Gluconic acid cyanide-free gold-electroplating solution and electroplating method thereof

A gluconic acid and cyanide-free gold plating technology, applied in the field of electroplating copper and tin, can solve the problems of restricting the promotion of cyanide-free gold plating, low coating quality, poor plating solution performance, etc., and achieves excellent plating solution performance, high brightness, Good coating quality

Inactive Publication Date: 2016-04-13
无锡杨市表面处理科技有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing cyanide electroplating generally has the technical defects of poor performance of the plating solution

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
  • Gluconic acid cyanide-free gold-electroplating solution and electroplating method thereof
  • Gluconic acid cyanide-free gold-electroplating solution and electroplating method thereof
  • Gluconic acid cyanide-free gold-electroplating solution and electroplating method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The formulation of the electroplating solution is as follows:

[0033]

[0034] Plating process conditions: the pulse width of single pulse square wave current is 0.5ms, the duty cycle is 30%, and the average current density is 0.5A / dm 2 ; The pH is 6, the temperature is 60°C, and the electroplating time is 40min.

Embodiment 2

[0036] The formulation of the electroplating solution is as follows:

[0037]

[0038] Plating process conditions: the pulse width of single pulse square wave current is 0.6ms, the duty cycle is 25%, and the average current density is 0.6A / dm 2 ; The pH is 6.5, the temperature is 60°C, and the electroplating time is 35min.

Embodiment 3

[0040] The formulation of the electroplating solution is as follows:

[0041]

[0042]

[0043] Plating process conditions: the pulse width of single pulse square wave current is 0.8ms, the duty cycle is 20%, and the average current density is 1A / dm 2 ; The pH is 7, the temperature is 50° C., and the electroplating time is 20 minutes.

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 discloses a gluconic acid cyanide-free gold-electroplating solution and an electroplating method thereof. The gold-electroplating solution comprises 10-15 g/L by gold of auric chloride, 78-94 g/L by a gluconic acid group of gluconic acid or gluconate, 1-8 g/L of piperidine, and 0.16-0.48 g/L of arsenic trioxide. Gluconic acid or gluconate is taken as a complexant, a complex of piperidine and arsenic trioxide is taken as a brightener, and auric chloride is a main gold salt. The obtained gold-electroplating solution has preferable dispersion and deep electroplating performance; the cathodic current efficiency is high; and performance of the solution is excellent. Through adoption of the gold-electroplating solution in an alkaline condition, an obtained electroplated layer is low in porosity, high in brightness, and excellent in quality.

Description

technical field [0001] The invention relates to the technical field of copper-tin electroplating, in particular to an electroplating solution for cyanide-free gold plating with gluconic acid and an electroplating method thereof. Background technique [0002] Gold has good ductility, is easy to polish, has low contact resistance, good conductivity and welding performance, and has been widely used as a solderable coating in the electronics industry. Gold is resistant to high temperatures, and hard gold is relatively wear-resistant, so gold plating is widely used in precision instruments, meters, printed circuit boards, integrated circuits, tube shells, electrical contacts and other parts that require long-term stable electrical parameters. Gold has high chemical stability and is only soluble in aqua regia but not in other acids. Therefore, the gold coating has strong corrosion resistance and good anti-tarnish performance. At the same time, the gold alloy coating has various co...

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
IPC IPC(8): C25D3/48C25D5/18
Inventor 潘增炎
Owner 无锡杨市表面处理科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap