Tin-plated bismuth alloy solution and preparation method thereof

A bismuth alloy and solution technology, which is applied in the field of tin-plated bismuth alloy solution and its preparation, can solve the problems of easy oxidation and decomposition of tin-plated bismuth alloy solution, the influence of production cycle and material consumption, and short service life, so as to promote uniform deposition, Satisfied solderability and dense coating

Inactive Publication Date: 2020-05-22
大连长丰实业总公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The factory has the production capacity of tin-bismuth plating, and the configured tin-bismuth alloy solution is easy to oxidize and decompose, unstable, and has a short service life. The bismuth content detection has also been unqualified, which has a serious impact on the production cycle and material consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Present embodiment provides a kind of tin-bismuth alloy solution, and described solution formula is stannous sulfate (SnSO 4 ), sulfuric acid (H 2 SO 4 ), bismuth nitrate [Bi(NO 3 ) 3 ·5H 2 O], sodium chloride (NaCl), OP-10 (polyoxyethylene octylphenol ether-10), phenolsulfonic acid, hydroquinone and gelatin; solvent is deionized water;

[0032] Described sulfuric acid adopts the concentrated sulfuric acid of 98%, and the content of sulfuric acid is 130g / L;

[0033] Described stannous sulfate, sodium chloride and OP-10 all adopt common content, and the content of stannous sulfate is 40g / L; The content of sodium chloride is 0.8g / L; The content of OP-10 is 5g / L;

[0034] The content of described phenolsulfonic acid is 15g / L;

[0035] The content of said hydroquinone is 0.5g / L;

[0036] The content of the gelatin is 1g / L;

[0037] The content of described bismuth nitrate is 1.5g / L;

[0038] The preparation method of described tin-plated bismuth alloy solution is a...

Embodiment 2

[0067] Present embodiment provides a kind of tin-bismuth alloy solution, and described solution formula is stannous sulfate (SnSO 4 ), sulfuric acid (H 2 SO 4 ), bismuth nitrate [Bi(NO 3 ) 3 ·5H 2 O], sodium chloride (NaCl), OP-10 (polyoxyethylene octylphenol ether-10), phenolsulfonic acid, hydroquinone and gelatin; solvent is deionized water;

[0068] Described sulfuric acid adopts the concentrated sulfuric acid of 98%, and the content of sulfuric acid is 150g / L;

[0069] Described stannous sulfate, sodium chloride and OP-10 all adopt common content, and the content of stannous sulfate is 60g / L; The content of sodium chloride is 0.3g / L; The content of OP-10 is 3g / L;

[0070] The content of described phenolsulfonic acid is 20g / L;

[0071] The content of said hydroquinone is 0.8g / L;

[0072] The content of the gelatin is 0.5g / L;

[0073] The content of described bismuth nitrate is 0.8g / L;

[0074] The preparation method of described tin-plated bismuth alloy solution is...

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PUM

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Abstract

The invention discloses a tin-plated bismuth alloy solution and a preparation method of the tin-plated bismuth alloy solution. The formula of the solution comprises 40-60g/L of stannous sulfate, 130-150g/L of sulfuric acid, 0.8-1.5g/L of bismuth nitrate, 0.3-0.8g/L of sodium chloride, 3-5g/L of OP-10, 15-20g/L of phenolsulfonic acid, 0.5-0.8g/L of hydroquinone and 0.5-1g/L of gelatin, and deionized water serves as a solvent. By means of the preparation method of the tin-plated bismuth alloy solution, the anti-oxidation performance and quality stability of the tin-plated bismuth alloy solutioncan be effectively improved, and it is ensured that a plating layer always comprises 0.2-2wt% of bismuth.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, and in particular relates to a tin-bismuth alloy solution and a preparation method thereof. Background technique [0002] Tin tends to become "gray tin" with poor strength below -10°C, and the transformation speed is the largest at -48°C, and tin-plated tin is prone to whiskers. The tin-bismuth alloy coating obtained by co-depositing tin and a small amount of bismuth can be Effectively prevent the generation of "grey tin" and whiskers, tin-bismuth alloy can solve this problem. [0003] In the acidic tin plating solution, the main salt of stannite is divalent tin, and the main salt of divalent tin compound exists in the form of water and divalent tin, and tin is easily oxidized by oxygen in the air to Tetravalent tin and divalent tin are also easily electrolytically oxidized by the anode, and are prone to turbidity, because the tin salt is hydrolyzed into Sn(OH) 2 , Sn(OH) 4 The collo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/60
CPCC25D3/60
Inventor 李成龙辛洪弋邹宇洁
Owner 大连长丰实业总公司
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