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

A kind of method of electroplating rhodium layer

A pre-plating and workpiece technology, applied in the field of new rhodium layer electroplating process, can solve the problems of easy discoloration, cracking, and falling off of the rhodium-plated layer, and achieves the maintenance of structure and shape, high product cost, and short process route. Effect

Inactive Publication Date: 2015-11-18
CENT SOUTH UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a new method for electroplating rhodium layer, which solves the defects that the rhodium plating layer on the surface of the workpiece is easy to change color, easy to fall off, easy to produce cracks, pores, etc.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Pretreatment:

[0022] (1) Ultrasonically treat the workpiece in acetone (intensity range: 3-20MHz) for 0.5-1.5 hours;

[0023] (2) Take out the above workpiece and ultrasonically treat it with double distilled water for 0.2 to 1.0 hours;

[0024] (3) Take out the above-mentioned workpiece and treat it with hydrogen peroxide with a mass fraction of 1-30% at 30-50°C for 3-10 minutes;

[0025] (4) Take out the above-mentioned workpiece and place it in a new hydrogen peroxide solution with a mass fraction of 1-30%. After ultrasonication for 1-5 minutes, continue to add sodium hydroxide for ultrasonic treatment. ~10.0%; when the solution turns red, take out the workpiece, wash with double distilled water, and then ultrasonically treat with double distilled water for 3 times, each time for 0.2 to 0.8 hours;

[0026] (5) Take out the above-mentioned workpiece, dry it, and blow it dry quickly with hot air at 80-150°C, and set it aside.

[0027] 2. Pre-plating:

[0028] ...

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 method for electroplating a rhodium coating, which comprises the following steps: workpiece pretreatment, pre-plating, high-temperature crystallization and rhodium electroplating. The invention solves the problems of poor wear resistance, poor corrosion resistance and the like of the coating due to high discoloration tendency, high cracking tendency, high pore tendency and high coating shedding tendency of the rhodium coating on the workpiece surface in the prior art, and effectively improves the brightness, no crack, corrosion resistance and other properties of the rhodium coating of the workpiece.

Description

technical field [0001] The invention belongs to the technical field of rhodium electroplating, and in particular relates to a new rhodium layer electroplating process. Background technique [0002] Rhodium is the most precious precious metal in the platinum group. It is silvery white and has very good corrosion resistance. It is not easily corroded by corrosive gases in the atmosphere. The rhodium layer is electroplated on the surface of the workpiece, because the rhodium plating layer has high chemical stability, which can effectively protect the workpiece. For example, flash-plating a 0.025-0.050μm thick rhodium coating on the workpiece can effectively prevent the coating from changing color. The rhodium-plated layer is bright silvery white, bright in tone, extremely high in hardness, wear-resistant, heat-resistant, small in contact resistance, and good in electrical conductivity. Rhodium plating is often used in the electrical and electronic industry, optical industry, ...

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 Patents(China)
IPC IPC(8): C25D3/50C25D5/34
Inventor 于金刚陈晓青焦飞鹏蒋新宇
Owner CENT SOUTH UNIV
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