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Imidazole-sulfosalicylic acid silver plating solution and electroplating method

A technology of sulfosalicylic acid and electroplating solution, which is applied in the field of silver plating technology, can solve the problems of poor discoloration resistance of the plating layer, insufficient stability of the plating solution, and unsatisfactory weldability, and achieve good stability, discoloration resistance and reliability. Strong weldability effect

Inactive Publication Date: 2015-05-13
WUXI XUEJIANG ENVIRONMENT ENG EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing imidazole-sulfosalicylic acid silver plating electroplating solution has the technical defects that the plating solution is not stable enough, the coating has poor discoloration resistance and weldability is not ideal enough

Method used

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  • Imidazole-sulfosalicylic acid silver plating solution and electroplating method
  • Imidazole-sulfosalicylic acid silver plating solution and electroplating method
  • Imidazole-sulfosalicylic acid silver plating solution and electroplating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The formula of imidazole-sulfosalicylic acid silver plating electroplating solution is as follows:

[0036]

[0037]

[0038] Plating process conditions: forward pulse width is 1ms, forward duty cycle is 20%, forward average current density is 0.2A / dm 2 , the negative pulse width is 1ms, the negative duty cycle is 20%, and the negative average current density is 0.1A / dm 2 ; The pH is 8, the temperature is 15°C, and the electroplating time is 40min.

Embodiment 2

[0040] The formula of imidazole-sulfosalicylic acid silver plating electroplating solution is as follows:

[0041]

[0042] Plating process conditions: forward pulse width is 1ms, forward duty cycle is 15%, forward average current density is 0.25A / dm 2 , the negative pulse width is 1.5ms, the negative duty cycle is 15%, and the negative average current density is 0.15A / dm 2 ; The pH is 9, the temperature is 20° C., and the electroplating time is 50 minutes.

Embodiment 3

[0044] The formula of imidazole-sulfosalicylic acid silver plating electroplating solution is as follows:

[0045]

[0046]

[0047] Plating process conditions: forward pulse width is 2ms, forward duty cycle is 10%, forward average current density is 0.3A / dm 2 , the negative pulse width is 2ms, the negative duty cycle is 10%, and the negative average current density is 0.2A / dm 2 ; The pH is 9.5, the temperature is 30°C, and the electroplating time is 60min.

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PUM

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Abstract

The invention discloses an imidazole- sulfosalicylic acid silver plating solution and an electroplating method. The imidazole- sulfosalicylic acid silver plating solution comprises the following components by content: 30-40g / L silver nitrate, 135-145g / L sulfosalicylic acid, 135-145g / L imidazole, 35-45g / L acetate, 35-45g / L carbonate and 0.070-0.116g / L 2,2'-dipyridyl and 0.034-0.045g / L thiosulfate. According to the invention, 2,2'-dipyridyl and thiosulfate are taken as a brightener, usage amount of components of silver nitrate, sulfosalicylic acid and imidazole is optimized, plating solution has good stability, and an electroplating layer has strong anti-tarnish property and weldability.

Description

technical field [0001] The invention relates to the technical field of silver plating technology, in particular to an imidazole-sulfosalicylic acid silver plating solution and method. Background technique [0002] Metal silver has become one of the most widely used precious metals due to its excellent performance and relatively low cost. Silver has the best electrical conductivity among all metals, and its ductility ranks second among all metals. In addition, silver also has good thermal conductivity, light reflection, corrosion resistance and welding performance, so it is in great demand in industrial fields such as electronics and communications. In addition, because of its unique silver-white metallic luster, silver has been used as a decorative layer on handicrafts such as household high-end utensils, tableware and jewelry. However, silver is a precious metal after all, and its actual application cost is relatively high, and its content in the earth's crust is only 1×l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/46C25D5/12C25D5/18
Inventor 曾雄燕
Owner WUXI XUEJIANG ENVIRONMENT ENG EQUIP
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