Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cyanide-free white copper tin electroplating solution and preparation method thereof

A preparation method and electroplating solution technology are applied in the field of cyanide-free cupronickel tin electroplating solution and its preparation, and can solve the problems of poor electroplating quality, instability of the electroplating solution, inability to realize mass production and application, etc.

Inactive Publication Date: 2018-06-26
临海市伟星化学科技有限公司
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The developed cyanide-free copper-tin alloys include pyrophosphoric acid-stannate process and citrate copper plating process, but the plating solutions used in these processes are unstable, and the plating quality is poor, such as washing resistance, salt spray resistance and appearance. Dirty and other issues, unable to achieve mass production applications
Therefore, the actual batch production application in the electroplating industry is still a cyanide-containing plating solution, and the cyanide-free electroplating has not been truly realized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Cyanide-free white copper tin electroplating solution and preparation method thereof
  • Cyanide-free white copper tin electroplating solution and preparation method thereof
  • Cyanide-free white copper tin electroplating solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] 1.1 Plating solution preparation

[0059] raw material:

[0060] Complexing agent Polymerized potassium ammonium thiocyanate (m=2, n=2) 122g / L, polymerized cuprous thiocyanate (m=2, n=2) 17g / L, polymerized zinc thiocyanate (m=1 , n=2) 2.2g / L, potassium stannate 38g / L, potassium hydroxide 9g / L, water as solvent.

[0061] Preparation:

[0062] Add complexing agent to water accounting for 50% of the total water volume, heat up to 50°C, stir and dissolve evenly, add zinc salt, stir while adding until zinc salt is completely dissolved, then add copper salt, stir while adding until copper salt Completely dissolve to obtain the main solution; add potassium hydroxide and potassium stannate to the obtained main solution, stir well, add the remaining water to the full amount, filter with activated carbon adsorption, and obtain the electroplating solution (PH value is 13.5).

[0063] 1.2 Electroplating test

[0064] (1) Hull cell test:

[0065] Add 250mL electroplating soluti...

Embodiment 2

[0079] 1.1 Plating solution preparation

[0080] raw material:

[0081] Complexing agent polymerized potassium ammonium thiocyanate (m=20, n=20) 128g / L, polymerized cuprous thiocyanate (m=20, n=20) 17.5g / L, polymerized zinc thiocyanate (m= 10, n=20) 2.5g / L, potassium stannate 40g / L, potassium hydroxide 9.5g / L, water as solvent.

[0082] Preparation:

[0083] Add complexing agent to water accounting for 50% of the total water volume, heat up to 50°C, stir and dissolve evenly, add zinc salt, stir while adding until zinc salt is completely dissolved, then add copper salt, stir while adding until copper salt Completely dissolve to obtain the main solution; add potassium hydroxide and potassium stannate to the obtained main solution, stir well, add the remaining water to the full amount, filter with activated carbon adsorption, and obtain the electroplating solution (PH value is 13.5).

[0084] 1.2 Electroplating test

[0085] (1) Hull cell test:

[0086] Add 250mL electroplat...

Embodiment 3

[0092] 1.1 Plating solution preparation

[0093] raw material:

[0094] Complexing agent polymerized potassium ammonium thiocyanate (m=30, n=30) 130g / L, polymerized cuprous thiocyanate (m=30, n=30) 20g / L, polymerized zinc thiocyanate (m=15 , n=30) 3g / L, potassium stannate 50g / L, potassium hydroxide 12g / L, and water as a solvent.

[0095] Preparation:

[0096] Add complexing agent to water accounting for 50% of the total water volume, heat up to 50°C, stir and dissolve evenly, add zinc salt, stir while adding until zinc salt is completely dissolved, then add copper salt, stir while adding until copper salt Completely dissolve to obtain the main solution; add potassium hydroxide and potassium stannate to the obtained main solution, stir well, add the remaining water to the full amount, filter with activated carbon adsorption, and obtain the electroplating solution (PH value is 13.5).

[0097] 1.2 Electroplating test

[0098] (1) Hull cell test:

[0099] Add 250mL electropla...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a cyanide-free white copper tin electroplating solution and a preparation method thereof. The cyanide-free white copper tin electroplating solution provided by the invention isprepared from solvation water and the following components in content by volume: 120 to 130 g / L of complexing agent, 16 to 20 g / L of thiocyanate organic copper salt, 2 to 3 g / L of thiocyanate organiczinc salt, 30 to 50 g / L of potassium stannate and 8 to 12 g / L of potassium hydroxide, wherein the complexing agent is poly ammonium potassium thiocyanate and the general formula is (NH2K)mC2nN2n+1SOnHn+3, wherein n is greater than or equal to 1 and smaller than or equal to 50, and m is greater than or equal to 1 and smaller than or equal to 50. According to the preparation method of the cyanide-free white copper tin electroplating solution, the poly ammonium potassium thiocyanate is selected as the complexing agent and is matched with the thiocyanate organic copper salt, the thiocyanate organic zinc salt, the potassium stannate and the potassium hydroxide according to certain proportions to form water soluble liquid, and thereby a cyanide-free electroplating solution is obtained; in addition, the electroplating solution can produce excellent electroplating effects, so that an electroplating product has the advantages of excellent water resistance, salt fog resistance and pure white appearance.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a cyanide-free cupronickel-tin electroplating solution and a preparation method thereof. Background technique [0002] Electroplating is the process of plating a thin layer of other metals or alloys on the surface of certain metals using the principle of electrolysis. It uses electrolysis to attach a layer of metal film to the surface of metal or other material parts. As a complexing agent for complex electroplating solutions, cyanide is an important raw material in the electroplating industry and is widely used in countries all over the world. However, cyanide is a highly toxic chemical, and the discharge of electroplating solutions containing cyanide will cause serious pollution to the environment. In this regard, countries around the world have successively issued treatment plans and stipulated emission standards. The ultimate goal is to eliminate cyanide plating. . ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/56
CPCC25D3/56
Inventor 徐友撑郑崇统
Owner 临海市伟星化学科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com