Tin-plated copper terminal material, terminal, and wire terminal part structure
A tinned copper and terminal technology, applied in circuits, contact parts, electrical components, etc., can solve the problems of hydroxide layer defect, low continuity, electrical corrosion, etc., to achieve inhibition of electrical corrosion, long-term excellent corrosion resistance, The effect of suppressing the rise in resistance value
Active Publication Date: 2018-07-31
MITSUBISHI MATERIALS CORP
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Problems solved by technology
When this tin-plated copper terminal material is crimped to an aluminum wire, tin and aluminum are less prone to galvanic corrosion due to their similar corrosion potentials, but if salt water, etc. adheres to the crimped part, galvanic corrosion will occur
[0018] At this time, even if Sn is provided as in Patent Document 4 3 o 2 (OH) 2 In the case of the hydroxide layer, when exposed to a corrosive environment or a heating environment, defects are rapidly generated in the hydroxide layer, so there is a problem of low durability.
In addition, when a Sn-Zn alloy is laminated on the Sn-Cu alloy layer as in Patent Document 5, and the outermost layer has a zinc-concentrated layer, there is a possibility that the copper in the Sn-Cu alloy layer is exposed due to poor productivity of the Sn-Zn alloy plating. The problem that the anti-corrosion effect on aluminum wire will be lost when it is applied to the surface layer
Method used
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[0072] After the base copper plate is degreased and pickled, nickel plating, zinc-nickel alloy plating, and tin plating are sequentially applied as the base layer. The respective plating conditions were as follows, and the nickel content of the galvanized nickel alloy was adjusted by changing the ratio of nickel sulfate hexahydrate and zinc sulfate heptahydrate. The zinc-nickel alloy plating conditions described below are examples in which the nickel content is 15% by mass. In addition, the sample 9 was not subjected to zinc-nickel alloy plating, but nickel plating and tin plating were performed sequentially after degreasing and pickling the copper plate. In samples 1 to 4, nickel plating as a base layer was not performed. As samples in which nickel alloy plating was applied to the base layer, sample 6 was subjected to nickel-tungsten plating, sample 8 was subjected to nickel-phosphorus plating, and sample 10 was subjected to nickel-iron plating.
[0073]
[0074] ·Plating...
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Abstract
On a substrate 2 made of copper or a copper alloy, a zinc-nickel alloy layer 4 containing zinc and nickel, and a tin layer 5 made of a tin alloy are laminated in this order, wherein the zinc-nickel alloy layer 4 has a thickness of 0.1-5 [mu]m and has a nickel content of 5-50 mass%, the tin layer 5 has a zinc concentration of 0.6-15 mass%, and, under an oxide layer 6 which is the outermost layer, ametal zinc layer 7, having a zinc concentration of 5-40 at% and a thickness of 1-10 nm in terms of SiO2, is formed on the tin layer 5.
Description
technical field [0001] The present invention relates to a tin-plated copper terminal material, a terminal made of the same, and an electric wire terminal structure using the same It is used and plated with tin or tin alloy on the surface of copper or copper alloy substrate. [0002] The present invention claims priority based on Japanese Patent Application No. 2015-232465 filed on November 27, 2015 and Japanese Patent Application No. 2016-66515 filed on March 29, 2016, and the contents thereof are incorporated herein. Background technique [0003] Conventionally, the electric wire is connected to the device by crimping a terminal made of copper or copper alloy on the end portion of the wire made of copper or copper alloy and connecting the terminal to a terminal provided on the device. Furthermore, in order to reduce the weight of the electric wire, etc., the electric wire may be composed of aluminum or an aluminum alloy instead of copper or copper alloy. [0004] For exam...
Claims
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IPC IPC(8): H01R13/03C22C18/00C22C19/03C25D5/10C25D5/50C25D7/00H01R4/62
CPCC25D7/00C22C18/00C22C19/03H01R4/62H01R13/03C25D5/12C25D5/14C25D5/505C22C13/00C25D3/562C25D3/12C25D3/22C25D3/32H01R4/185
Inventor 久保田贤治樽谷圭荣中矢清隆
Owner MITSUBISHI MATERIALS CORP