COATINGS FOR TURBINE PARTS

1 . A coating for axially rotating machine part that in use is subject to water laden gas, the coating having a metal matrix comprising polysiloxane filler distributed throughout a thickness of the coating.

2 . The coating of claim 1 wherein the particles are homogenously distributed throughout the thickness of the coating.

3 . The coating of claim 1 wherein the metal matrix comprises Nickel or alloys thereof.

4 . The coating of claim 1 wherein the filler has the form of particles.

5 . The coating of claim 6 wherein the particles have a size distribution as measured by laser diffraction of d10=0.37 micrometres, D50=1.07 micrometres and D90=2.31 micrometres.

6 . The coating of claim 1 wherein the filler comprises between 5 to 50 volume % of the coating.

7 . The coating of claim 1 wherein the filler comprises between 25 to 45 volume % of the coating, more preferably between 35 to 45 volume % of the coating.

8 . The coating of claim 1 comprising a corrosion resistance inner layer free of the filler and the metal matrix forms an outer layer of the coating.

9 . The coating of claim 1 wherein the part is an airfoil of a steam turbine.

10 . The coating of claim 1 wherein the part is an airfoil of a gas compressor or of a gas turbine.

11 . A method for coating a part for an axially rotating machine with an erosion resilience and coating, the method comprising:

providing a part of an axially rotating machine;

coating the part with a coating comprising a metal matrix with a polysiloxane filler distributed throughout a thickness of the metal matrix; and

stoving the filler to as to change the temperature resistance of the polysiloxane filler.

12 . The method of claim 11 wherein the stoving is performed before the step of coating of the part.

13 . The method of claim 11 wherein the stoving step is performed after the coating step.

14 . The method of claim 11 wherein the method of coating includes electrolytic nickel plating and/or electroless chemical coating.