Corrosion-resistant terminal material, corrosion-resistant terminal, and wire-end structure

Patent metadata

Field	Value
Publication number	US-10910130-B2
Application number	US-201816488288-A
Country	US
Kind code	B2
Filing date	Mar 6, 2018
Priority date	Mar 7, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A corrosion-resistant terminal material has a substrate made of copper or a copper alloy and a film layered on the substrate. The film has a planned core wire contact part with which a core wire of an electric wire is in contact when the material is formed to a terminal and a planned contact part. The film formed in the planned core wire contact part has a tin layer made of tin or tin alloy and a metallic zinc layer formed on the tin layer; the film formed in the planned contact part has a tin layer made of tin or tin alloy but does not have a metallic zinc layer. A corrosion-resistant terminal uses the corrosion-resistant terminal material described herein.

First claim

The invention claimed is:

1. A corrosion-resistant terminal material comprising a substrate made of copper or a copper alloy and a film layered on the substrate, wherein
a planned core wire contact part which is in contact with a core wire of an electric wire when a terminal is formed and a planned contact part to be a contact part are formed;
the film formed in the planned core wire contact part has a tin layer made of tin or a tin alloy and a metallic zinc layer formed on the tin layer; and
the film formed in the planned contact part has a tin layer made of tin or a tin alloy but does not have the metallic zinc layer.

2. The corrosion-resistant terminal material according to claim 1 , wherein the tin layer in the planned core wire contact part is formed on a zinc-nickel alloy layer containing zinc and nickel.

3. The corrosion-resistant terminal material according to claim 2 , wherein the zinc-nickel alloy layer has a nickel content percentage not less than 5% by mass and not more than 35% by mass.

4. The corrosion-resistant terminal material according to claim 1 , wherein the metallic zinc layer has a coating rate not less than 30% and not more than 80% to a surface after being formed as the terminal.

5. The corrosion-resistant terminal material according to claim 1 , wherein the metallic zinc layer has a zinc density not less than 5 at % and not more than 40 at %, and a thickness in terms of SiO 2 not less than 1 nm and not more than 10 nm.

6. The corrosion-resistant terminal material according to claim 1 , wherein the tin alloy of which the tin layer in the planned core wire contact part consists contains zinc not less than 0.4% by mass and not more than 15% by mass.

7. The corrosion-resistant terminal material according to claim 1 , wherein a surface of the substrate is covered with a ground layer made of nickel or a nickel alloy.

8. The corrosion-resistant terminal material according to claim 1 , wherein being formed in a belt sheet shape, and to a carrier along a longitudinal direction thereof, terminal members having the planned core wire contact part and the planned contact part are coupled, with intervals along a longitudinal direction of the carrier.

9. A corrosion-resistant terminal formed from the corrosion-resistant terminal material according to claim 1 .

10. A wire-end structure wherein the corrosion-resistant terminal according to claim 9 is crimped to an end of the electric wire made of aluminum or an aluminum alloy.

11. A corrosion-resistant terminal material comprising a substrate made of copper or a copper alloy and a film layered on the substrate, wherein
the film comprising a planned core wire contact part which is in contact with a core wire of an electric wire when a terminal is formed and a planned contact part to be a contact part are formed;
the planned core wire contact part consisting of a tin layer made of tin or a tin alloy and a metallic zinc layer formed on the tin layer; and
the planned contact part consisting of a tin layer made of tin or a tin alloy but does not have the metallic zinc layer.

12. The corrosion-resistant terminal material according to claim 2 , wherein the planned contact part does not exist a zinc-nickel alloy layer containing zinc and nickel under the tin layer.

Assignees

• Mitsubishi Materials Corp

Inventors

• Kubota Kenji
• Tarutani Yoshie
• Nakaya Kiyotaka

Classifications

• H01R13/03 Primary

  characterised by the material, e.g. plating, or coating materials · CPC title

• H01R4/62

  Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors (H01R4/68 takes precedence) · CPC title

• H01R4/18

  by crimping {(H01R4/01, H01R4/2495 take precedence; for coaxial cables H01R9/0518)} · CPC title

• C25D7/00

  Electroplating characterised by the article coated · CPC title

• H01B7/2806 Primary

  Protection against damage caused by corrosion · CPC title