US 9,809,712 B2
Hydrophobic and oleophobic coatings
Deepak Kumar, Houston, TX (US); and Zhiyue Xu, Cypress, TX (US)
Assigned to BAKER HUGHES, a GE COMPANY, LLC, Houston, TX (US)
Filed by Deepak Kumar, Houston, TX (US); and Zhiyue Xu, Cypress, TX (US)
Filed on Nov. 26, 2013, as Appl. No. 14/90,047.
Prior Publication US 2015/0147523 A1, May 28, 2015
Int. Cl. C09D 1/00 (2006.01); C23C 16/30 (2006.01); C23C 16/26 (2006.01); C23C 16/02 (2006.01)
CPC C09D 1/00 (2013.01) [C23C 16/0227 (2013.01); C23C 16/0254 (2013.01); C23C 16/26 (2013.01); C23C 16/30 (2013.01); Y10T 428/24355 (2015.01); Y10T 428/30 (2015.01)] 20 Claims
OG exemplary drawing
1. A hydrophobic surface comprising a surface texture and a coating disposed on the surface texture, wherein the coating comprises a first layer disposed directly on the surface texture and a second layer disposed on the first layer, the first layer comprising a conforming material and the second layer comprising an amorphous diamond like carbon material doped with 25 to 35 atomic percent of a dopant comprising a combination of Si and O or a combination of Si, O, and F, the diamond like carbon material comprising 60 to 90 atomic percent of sp2 bonded carbon and 10 to 40 atomic percent of sp3 bonded carbon; and the conforming material comprising polytetrafluoroethylene, fluorinated ethylene propylene, perfluoroalkoxy, polyvinylidene fluoride, polydimethylsiloxane, polyphenylene sulfide, metal-polytetrafluoroethylene composites, or a combination comprising at least one of the foregoing; and wherein the surface texture comprises a micro texture, a micro-nano texture, or a combination of a micro texture and a micro-nano texture; and the coating has a scratch hardness of greater than 100 ksi, determined according to ASTM standard D7027-05 (2009) using a micro-scratch tester.