US 12,129,554 B2
Bi-layer protective coatings for metal components
Duncan Bews, Balcatta (AU); Robert Smith, Balcatta (AU); and Evelyn Ng, Balcatta (AU)
Assigned to Callidus Process Solutions Pty Ltd., Balcatta (AU)
Appl. No. 17/778,485
Filed by Callidus Process Solutions Pty Ltd, Balcatta (AU)
PCT Filed Nov. 6, 2020, PCT No. PCT/IB2020/060444
§ 371(c)(1), (2) Date May 20, 2022,
PCT Pub. No. WO2021/099873, PCT Pub. Date May 27, 2021.
Claims priority of application No. 2019904402 (AU), filed on Nov. 21, 2019.
Prior Publication US 2023/0002911 A1, Jan. 5, 2023
Int. Cl. C23C 28/00 (2006.01); B32B 15/04 (2006.01); B32B 15/16 (2006.01); B32B 18/00 (2006.01); C23C 4/02 (2006.01); C23C 4/10 (2016.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 4/137 (2016.01); C23C 4/18 (2006.01); C23C 16/06 (2006.01); C23C 30/00 (2006.01); C25D 3/66 (2006.01); F01D 5/28 (2006.01); F01D 25/00 (2006.01); F16K 25/00 (2006.01); F16K 47/00 (2006.01)
CPC C23C 28/322 (2013.01) [B32B 15/04 (2013.01); B32B 15/043 (2013.01); B32B 15/16 (2013.01); B32B 18/00 (2013.01); C23C 4/02 (2013.01); C23C 4/10 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); C23C 4/137 (2016.01); C23C 4/18 (2013.01); C23C 16/06 (2013.01); C23C 28/32 (2013.01); C23C 28/321 (2013.01); C23C 28/3215 (2013.01); C23C 28/324 (2013.01); C23C 28/34 (2013.01); C23C 28/341 (2013.01); C23C 28/345 (2013.01); C23C 28/3455 (2013.01); C23C 28/347 (2013.01); C23C 30/00 (2013.01); C23C 30/005 (2013.01); C25D 3/66 (2013.01); F01D 5/28 (2013.01); F01D 5/282 (2013.01); F01D 5/284 (2013.01); F01D 5/288 (2013.01); F01D 25/005 (2013.01); F16K 25/005 (2013.01); F16K 47/00 (2013.01); Y10T 428/12576 (2015.01); Y10T 428/12597 (2015.01); Y10T 428/12604 (2015.01); Y10T 428/12611 (2015.01); Y10T 428/12618 (2015.01); Y10T 428/1266 (2015.01); Y10T 428/12667 (2015.01); Y10T 428/12771 (2015.01); Y10T 428/12785 (2015.01); Y10T 428/12806 (2015.01); Y10T 428/12812 (2015.01); Y10T 428/12819 (2015.01); Y10T 428/12826 (2015.01); Y10T 428/1284 (2015.01); Y10T 428/12861 (2015.01); Y10T 428/12868 (2015.01); Y10T 428/12931 (2015.01); Y10T 428/12937 (2015.01); Y10T 428/12944 (2015.01); Y10T 428/12951 (2015.01); Y10T 428/12972 (2015.01); Y10T 428/12979 (2015.01); Y10T 428/12993 (2015.01)] 6 Claims
OG exemplary drawing
 
1. A bi-layer coating on a substrate of a metal component, the bi-layer coating comprising:
a first layer that is metallurgically fused to the substrate and which comprises one or more of zirconium, vanadium, niobium, and tantalum; and
a second layer that is mechanically bonded to the first layer and which comprises one or more oxides of titanium, chromium, or silicon, or one or more carbides of tungsten or chrome, wherein the metal component comprises a valve trim part of a ball valve for use in a corrosive environment of a high-pressure acid leaching (HPAL) or pressure oxidation (POX) hydrometallurgical process.