Method of manufacturing an electrode for a surge arrester, electrode and surge arrester
A method for manufacturing of an electrode of a surge arrester, an electrode and a surge arrester are disclosed. In an embodiment, the method includes positioning an electrode body in an electrochemical cell with and an electrolyte solution for a nickel deposition. The electrolyte solution includes at least one or more of magnesium sulphate, sodium sulphate and sodium chloride and electrolytically coating the electrode body with a coating to form the electrode for the surge arrester. The coating has nickel and the electrolyte solution is configured such that a surface of the coating includes a reduced wettability.
1. An electrode for a surge arrester, comprising:
an electrode body; and
a coating being electrically conductive, wherein the coating comprises nickel and an additive,
wherein the coating has a surface with a reduced wettability,
wherein the additive comprises sulphur, which effects the reduced wettability of the surface of the coating for a solder, and
wherein the sulphur of the additive is present in the surface of the coating between 0.05 and 0.2 weight percent based on a total weight of the coating.
2. The electrode according to claim 1 , wherein the coating is an electrolytically deposited layer.
3. The electrode according to claim 1 , wherein the additive further comprises chlorine.
4. The electrode according to claim 3 , wherein the chlorine of the additive is present in the surface of the coating between 0.1 and 0.3 weight percent based on a total weight of the coating.
5. The electrode according to claim 1 , wherein the solder is a hard solder.
6. The electrode according to claim 1 , wherein a contact angle formed by the solder at a temperature of 800° C. on the surface of the coating is greater than a contact angle of the solder formed on a nickel surface not comprising the additive.
7. The electrode according to claim 1 , wherein the coating is free of Cu.
8. A surge arrester comprising the electrode according to claim 1 .
9. A surge arrester electrode, comprising:
an electrode body; and
a coating being electrically conductive,
wherein the coating comprises nickel and an additive,
wherein the coating has a surface with a reduced wettability when the surge arrester electrode is soldered to a surge arrester insulator,
wherein the additive comprises sulphur and/or chlorine,
wherein, when the additive comprises sulphur, the sulphur is present in the surface of the coating between 0.05 and 0.2 weight percent based on a total weight of the coating, and
wherein, when the additive comprises chlorine, the chlorine is present in the surface of the coating between 0.1 and 0.3 weight percent based on a total weight of the coating.
10. The surge arrester electrode according to claim 9 , wherein the additive comprises sulphur and chlorine.
11. An electrode for a surge arrester comprising:
an electrode body; and
a coating being electrically conductive, wherein the coating comprises nickel and an additive,
wherein the coating has a surface with a reduced wettability,
wherein the additive comprises chlorine, which effects the reduced wettability of the surface of the coating for a solder, and
wherein the chlorine of the additive is present in the surface of the coating between 0.1 and 0.3 weight percent based on a total weight of the coating.
12. The electrode according to claim 11 , wherein the additive further comprises sulphur.
13. The electrode according to claim 12 , wherein the sulphur of the additive is present in the surface of the coating between 0.05 and 0.2 weight percent based on a total weight of the coating.