CHROMIC ACID BONDED CHROMIC OXIDE AGGLOMERATES PRODUCED BY SPRAY DRYING

• US 3,585,260 A
• Filed: 07/29/1969
• Issued: 06/15/1971
• Est. Priority Date: 08/01/1967
• Status: Expired due to Term

• Current Assignee: Holker Kenneth Urmston, Rosemary Green
• Original Assignee: Holker Kenneth Urmston, Rosemary Green
• Inventors: HOLKER KENNETH URMSTON, Green, Rosemary
• Application Number:
  US04/845,898
• Time in Patent Office: 686 Days
• US Class Current: 427/433
• CPC Class Codes: C23C 4/04 characterised by the coating material
• CPC Class Codes: C23C 4/11 Oxides

Abstract

GRANULAR CHROMIUM OXIDE SUITABLE FOR PRODUCING UNIFORM, HIGH PURITY FLAME SPRAYED COATINGS IS PREPARED BY SLURRYING FINELY DIVIDED CHROMIUM OXIDE IN AQUEOUS CHROMIC ACID AND FORMING THE SLURRY INTO DRIED GRANULES BY SPRAY DRYING WHICH ARE FURTHER HEATED TO CONVERT THE CHROMIC ACID TO CHROMIC OXIDE, EITHER IN A CALCINER OR DURING THE COURSE OF FLAME OR PLASMA ARC SPRAYING.

Claims