Supercharge Your Innovation With Domain-Expert AI Agents!

Trivalent chromium electroplating solution and preparation method thereof

A trivalent chromium and solution technology, applied in the field of electroplating, can solve the problems of thin coating and unstable electroplating solution, and achieve the effects of improving stability, reducing sensitivity and avoiding damage

Active Publication Date: 2020-05-29
GUANGZHOU SANFU NEW MATERIALS TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing sulfate system often has problems such as unstable plating solution and thin coating.

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
  • Trivalent chromium electroplating solution and preparation method thereof
  • Trivalent chromium electroplating solution and preparation method thereof
  • Trivalent chromium electroplating solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The trivalent chromium electroplating solution described in this embodiment consists of: the main salt is 30g / L chromium sulfate hexahydrate, 10g / L basic chromium sulfate; the conductive salt is 120g / L sodium sulfate, 30g / L ammonium sulfate; the buffering agent is 5g / L aluminum sulfate and 45g / L boric acid; complexing agent is 30g / L formic acid, 10g / L glycolic acid; stabilizer is 0.05g / L sodium bisulfate and 0.05g / L glucosamine; impurity remover is 0.044g / L 3-amino-2-hydroxy-5-nitrobenzenesulfonic acid hydrate and 0.056g / L 3-cinnamoyl tropolone; the wetting agent is 0.02g / L sodium dodecylbenzenesulfonate.

[0030] The preparation method of trivalent chromium electroplating solution described in the present embodiment is:

[0031] S1 Soak the tank body with a sulfuric acid solution with a volume ratio of 1%, then pour water into the tank body, and heat to 60°C;

[0032] S2 Add main salt and complexing agent to the tank, stir and keep warm for 1-2 hours, then add buffer...

Embodiment 2

[0036] The trivalent chromium electroplating solution described in this embodiment consists of: the main salt is 30g / L chromium sulfate hexahydrate, 20g / L basic chromium sulfate; the conductive salt is 100g / L sodium sulfate, 50g / L ammonium sulfate, 50g / L Potassium aluminum sulfate; buffering agent is 10g / L aluminum sulfate, 50g / L boric acid; complexing agent is 25g / L formic acid, 20g / L citric acid; stabilizer is 0.03g / L sodium bisulfate and 0.03g / L glucosamine The impurity remover is 0.025g / L 3-amino-2-hydroxy-5-nitrobenzenesulfonic acid hydrate and 0.025g / L 3-cinnamoyl tropolone; the wetting agent is 0.03g / L dodecane Sodium phenyl sulfonate.

[0037] The preparation method of the trivalent chromium electroplating solution described in the present embodiment is substantially the same as in Example 1, the difference being that the pH value of the mixed solution described in S3 is 2.5.

Embodiment 3

[0039] The trivalent chromium electroplating solution described in the present embodiment consists of: the main salt is 15g / L chromium sulfate hexahydrate, 20g / L basic chromium sulfate; the conductive salt is 180g / L sodium sulfate; the buffer is 15g / L glycine, 35g / L boric acid; complexing agent is 30g / L formic acid, 20g / L citric acid; stabilizer is 0.071g / L sodium bisulfate and 0.089g / L glucosamine; impurity remover is 0.08g / L 3-amino- 2-Hydroxy-5-nitrobenzenesulfonic acid hydrate and 0.08g / L 3-cinnamoyl tropolone; the wetting agent is 0.02g / L sodium dodecylbenzenesulfonate.

[0040] The preparation method of the trivalent chromium electroplating solution described in the present embodiment is basically the same as in Example 1, the difference being that the pH value of the mixed solution described in S3 is 3.0.

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides trivalent chromium electroplating solution and a preparation method thereof. The trivalent chromium electroplating solution comprises the following components: 20-50g / L of mainsalt, 130-200g / L of conducting salt, 40-60g / L of a buffering agent, 25-50g / L of a complexing agent, 0.05-0.2g / L of a stabilizer, 0.05-0.2g / L of an impurity removal agent and 0.01-0.03g / L of a wettingagent, wherein the impurity removal agent is composed of 3-amino-2-hydroxy-5-nitrobenzene sulfonic acid hydrate and 3-cinnamoyltropolone according to the mass ratio of (0.5-1):1; and the stabilizer iscomposed of sodium hydrogen sulfate and glucosamine according to the mass ratio of (0.8-1.2) :1. The trivalent chromium electroplating solution is high in stability; and the thickness of a coating prepared on a brass workpiece can reach 67 microns.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a trivalent chromium electroplating solution and a preparation method thereof. Background technique [0002] At present, in the electroplating industry, chrome plating occupies a huge market share. The chrome plating layer not only has the performance characteristics of high hardness and strong wear resistance, but also has certain decorative properties. It can be used as a functional and decorative coating. It is widely used in machinery manufacturing, household kitchen industry, hardware industry and other industries. application. [0003] The chrome plating process can be divided into hexavalent chromium plating and trivalent chromium plating. The toxicity of the trivalent chromium electroplating solution is low, only one percent of that of the hexavalent chromium electroplating solution, which improves the safety of the chromium plating process. Among them, the triv...

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): C25D3/06C25D3/10
CPCC25D3/06C25D3/10
Inventor 田志斌詹益腾邓正平孟祥举
Owner GUANGZHOU SANFU NEW MATERIALS TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com