US 12,281,406 B2
Ceramic coated iron particles and methods for making ceramic coated particles
Waynie M. Schuette, Troy, IL (US); and Patrick J. Kinlen, Fenton, MO (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by THE BOEING COMPANY, Arlington, VA (US)
Filed on Mar. 24, 2023, as Appl. No. 18/126,202.
Application 18/126,202 is a division of application No. 16/676,509, filed on Nov. 7, 2019, granted, now 11,613,624, issued on Mar. 28, 2023.
Prior Publication US 2023/0235473 A1, Jul. 27, 2023
Int. Cl. C23C 18/16 (2006.01); B22F 1/05 (2022.01); B22F 1/102 (2022.01); B22F 1/16 (2022.01); C08K 3/08 (2006.01); C08K 9/02 (2006.01); C25D 9/06 (2006.01); H01F 1/09 (2006.01)
CPC C25D 9/06 (2013.01) [B22F 1/05 (2022.01); B22F 1/102 (2022.01); B22F 1/16 (2022.01); C08K 3/08 (2013.01); C08K 9/02 (2013.01); H01F 1/09 (2013.01); B22F 2301/35 (2013.01); B22F 2302/25 (2013.01); B22F 2304/10 (2013.01); C08K 2003/0856 (2013.01); C08K 2201/005 (2013.01); C08K 2201/01 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for electrolytic deposition of a ceramic coating onto a plurality of iron particles comprising:
providing an alkaline electrolyte solution to a plating tank having one or more electrodes, wherein the alkaline electrolyte solution comprises:
water,
a hydroxide ion source, and
a fluorine source;
introducing a plurality of iron particles to a plating barrel, the plurality of iron particles having diameters ranging from about 0.5 micron to about 100 micron;
immersing the plating barrel in the plating tank, the plating barrel comprising one or more cathodes and one or more wall perforations;
applying a current to the one or more cathodes for a time to deposit a ceramic coating layer over the plurality of iron particles; and
removing the plurality of ceramic coated iron particles from the plating barrel;
wherein the one or more wall perforations of the plating barrel are sized to provide containment of the plurality of iron particles and admit the alkaline electrolyte solution of the plating tank.