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

Application process of multi-layer electroplated coinage materials and products thereof

A multi-layer electroplating and coinage technology, applied in the field of coinage, can solve problems such as poor corrosion resistance of nickel-iron alloys, and achieve the effects of good process performance, poor corrosion resistance and lower coinage costs.

Active Publication Date: 2009-09-16
SHANGHAI MINT +1
View PDF0 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a multi-layer electroplating coinage material application process and product in view of the deficiencies of the prior art. The process reduces the cost of coinage; the product has special electromagnetic properties, and strengthens the machine-readable anti-counterfeiting of circulating coins performance and improve its processing performance, and at the same time solve the problem of poor corrosion resistance of nickel-iron alloy as a surface coating in a humid environment

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
  • Application process of multi-layer electroplated coinage materials and products thereof
  • Application process of multi-layer electroplated coinage materials and products thereof
  • Application process of multi-layer electroplated coinage materials and products thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Electroplating nickel-iron alloy layer and nickel layer on the coinage material (metal cake-shaped material) is specifically carried out according to the following steps:

[0062] (1), Electroplated nickel-iron alloy bottom layer

[0063] a. Alkaline washing

[0064] Put the metal cake-shaped material into the alkaline cleaning tank, the alkaline cleaning solution is prepared with 48g / L alkaline cleaning agent, the pH value is 12, the temperature is 65°C, and the drum speed is 7r / min for 1 minute cleaning, and then use Rinse with ionized water. Alkaline cleaning agent consists of sodium hydroxide: 41.8%, sodium carbonate: 25.0%, sodium gluconate: 2.2%, nonylphenol 1.8%, sodium silicate 9.2%, sodium triphosphate 9.2%, EDTA9.0%, twelve Sodium Alkylbenzene Sulfate 1.8% Composition.

[0065] The oil stains on the above-mentioned cake-shaped materials can be preliminarily removed by alkaline cleaning. Alkaline cleaning includes the chemical degreasing process of saponific...

Embodiment 2

[0082] Electroplate nickel-iron alloy layer, copper layer and nickel layer respectively successively on coinage material (metal cake shape material), and its specific electroplating process is carried out according to the following steps:

[0083] (1), Electroplated nickel-iron alloy bottom layer

[0084] a. Alkaline washing

[0085] Put the metal cake-shaped material into the alkaline cleaning tank, the alkaline cleaning solution is prepared with 55g / L alkaline cleaning agent, the pH value is 12, the temperature is 60°C, and the drum speed is 8r / min for 2 minutes, and then use Rinse with ionized water. Alkaline cleaning agent consists of sodium hydroxide: 43.5%, sodium carbonate: 28.0%, sodium gluconate: 3.0%, nonylphenol 2.2%, sodium silicate 10.0%, sodium triphosphate 10.0%, EDTA9.5%, twelve Sodium Alkylbenzene Sulfate 2.0% composition.

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 an application process of multi-layer electroplated coinage materials and products thereof. The process is characterized in that the coinage material is applied to the manufacturing of planchet cakes after the multi-layer electroplating. The multi-layer electroplating is characterized in that a Ni-Fe alloy layer and a nickel layer or a Ni-Fe alloy layer, a copper layer and a nickel layer are successfully electroplated on the coinage material. The specific process comprises alkali washing, electrochemical washing, activating treatment and Ni-Fe alloy layer, copper layer and nickel layer electroplating procedures. The application process can lower the production cost and improve the production efficiency. The prepared coinage planchet cakes have good processing performance and specific electromagnetic signals. The machine-readable anti-conterfeiting performance of circulation coins is strengthened. Simultaneously, the poor corrosion resistance problem of the Ni-Fe alloy which is used as a surface coating under the moist environment is solved.

Description

technical field [0001] The invention relates to the technical field of coinage, in particular to an application process of multilayer electroplating coinage materials and its products. Background technique [0002] Nickel-iron alloy coating has excellent magnetic, electrical and mechanical properties, fine crystallization, strong covering ability, good brightness, leveling, uniformity, ductility and corrosion resistance. Nickel-iron alloy coating is widely used as a protective decoration and wear-resistant material. It is an important functional magnetic material. The cost of electrodepositing nickel-iron alloy is low. The iron content in the coating can be adjusted, and it can be deposited on almost any conductive substrate. [0003] The earliest research on nickel-iron alloy electrodeposition was used for protection and decoration, which can save expensive nickel. In the 1940s and 1950s, the exploration and research of nickel-iron alloy plating began, but the development ...

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): C25D5/12C25D3/12C25D3/38C25D3/56B32B15/01A44C21/00
Inventor 张勃徐伟王卓新杨磊
Owner SHANGHAI MINT
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