Metal coating

1. Coated object comprising at least

(a) a metal layer,

(b) a coupling layer,

(c) an inner polymer layer, and

(d) a substrate surface

wherein the coupling layer (b) is arranged between layers (a) and (c) and connects said layers, the polymer layer (c) comprises a microstructure and is arranged on the substrate surface (d), the coupling layer (b) and the metal layer (a) follow the microstructure of polymer layer (c), and the sum of the diameters of layers (a) and (b) is between 5 and 500 nm,

wherein the coated object is produced by a method comprising the following steps:

(A) providing an object with at least polymer layer (c),

(B) activating the polymer layer (c),

(C) applying the coupling layer (b) to the polymer layer (c), and

(D) applying the metal layer (a) to the coupling layer (b),

wherein steps (B) to (D) are carried out by a plasma treatment,

wherein the thickness of the metal layer is between 2 nm and 400 nm, and

wherein the contact temperature of the polymer surface is set so to be lower than 390 Kelvin.

2. Object according to claim 1 , wherein the metal layer (a) comprises cobalt, copper, tungsten, molybdenum or chromium.

3. Object according to claim 1 , wherein the coupling layer (b) comprises a metal oxide.

4. Object according to claim 1 , wherein the polymer layer (c) comprises a polyurethane, polyacrylate, polymethacrylate, polyepoxide, polysilicone or a copolymer thereof.

5. Object according to claim 1 , wherein the microstructure is a riblet structure or a self-cleaning microstructure.

6. Object according to claim 1 , wherein the metal layer (a) comprises conductive structures.

7. Object according to claim 1 , wherein a cover layer (a0) is also provided on the metal layer (a), wherein said cover layer (a0) is applied to the metal layer (a) by a plasma treatment.

8. Object according to claim 1 , wherein the object is an aircraft, motor vehicle, train, ship, wind turbine, pipe portion or a component thereof.

9. Object according to claim 1 , wherein the polymer layer (c) comprises an activated surface structure before the coupling layer (b) is applied.

10. Object according to claim 1 , wherein the polymer layer (c) comprises reactive groups at the polymer backbone.

11. Object according to claim 3 , wherein the metal oxide is selected from titanium oxides, silicon oxide or a combination of titanium oxide and silicon oxide.

12. Object according to claim 1 , wherein the layer thickness of the coupling layer is between 5 nm and 200 nm.

13. Object according to claim 1 , wherein layer (a) is an outer layer.

14. Object according to claim 7 , wherein layer (a0) is an outer layer.

15. A method for producing an object according to claim 1 , comprising the following steps:

(A) providing an object with at least a polymer layer (c),

(B) activating the polymer layer (c),

(C) applying the coupling layer (b) to the polymer layer (c), and

(D) applying the metal layer (a) to the coupling layer (b),

wherein steps (B) to (D) are carried out by a plasma treatment, wherein before step (A) a substrate surface (d) of the object is provided with the polymer layer (c) in a step (A0) and, wherein after step (A0) and before step (A) the polymer layer is provided with a microstructure in a step (A1).

16. The method for producing an object according to claim 15 , further comprising:

(E) applying a cover layer (a0) to the metal layer (a) by a plasma treatment.

17. The method according to claim 15 , wherein the object is an aircraft, motor vehicle, train, ship, wind turbine, pipe portion or a component thereof.