Cable with improved corrosion resistance

Abstract

An electric cable is providing having at least one elongated electrically conducting element containing a plurality of electrically conducting strands and at least one fluorinated polymer layer surrounding said elongated electrically conducting element, said cable further comprising a metallic layer comprising nickel interposed between the elongated electrically conducting element and the fluorinated polymer layer, and a method of manufacturing said cable.

Claims

1. An electric cable comprising: at least one elongated electrically conducting element containing a plurality of electrically conducting strands, and at least one fluorinated polymer layer surrounding said elongated electrically conducting element, wherein said cable further comprises a metallic layer comprising nickel interposed between the elongated electrically conducting element and the fluorinated polymer layer, said metallic layer comprising nickel surrounding the plurality of electrically conducting strands.

2. The electric cable according to claim 1, wherein the metallic layer comprising nickel comprises at least 50 wt % of nickel relative to the total weight of the metallic layer comprising nickel.

3. The electric cable according to claim 1, wherein the metallic layer comprising nickel has a thickness from 10 μm to 2 mm.

4. The electric cable according to claim 1, wherein the metallic layer comprising nickel is directly in physical contact with the elongated electrically conducting element.

5. The electric cable according to claim 1, wherein the metallic layer comprising nickel is obtained by chemical deposition of nickel, by electrolytic deposition of nickel, or by application of tape comprising nickel.

6. The electric cable according to claim 1, wherein the fluorinated polymer layer comprises at least one fluorinated polymer.

7. The electric cable according to claim 1, wherein the fluorinated polymer layer comprises at least one fluorinated polymer selected from all the polymers comprising tetrafluoroethylene as monomer, polytetrafluoroethylene (PTFE), poly(tetrafluoroethylene-co-hexafluoropropylene) (FEP), the copolymer perfluoro(alkylvinylether)/tetrafluoroethylene (PFA), poly(ethylene-co-tetrafluoroethylene) (ETFE), and a mixture thereof.

8. The electric cable according to claim 1, wherein the fluorinated polymer layer is an electrically insulating layer.

9. The electric cable according to claim 1, wherein the elongated electrically conducting element comprises a central electrically conducting strand, at least one first layer of electrically conducting strands surrounding said central electrically conducting strand, and preferably at least one second layer of electrically conducting strands surrounding said first layer of electrically conducting strands.

10. The electric cable according to claim 1, wherein the metallic layer comprising nickel is a solid layer.

11. The electric cable according to claim 1, wherein the elongated electrically conducting element is non-composite or non organic.

12. The electric cable according to claim 1, wherein said electric cable further comprises at least one first fluorinated semiconducting layer, said first fluorinated semiconducting layer being interposed between the metallic layer comprising nickel and the fluorinated polymer layer.

13. A Method of manufacturing an electric cable as defined in claim 1, wherein said method comprises at least the following steps: i) making said elongated electrically conducting element comprising a plurality of electrically conducting strands, ii) depositing the metallic layer comprising nickel, and iii) applying the fluorinated polymer layer.

14. The method of manufacturing an electric cable according to claim 13, characterized in that step ii) is carried out by chemical deposition of nickel, by electrolytic deposition of nickel, or by application of tape comprising nickel, around the elongated electrically conducting element.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0110] The appended drawings illustrate the invention:

[0111] FIG. 1 shows a cross-sectional view of a cable according to one embodiment of the invention.

[0112] For clarity, only the elements essential for understanding the invention are shown schematically, without being to scale.

DETAILED DESCRIPTION

[0113] FIG. 1 shows a cross-sectional view of a cable 1 according to the invention.

[0114] In FIG. 1, the electric cable la comprises a central elongated electrically conducting element comprising a central electrically conducting strand 2a, a first layer comprising six electrically conducting strands 3a surrounding said central electrically conducting strand 2a, and a second layer comprising twelve electrically conducting strands 4a surrounding said first layer. The central elongated electrically conducting element is surrounded by a metallic layer comprising nickel 5a, and said metallic layer comprising nickel 5a is surrounded by a fluorinated polymer layer 6a.