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Cyanide-free electroplating nano-silver additive

An additive and nano-silver technology, applied in the field of electroplating additives, to achieve the effect of high efficiency, strong stability and good bright effect

Active Publication Date: 2020-08-25
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The glossiness of the silver plating layer obtained by the cyanide-free bright silver plating solution mentioned in patent CN201710738117.3 is only 110Gu

Method used

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  • Cyanide-free electroplating nano-silver additive
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  • Cyanide-free electroplating nano-silver additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of sodium hydroxide solution to adjust the pH value to 10.5; (3) Add to the container Add 3 g ammonium dodecylsulfonate, 3 g sodium dodecylbenzenesulfonate and 3 g sodium dodecylsulfate, stir and dissolve; (4) add 35 g gamma-butene to the container Amide, 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polyglutarimide-1000, stirred and dissolved; (5 ) Then add 5 g of aminopyrimidine, 2 g of 4-acetylaminopyrimidine, and 3 g of sulfadiazine into the container, stir and dissolve; (6) add 1.85 g of sulfathiazole thioglycolic acid, 0.3 g of sulfathiazole thioethanolamine and 0.35 g of pyridinium propanesulfonate were dissolved in 150 mL of pure water, poured into the container, and stirred to mix evenly; (7) Added pure water to 1 L. The nano-silver additive for cyanide-free...

Embodiment 2

[0022] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of potassium hydroxide solution to adjust the pH value to 10.8; (3) Add to the container Add 3 g ammonium dodecylsulfonate, 3 g sodium dodecylbenzenesulfonate and 4 g sodium dodecylsulfate, stir and dissolve; (4) add 35 g gamma-butene to the container Amide, 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polyglutalimide-1000, stir and dissolve; (5) Add 5 g of aminopyrimidine, 3 g of 4-acetylaminopyrimidine, and 2 g of sulfadiazine into the container, stir and dissolve; (6) Mix 1.85 g of sulfathiazole thioglycolic acid, 0.35 g of sulfathiazole thioethanolamine, and Dissolve pyridinium propanesulfonate in 150 mL of pure water, pour it into a container, and stir to make it evenly mixed; (7) Add pure water to 1L.

Embodiment 3

[0024] The preparation process of nano-silver additive for cyanide-free electroplating: (1) Add 700 mL of pure water to a container with a volume of 1 L; (2) Add an appropriate amount of sodium hydroxide solution to adjust the pH value to 10.5; (3) Add to the container Add 4 g ammonium dodecylsulfonate, 3 g sodium dodecylbenzenesulfonate and 3 g sodium dodecyl sulfate, stir and dissolve; (4) add 35 g gamma-butene to the container Amide, 15 g δ-pentenyl lactam, 10 g phthalimide, 10 g polybutene imide-1000, 10 g polyglutalimide-1000, stir and dissolve; (5) Then add 5 g of aminopyrimidine, 2 g of 4-acetylaminopyrimidine, and 3 g of sulfadiazine into the container, stir and dissolve; (6) add 1.5 g of sulfathiazole thioglycolic acid, 0.35 g of sulfathiazole thioethanolamine, and Dissolve pyridinium propanesulfonate in 150 mL of pure water, pour it into a container, and stir to make it evenly mixed; (7) Add pure water to 1L.

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Abstract

The invention provides a cyanide-free electroplating nano-silver additive. The additive per liter comprises 60-80 g of main brightener, 10-20 g of auxiliary brightener, 5-10 g of surface wetting agentand 1-3 g of protection agent, wherein the main brightener is composed of 25%-50% of gamma-butene lactam, 10%-15% of polybutene diimide, 15%-35% of delta-pentene lactam, 10%-15% of polypentylene diimide and 10%-15% of phthalimide. The additive can effectively improve the brightness and discoloration resistance of a coating and can achieve a high brightness and crystal grain refining effect at room temperature, the coating brightness can reach 600 Gu or more, crystal grains can be refined to be in nanoscale, stability is high, an excellent brightening effect can still be achieved after long-time electroplating operation or standing, the production cost is low, the efficiency is high, and environmental protection is achieved.

Description

technical field [0001] The invention relates to a nano-silver additive for cyanide-free electroplating, aimed at an additive used in electroplating silver under direct current or pulse conditions in a cyanide-free plating solution, and specifically belongs to the technical field of electroplating additives. Background technique [0002] With the improvement of people's living standards and the development of science and technology, people's demand and requirements for silver-plated parts are also increasing day by day. Industrial production of silver plating generally adopts electroplating methods. At present, the mainstream electroplating silver systems contain cyanide, and cyanide is often highly toxic. With the increasing awareness of environmental protection and safety, cyanide electroplating has gradually been eliminated. However, no matter what the electroplating conditions are, it is difficult to obtain a dense and bright plating layer without any additives, and dendr...

Claims

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Application Information

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IPC IPC(8): C25D3/46
CPCC25D3/46
Inventor 刘光明甘鸿禹唐荣茂熊义刘永强刘欢欢官宇
Owner NANCHANG HANGKONG UNIVERSITY
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