▎ 摘　　要

NOVELTY - The contact (1) has a substrate (5) of an electrically conductive material. A graphene-copper composite coating (6) is provided on the substrate. The graphene content in the coating is within the range of 0.1 to 2 wt%. The coating is free of silver. The substrate material is or comprises copper and/or aluminum. The substrate material is copper. The graphene is in the form of sheets (7) having a thickness within the range of 1-50 nm. The sheets have a longest diameter within the range of 5-80 μ m. A pure copper coating (8) is provided on top of the composite coating. USE - Electrical contact used in contact arrangement such as power connector and switch-disconnector (all claimed). ADVANTAGE - By using a graphene composite, the corrosion resistance of copper can be greatly improved, why a less expensive graphene-copper composite coating may be used instead of silver. The composite coating provides oxidation protection for the substrate material and prevents diffusion of the substrate through the coating, also at relatively low graphene concentrations. By keeping graphene concentration low in the composite coating, the conductivity is not substantially impeded. The use of graphene in the contact reduces its friction, improves its electrical conductivity, improve its wear (e.g. arc) resistance and prolong its operational life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a contact arrangement; and a method of coating substrate for electrical contact. DESCRIPTION OF DRAWING(S) - The drawing shows a side view of an electrical contact. 1Electrical contact 5Substrate 6Graphene-copper composite coating 7Sheet 8Pure copper coating