US 12,345,171 B2
Protective coatings for aircraft engine components
Simone Iurlaro, Turin (IT); Alessio Gargioli, Turin (IT); Marco Garabello, Turin (IT); Salvatore Garofalo, Turin (IT); Enrica Gilardi, Turin (IT); Ottavia Pica, Orbassano (IT); and Giuseppe Argentieri, Turin (IT)
Assigned to GE Avio S.r.l., Rivalta di Torino (IT)
Filed by GE Avio S.r.l., Rivalta di Torino (IT)
Filed on Dec. 30, 2021, as Appl. No. 17/565,592.
Claims priority of application No. 102021000024893 (IT), filed on Sep. 29, 2021.
Prior Publication US 2023/0121607 A1, Apr. 20, 2023
Int. Cl. F01D 5/28 (2006.01); B05D 7/00 (2006.01); F01D 25/24 (2006.01)
CPC F01D 25/24 (2013.01) [B05D 7/5883 (2013.01); F01D 5/288 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An aircraft engine component, comprising:
a wall comprising an aluminum alloy and/or a magnesium alloy; and
a protective coating at least partially covering a surface of the wall, the protective coating comprising:
a prime layer at least partially covering the surface of the wall, the prime layer comprising a silane coupling agent and an organic titanate;
a silicone elastomer layer at least partially covering the prime layer, the silicone elastomer layer comprising one or more filler materials dispersed in a matrix of cross-linked silicone polymers, wherein the silicone elastomer layer has a density of 0.2 g/cm3 to 0.6 g/cm3 and a Shore A hardness, when cured, of 30 to 80 according to ASTM D2240-15e1; and
an abrasion resistant layer at least partially covering the silicone elastomer layer, the abrasion resistant layer comprising a fiber-reinforced elastomeric material, wherein the abrasion resistant layer has a density of 0.9 g/cm3 to about 1.4 g/cm3 and a Shore A hardness, when cured, of 40 to 90 according to ASTM D2240-15e1.