Multi-coordination-agent cyanide-free electrogilding liquid and electrogilding process
A gold electroplating and multi-coordination technology, applied in the field of gold electroplating, can solve the problems of popularization and application limitations, and achieve the effects of high current efficiency, wide range of current density, excellent bath performance and coating performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
specific Embodiment approach 1
[0017] Specific embodiment one: The multi-coordinating agent cyanide-free electroplating gold plating solution in this embodiment uses hydantoin derivatives as the main complexing agent, and weighs 5-115 g / L of potassium hydroxide and 10-150 g / L of hydantoin derivatives. L. Mix 10-100g / L auxiliary complexing agent to completely dissolve the mixed complexing agent to obtain a solution of complex complexing agent, add potassium carbonate 5-150g / L to make a conductive salt, and adjust the pH value at 7 with potassium hydroxide Between ~13, weigh 1~80g / L of potassium gold chloride, dissolve the potassium gold chloride and add it to the previously prepared compound complexing agent solution to form the basic solution for electroplating gold, and add combined additives, the amount of which is 0.1~100mL / L, control the temperature at 20~75℃, stir for 0.1~24h. The plating solution is prepared with ultrapure water with a resistivity of 18MΩ / cm.
[0018] The electroplating process in th...
specific Embodiment approach 2
[0028] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the electroplating process of electroplating gold is: constant current electroplating method, and the current density is 0.5A / dm 2 , the distance between the cathode and the anode is 5cm, the temperature is 55°C, and the plating time is 10min. Electroplating gold bath composition: 1,3-dimethylol-5,5-dimethylhydantoin 45g / L, hypoxanthine 2g / L, potassium hydroxide 15g / L, potassium carbonate 25g / L, Potassium gold chloride 10g / L, combined additive 20mL / L, described combined additive consists of: antimony potassium tartrate 10g / L, polyethylene glycol 5g / L, guanine 5g / L, succinimide 5g / L . Adjust the pH of the plating solution to 10. During the preparation of the plating solution, control the temperature at 60° C. and stir for 20 hours. In the electroplating process, an inert metal electrode is used as the anode. A gold-plated layer with macroscopic golden yellow and full bright...
specific Embodiment approach 3
[0029] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the electroplating gold plating solution consists of: 1,3-dibromo-5,5-dimethylhydantoin 35g / L, potassium citrate 15g / L, potassium hydroxide 12g / L, potassium carbonate 28g / L, gold potassium chloride 14g / L, combined additive 85mL / L, described combined additive consists of: potassium selenite 5g / L, saccharin 10g / L , 1,4-butynediol 5g / L, sodium lauryl sulfate 1g / L. Adjust the pH of the plating solution to 10. During the preparation of the plating solution, control the temperature at 65° C. and stir for 15 hours. After electrolytic degreasing, pickling with 1:1 HCl aqueous solution, electroplating nickel intermediate layer and water washing, the copper sheet is used as the cathode, and the inert metal electrode is used as the anode. Density 2.0A / dm 2 , stirred properly, and the electroplating time was 3 minutes, to obtain a gold-plated layer with a macroscopic golden color...
PUM
Property | Measurement | Unit |
---|---|---|
thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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