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Acidic semi-bright tin plating solution and preparation method thereof

A tin plating solution and bright technology, applied in the field of acidic semi-bright tin plating solution and its preparation, can solve the problems of dangerous carcinogenicity and high cost of plating solution, and achieve the effects of cheap price, good solderability of the coating, and reduced production cost

Inactive Publication Date: 2016-12-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of the methanesulfonate system plating solution is relatively high
In addition, β-naphthol is still the main additive in the current semi-bright tin plating solution, but studies have shown that this substance is a potential dangerous carcinogen, so it should be used less or not in the plating solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The components and contents of the acidic semi-bright tin plating solution in this embodiment are: 20g / L of stannous sulfate, 80mL / L of sulfuric acid, 0.1g / L of benzylidene acetone, 2mL / L of OP-10, 1.5mL / L of NP-10 , sodium benzoate 0.9g / L, niacin 0.1g / L, gelatin 1g / L, ferrous sulfate 2g / L, ascorbic acid 0.5g / L, antimony potassium tartrate 0.5g / L, and the rest are pure water.

[0019] The acidic semi-bright tin plating solution described in this example is prepared in units of 1 L, and the specific steps are as follows:

[0020] (1) Take a clean beaker, add 400 mL of pure water, take 80 mL of sulfuric acid and slowly add it to the water, and cool to room temperature.

[0021] (2) Add 20 g of stannous sulfate in step (1), and stir until completely dissolved.

[0022] (3) Take a clean 10mL graduated cylinder, add 2mL of OP-10, 1.5mL of NP-10 and 0.1g of benzylidene acetone, heat in a water bath at 58°C, wait for the benzylidene acetone to dissolve completely, and then ad...

Embodiment 2

[0035] The components and contents of the acidic semi-bright tin plating solution in the present embodiment are: 40 g / L of stannous sulfate, 110 mL / L of sulfuric acid, 0.5 g / L of benzylidene acetone, 4 mL / L of OP-10, 3 mL / L of NP-10, Sodium benzoate 1.5g / L, niacin 0.25g / L, gelatin 4g / L, ferrous sulfate 3g / L, ascorbic acid 1g / L, antimony potassium tartrate 1g / L, and the rest are pure water.

[0036] The acidic semi-bright tin plating solution described in this example is prepared in units of 1 L, and the specific steps are as follows:

[0037] (1) Take a clean beaker, add 400 mL of pure water, take 110 mL of sulfuric acid and slowly add it to the water, and cool to room temperature.

[0038] (2) Add 20 g of stannous sulfate in step (1), and stir until completely dissolved.

[0039] (3) Take a clean 10mL graduated cylinder, add 3mL of NP-10, 4mL of OP-10 and 0.5g of benzylidene acetone, heat in a water bath at 58°C, and add it to a beaker containing 100mL of pure water after th...

Embodiment 3

[0052] The components and contents of the acidic semi-bright tin plating solution in this embodiment are: 30g / L of stannous sulfate, 100mL / L of sulfuric acid, 0.3g / L of benzylidene acetone, 3mL / L of OP-10, 2.5mL / L of NP-10 , sodium benzoate 1.2g / L, niacin 0.2g / L, gelatin 2g / L, ferrous sulfate 2.5g / L, ascorbic acid 0.8g / L, antimony potassium tartrate 0.7g / L, and the rest are pure water.

[0053] The acidic semi-bright tin plating solution described in this example is prepared in units of 1 L, and the specific steps are as follows:

[0054] (1) Take a clean beaker, add 400 mL of pure water, take 100 mL of sulfuric acid and slowly add it to the water, and cool to room temperature.

[0055] (2) Add 30 g of stannous sulfate in step (1) and stir until completely dissolved.

[0056] (3) Take a clean 10mL graduated cylinder, add 2.5mL of NP-10, 3mL of OP-10 and 0.3g of benzylidene acetone, heat in a water bath at 58°C, and add it to a beaker containing 100mL of pure water after the b...

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Abstract

The invention discloses an acidic semi-bright tin plating solution and a preparation method thereof, and belongs to the field of material surface treatment. The solution disclosed by the invention comprises the following components with the following contents: 20-40g / L of stannous sulphate, 80-110mL / L of sulphuric acid, 0.1-0.5g / L of benzalacetone, 2-4mL / L of OP-10, 1.5-3mL / L of NP-10, 0.9-1.5g / L of sodium benzoate, 0.1-0.25g / L of nicotinic acid, 1-4g / L of gelatine, 2-3g / L of ferrous sulphate, 0.5-1g / L of ascorbic acid, 0.5-1g / L of antimony potassium tartrate and the balance water. The plating solution disclosed by the invention has high dispersion capacity and covering capacity, wide working temperature range and cathode current density range, high plating layer weldability, and a high binding force; and moreover, carcinogenic substances beta-naphthol and toxic aldehydes are not added, so that the plating solution is harmless to human body and environment, and capable of reducing a cost.

Description

technical field [0001] The invention relates to an acidic semi-bright tin plating solution and a preparation method thereof, belonging to the technical field of tin plating. Background technique [0002] Acid tin plating is an electroplating process developed in the 1960s. Tin plating has the advantages of low toxicity, good environmental performance, fast deposition rate, high current efficiency and good corrosion resistance, and has gradually been popularized and applied at home and abroad. According to the brightness of the coating, acid tin plating can be divided into bright coating and semi-bright coating. The latter is also known as dark tin, matte tin and matt tin. Compared with the former, semi-bright tin plating has excellent reliability. It is suitable as a solderable coating for various electronic components. Good dispersion ability, while taking into account the needs of the appearance of the assembly, can reduce the irritation of the operator's eyes due to the...

Claims

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Application Information

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IPC IPC(8): C25D3/32
CPCC25D3/32
Inventor 范云鹰支月鹏
Owner KUNMING UNIV OF SCI & TECH
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