METHOD FOR WEAR-RESISTANT COATING DEPOSITION ON PISTON SEAL SURFACE Russian patent published in 2016 - IPC C23C14/06 C23C14/24 C23C16/30 C23C16/44 

FIELD: chemistry.

SUBSTANCE: method for wear-resistant coating deposition on the surface of a cast iron or steel piston seal, at least partially, at least on its internal surface, where an intermediate layer a-C:H:X, where X is silicon, germanium, fluorine, boron, oxygen and/or nitrogen, is deposited, and there are also provided a layer (PVD-layer) containing chromium, aluminium and/or tungsten nitrides and/or carbides, applied by vapour deposition, and/or DLC-layer consisting of one or all the following layers: an adhesive layer 1.0 mcm thick or less of chromium and/or titanium, at least one metal intermediate layer a-C:H:Me, where Me is tungsten, titanium and/or chromium, or a-C:H:X, where X is silicone, germanium, fluorine, boron, oxygen and/or nitrogen, having a thickness of 0.1 mcm to 5 mcm, and a metal-free upper layer a-C:H 0.1 mcm to 5 mcm thick.

EFFECT: improving frictional properties and/or wear behaviours of at least one component of two-part oil piston seal.

4 cl