has improved electrical parameters.

Inventors: Kinard; John Tony (Simpsonville, SC), Melody; Brian John (Greer, SC), Wheeler; David Alexander (Williamston, SC)

Assignee: Kemet Electronics Corporation

International Classification: C25D 11/02 (20060101); C25D 11/26 (20060101); H01G 009/145 (); H01G 035/00 ()

Expiration Date: 11/12/2019