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Terminal surface electroplating liquid and application thereof

An electroplating solution and terminal technology, applied in the field of terminal surface electroplating solution, can solve the problems of complex process operability, reduced tensile strength of base metal, and inability to obtain a good electroplating surface for the workpiece, and achieves simple electroplating process and excellent physical properties. , Easy to expand the effect of production

Inactive Publication Date: 2018-03-23
JIANGSU AOGUANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of electroplating nickel are: ① It is greatly affected by the cleanliness of the substrate surface and the purity of the plating solution, resulting in many defects in the substrate after electroplating, such as peeling, blistering, pitting, black spots, etc.; The impact of different positions in the plating tank and the tool will result in poor throwing ability. In addition, the mutual shielding between the workpieces will also cause the phenomenon of yin and yang on the surface of the workpiece; ③ For workpieces with complex shapes or small deep holes or blind holes Can not get a better plating surface
[0003] The disadvantages of electroless nickel plating are: ① The coating is an amorphous layered structure. Although after heat treatment, the coating crystallizes and its layered structure gradually disappears, the tensile strength of the base metal is reduced; High cost, short life and high energy consumption; ③The bath is sensitive to impurities and requires frequent treatment, which makes the operability of the process relatively complicated

Method used

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  • Terminal surface electroplating liquid and application thereof
  • Terminal surface electroplating liquid and application thereof
  • Terminal surface electroplating liquid and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Effect of pH on coating composition and current efficiency.

[0018] The composition of the electroplating solution is as follows:

[0019] Nickel acetate 0.1mol / L, nickel chloride 0.4mol / L, glycine 0.1mol / L, ammonium chloride 0.01mol / L, potassium sulfate 0.001mol / L, β-naphthalenesulfonic acid 0.001mol / L, phenylalanine 0.002mol / L, 0.03mol / L sulfosalicylic acid, 0.02mol / L triethanolamine, 0.001mol / L pyridine-3-sulfonic acid, 0.03mol / L ammonium maleate.

[0020] Plating method:

[0021] Put the cleaned terminal into the palladium ferry solution, the current density is 0.5~6A / dm 2 , The temperature of the solution is 40°C, and the plating time is 3-8.

[0022] Electroplating effect: It can be seen from Table 1 that the electroplating effect is between pH 8.2 and 9.2.

[0023] The influence of table 1pH on coating composition and current efficiency

[0024]

Embodiment 2

[0026] The composition of the electroplating solution is as follows:

[0027] Nickel acetate 0.2mol / L, nickel chloride 0.5mol / L, glycine 0.5mol / L, ammonium chloride 0.03mol / L, potassium sulfate 0.003mol / L, β-naphthalenesulfonic acid 0.002mol / L, phenylalanine 0.003mol / L, 0.05mol / L sulfosalicylic acid, 0.03mol / L triethanolamine, 0.002mol / L pyridine-3-sulfonic acid, 0.04mol / L ammonium maleate, pH8.8.

[0028] Electroplating method: Put the cleaned terminal into the palladium solution, the current density is 0.5~6.A / dm 2 , The temperature of the liquid is 35°C, and the tank pressure is 4V.

[0029] Electroplating effect: It can be seen from Table 2 that the current density is the best when the current density is 0.5-1.0.

[0030] Table 2 Effect of current density on coating composition and current efficiency

[0031]

[0032]

Embodiment 3

[0034] The composition of the electroplating solution is as follows:

[0035] Nickel acetate 0.15mol / L, nickel chloride 0.4mol / L, glycine 0.3mol / L, ammonium chloride 0.02mol / L, potassium sulfate 0.002mol / L, β-naphthalenesulfonic acid 0.001mol / L, phenylalanine 0.002mol / L, sulfosalicylic acid 0.03mol / L, triethanolamine 0.02mol / L, pyridine-3-sulfonic acid 0.002mol / L, ammonium maleate 0.04mol / L, pH9.2,

[0036] Plating method:

[0037] Put the cleaned terminal into the palladium ferry solution with a current density of 4A / dm 2 , Transition temperature 15 ~ 40 ℃, tank pressure 4V.

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Abstract

The invention discloses terminal surface electroplating liquid. The terminal surface electroplating liquid comprises the following components of 0.1-0.2 mol / L of nickel acetate, 0.4-0.5 mol / L of nickel chloride, 0.1-0.5 mol / L of glycine, 0.01-0.03 mol / L of ammonium chloride, 0.001-0.003 mol / L of potassium sulfate, 0.001-0.002 mol / L of beta-naphthalene sulfonic acid, 0.002-0.003 mol / L of phenylalanine, a brightener, a complexing agent, the pH is 8.8-9.2, and a solvent is water. A palladium plating layer is observed under a microscope, the palladium plating layer is fine, no crack exists, and the color is uniform; and the palladium plating layer is baked for 5min at the temperature of 200 DEG C, the plating layer has no peeling and bubbling phenomenon, and the adhesion force is very good.

Description

technical field [0001] The invention belongs to the technical field of metal plating solutions, and in particular relates to a terminal surface electroplating solution and its application. Background technique [0002] Nickel has excellent decorative and functional properties, and is currently one of the most commonly used plating types. The process is divided into two different types of electroplating nickel and chemical nickel. The advantages of electroplating nickel are fine crystallization of the coating, smooth and bright, less internal stress, and strong bonding with the substrate. The disadvantages of electroplating nickel are: ① It is greatly affected by the cleanliness of the substrate surface and the purity of the plating solution, resulting in many defects in the substrate after electroplating, such as peeling, blistering, pitting, black spots, etc.; The impact of different positions in the plating tank and the tool will result in poor throwing ability. In addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12
CPCC25D3/12
Inventor 何爱芝闵宇霖沈喜训丁会梅彭红军袁小菊丁荣军
Owner JIANGSU AOGUANG ELECTRONICS
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