US 12,292,012 B2
Oxidation protection layer for engine pistons made of steel or an iron-based alloy
Margrit Dannenfeldt, Nuremberg (DE); Wolfram Cromme, Burgthann (DE); and Jurgen Reitenspies, Altdorf bei Nurnberg (DE)
Assigned to Federal-Mogul Numberg GmbH, Nuremberg (DE)
Appl. No. 18/697,476
Filed by FEDERAL-MOGUL NURNBERG GMBH, Nuremberg (DE)
PCT Filed Sep. 21, 2022, PCT No. PCT/EP2022/076178
§ 371(c)(1), (2) Date Mar. 31, 2024,
PCT Pub. No. WO2023/052215, PCT Pub. Date Apr. 6, 2023.
Claims priority of application No. 10 2021 210 995.0 (DE), filed on Sep. 30, 2021.
Prior Publication US 2024/0401544 A1, Dec. 5, 2024
Int. Cl. F02F 3/00 (2006.01); C23C 24/08 (2006.01); F02F 3/10 (2006.01)
CPC F02F 3/10 (2013.01) [C23C 24/085 (2013.01); F02F 2200/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A piston for an internal combustion engine, which at least in part has a layer,
wherein the layer is obtained from a composition comprising at least one titanate or zirconate of formula (I):

OG Complex Work Unit Chemistry
wherein R1, R2, R3 and R4 each independently represent H or a phenyl group; M represents Ti or Zr; and n represents an integer; and
wherein the layer contains at least one metal pigment.