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Tin and copper carbon nanotube composite coating of automobile terminal, electroplating liquid and electroplating method for tin and copper carbon nanotube composite coating of automobile terminal

A carbon nanotube composite and carbon nanotube technology, which is applied in the field of preparation of tin-copper carbon nanotube composite coating for automobile terminals, can solve the problems of increased insertion and extraction force, assembly difficulty, etc. cost effect

Active Publication Date: 2015-12-16
HENAN THB ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a kind of tin-copper carbon nanotube composite coating, electroplating solution and electroplating method for automobile terminals in view of the problems existing in the prior art, which solves the problem that the insertion and extraction force of automobile terminals increases after tinning Too large and difficult to assemble, reducing the electroplating process and coating thickness, reducing the cost while reducing the insertion force, improving the protection performance of the terminal and the ability to resist zinc diffusion to the discoloration of the coating

Method used

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  • Tin and copper carbon nanotube composite coating of automobile terminal, electroplating liquid and electroplating method for tin and copper carbon nanotube composite coating of automobile terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A kind of electroplating solution that the tin-copper carbon nanotube composite coating of automobile terminal adopts, formula is as follows: stannous sulfate 25g / L, copper sulfate 5g / L, citric acid 45g / L, tartaric acid 40g / L, 98% sulfuric acid 95mL / L, 2-mercaptobenzimidazole 0.6mg / L, sodium dodecylsulfonate 0.05g / L, carbon nanotube 1.5g / L.

[0020] A kind of electroplating method of tin-copper carbon nanotube composite coating of automobile terminal, the steps are as follows:

[0021] (1) Add deionized water to the cleaned plating tank, slowly add 98% sulfuric acid, add stannous sulfate, copper sulfate, citric acid, tartaric acid and 2-mercaptobenzimidazole after the solution is cooled to 25°C, and Stir continuously to dissolve and form solution A;

[0022] (2) Add sodium lauryl sulfate and carbon nanotubes into deionized water, and disperse them by ultrasonic waves for 8 minutes to form solution B;

[0023] (3) Add solution B to solution A, hang the tin anode and th...

Embodiment 2

[0026] A kind of electroplating solution that tin-copper carbon nanotube composite coating of automobile terminal adopts, formula is as follows: tin protosulfate 35g / L, copper sulfate 1g / L, citric acid 55g / L, tartaric acid 30g / L, 98% sulfuric acid 105mL / L, 2-mercaptobenzimidazole 0.1mg / L, sodium dodecylsulfonate 0.2g / L, carbon nanotube 0.5g / L.

[0027] A kind of electroplating method of tin-copper carbon nanotube composite coating of automobile terminal, the steps are as follows:

[0028] (1) Add deionized water to the cleaned plating tank, slowly add 98% sulfuric acid, add stannous sulfate, copper sulfate, citric acid, tartaric acid and 2-mercaptobenzimidazole after the solution is cooled to 35°C, and Stir continuously to dissolve and form solution A;

[0029] (2) Add sodium lauryl sulfate and carbon nanotubes into deionized water, and disperse them by ultrasonic waves for 15 minutes to form solution B;

[0030] (3) Add solution B to solution A. At this time, if the total a...

Embodiment 3

[0033] A kind of electroplating solution that the tin-copper carbon nanotube composite coating of automobile terminal adopts, formula is as follows: tin protosulfate 30g / L, copper sulfate 3g / L, citric acid 50g / L, tartaric acid 35g / L, 98% sulfuric acid 100mL / L, 2-mercaptobenzimidazole 0.4mg / L, sodium dodecylsulfonate 0.1g / L, carbon nanotube 1g / L.

[0034] A kind of electroplating method of tin-copper carbon nanotube composite coating of automobile terminal, the steps are as follows:

[0035] (1) Add 60L of deionized water to the cleaned plating tank, slowly add 98% sulfuric acid, add 30g stannous sulfate, 3g / copper sulfate, 50g citric acid, 35g tartaric acid and 0.4mg2 -Mercaptobenzimidazole, and constantly stirring makes the dissolution be made into solution A;

[0036] (2) Add 0.1g of sodium lauryl sulfate and 1g of carbon nanotubes into 5L of deionized water, and disperse them by ultrasonic waves for 10 minutes to form solution B;

[0037] (3) Add solution B to solution A,...

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Abstract

The invention discloses a tin and copper carbon nanotube composite coating of an automobile terminal, electroplating liquid and an electroplating method for the tin and copper carbon nanotube composite coating of the automobile terminal. The thickness of the coating is 0.5 micrometers, and the coating is prepared from, by mass, 1-3% of copper, 0.2-0.8% of carbon nanotube and the balance tin. The electroplating liquid is prepared from 30 g / L of tin sulfate, 3 g / L of copper sulfate, 50 g / L of citric acid, 35 g / L of tartaric acid, 100 mL / L of 98% sulfuric acid, 0.4 mg / L of 2-mercapto benzimidazole, 0.1g / L of sodium dodecyl sulfate and 1g / L of carbon nanotube. The treated automobile terminal is electroplated for 8-12 minutes in the electroplating liquid at 25 DEG C with the cathode-current density of 3 A / dm<2> and the rolling speed of 8 turns per minute. The problems that the plugging force of the automobile terminal obtained after tin plating is increased too much and assembling is difficult are solved, and the electroplating processes and the thickness of the coating are reduced; and while the cost is reduced, the plugging force is reduced, the protection performance of the terminal is improved, and the capability of resisting zinc diffusion which causes color changing of the coating is improved.

Description

technical field [0001] The invention belongs to the technical field of automobile terminal preparation, and in particular relates to a method for preparing a tin-copper carbon nanotube composite coating of an automobile terminal. Background technique [0002] Automobile terminals are mainly made of brass or bronze materials, which are easy to oxidize and discolor in humid or high temperature environments. The contact resistance increases and affects the conductivity of the terminals. Tin protective layer with strong ability and good conductivity, the brass substrate needs to be pre-plated with 0.5 micron copper or nickel coating to prevent the diffusion of zinc in the brass substrate from discoloring the tin coating. However, due to the low hardness of the tin coating and the large friction coefficient, the insertion and withdrawal force of the electroplating terminal is improved while the terminal protection ability is improved, which leads to the difficulty of assembly of ...

Claims

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Application Information

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IPC IPC(8): C25D3/60
Inventor 赵平堂张景堂覃洪张献军
Owner HENAN THB ELECTRIC
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