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A kind of electroplating solution and electroplating method for electrodepositing Invar alloy with alkaline solution of ferric iron system

A technology of alkaline solution and Invar alloy, which is applied in the field of electrodeposited alloys, can solve the problems of poor stability of electroplating solution and insufficient overpotential of electrodeposition, and achieve the effects of good stability, low cost and simple operation

Inactive Publication Date: 2017-08-08
XIAMEN UNIV
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Problems solved by technology

[0005] In order to solve the problems of poor electroplating solution stability and insufficient electrodeposition overpotential in the existing electrodeposition Invar alloy electroplating process, the object of the present invention is to provide a kind of electroplating solution with good stability, smooth and dense electrodeposited layer, and more Electroplating solution and electroplating method suitable for actual production of electrodeposited invar alloy

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  • A kind of electroplating solution and electroplating method for electrodepositing Invar alloy with alkaline solution of ferric iron system
  • A kind of electroplating solution and electroplating method for electrodepositing Invar alloy with alkaline solution of ferric iron system
  • A kind of electroplating solution and electroplating method for electrodepositing Invar alloy with alkaline solution of ferric iron system

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Embodiment Construction

[0044] The specific preparation process of the electroplating solution is (take the preparation of one liter as an example):

[0045] ① Accurately weigh the primary complexing agent (120-180g), secondary complexing agent (30-60g), buffer (20-40g), add 500-600mL deionized water, stir and dissolve evenly;

[0046] ② Add ferric salt (15-45g) to ① and stir to dissolve evenly;

[0047] ③ Add nickel salt (25-65g) to ② and stir to dissolve evenly;

[0048] ④Continue to add 0.1-5.0g of additives and 1-20mg of wetting agent to ③ and stir to dissolve evenly;

[0049] ⑤ with 10% NaOH solution and 10% H 2 SO 4 The pH value of the solution was adjusted to be in the range of 8.5-11.5.

[0050] ⑥ Add an appropriate amount of deionized water to a volume of 1 L and stir well.

[0051] The process of using the electroplating solution is:

[0052] Pour the above prepared electroplating solution into the plating tank, heat to 40-65°C, use nickel plate or Invar alloy plate (Invar 36) as anod...

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Abstract

The invention discloses an electroplating solution and method for electrically depositing invar alloy in a ferric iron system alkaline solution, belongs to the field of alloy electro-deposition and relates to an electroplating process of invar alloy electro-deposition. Electroplating solution composition and electroplating process parameters are involved in the method. The invar alloy belongs to iron-based high-nickel alloy and generally contains 32-36 wt% (mass fraction) of nickel. An alkaline solution system containing ferric iron salt and a mixed complexing agent is adopted and combined with a specific electroplating process condition, so that the invar alloy with the specific nickel content range is obtained in an electroplating manner. The electroplating solution comprises ferric iron salt, nickel salt, a mixed complexing agent, a buffering agent, an addition agent and a wetting agent. According to the electroplating process parameters, temperature ranges from 40 DEG C to 65 DEG C, a pH value ranges from 8.5 to 11.5, current density ranges from 1.0 A / dm<2> to 12.0 A / dm<2>, and air stirring or mechanical stirring is adopted as a stirring manner. An invar alloy coating with the uniform thickness being 0.1-10 micrometers and the nickel content being 34-36% can be obtained in an electroplating manner, and appearance is smooth and glossy.

Description

technical field [0001] The invention relates to an electroplating process for electrodepositing Invar alloys, including electroplating solution composition and electroplating process parameters, and belongs to the field of electrodeposited alloys. Background technique [0002] Invar alloy belongs to iron-based high-nickel alloy, which usually contains 32-36wt.% nickel. Due to its ferromagnetism, its expansion coefficient is extremely low in a certain temperature range, so it is widely used in precision instruments and other industries. [0003] At present, the preparation methods of Invar alloy mainly include melting casting, vacuum evaporation, mechanical rolling and so on. Compared with the above methods, the preparation of Invar alloy by electrodeposition has the advantages of high precision, controllable alloy composition and thickness, and can form a film on the surface of complex parts. It can be applied to MEMS (micro-electromechanical system) ultra-precision machinin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/56C25D5/00
CPCC25D3/562C25D5/00
Inventor 杨防祖黄先杰闫慧黄帅帅田中群周绍民
Owner XIAMEN UNIV
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