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

A black electrolytic coloring additive for aluminum profiles and its coloring process

An electrolyte additive and electrolytic coloring technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve the problems of single-tin salt coloring process instability, high cost, and low-thickness oxide film. , to achieve the effect of good black reproducibility, low cost of matching tanks and prolonging the coloring time

Active Publication Date: 2022-04-29
WUHAN RES INST OF MATERIALS PROTECTION
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a kind of technology that uses cheap copper salt as the main salt to realize electrolytic blackening on the anodic oxide film of relatively low thickness (6-8μm). It replaces the traditional single-tin salt electrolytic blackening process, and solves production problems such as unstable single-tin salt coloring process, high cost, and low-thickness oxide film blackening is not deep.

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
  • A black electrolytic coloring additive for aluminum profiles and its coloring process
  • A black electrolytic coloring additive for aluminum profiles and its coloring process
  • A black electrolytic coloring additive for aluminum profiles and its coloring process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A black solid additive for aluminum alloy electrolysis, comprising the following components:

[0032]

[0033]

[0034] The conductive salt is magnesium sulfate heptahydrate, the complexing agent is tartaric acid, the stabilizing agent is sodium thiazoline dithiopropane sulfonate; the wetting agent is polyethylene glycol (M=6000~10000), the coloring Auxiliary salt is antimony potassium tartrate.

[0035] The process of electrolytic blackening includes the following steps:

[0036] (1) Pretreatment, immerse the aluminum alloy sample in a solution containing strong alkaline substances such as sodium hydroxide for alkaline etching treatment, remove the natural oxide film, and wash it with water.

[0037] (2) Anodic oxidation, the aluminum alloy sample that has been treated by alkali etching is immersed in a sulfuric acid solution prepared by concentrated sulfuric acid (98%) and pure water according to the mass ratio of 18:82 for anodic oxidation treatment. Oxidatio...

Embodiment 2

[0041] A black solid additive for aluminum alloy electrolysis, comprising the following components:

[0042]

[0043] The conductive salt is aluminum sulfate hexadecahydrate, the complexing agent is salicylic acid, the stabilizing agent is sodium polydithiodipropane sulfonate; the wetting agent is polyether, and the auxiliary coloring salt is antimony potassium tartrate.

[0044] The process of electrolytic blackening is the same as that of Example 1. Finally, under the condition that the anodic oxide film is 6-8 μm and the electrolytic coloring time is 10 minutes, a true black oxide film surface is obtained.

Embodiment 3

[0046] A black solid additive for aluminum alloy electrolysis, comprising the following components:

[0047]

[0048]

[0049] The conductive salt is magnesium acetate, the complexing agent is sodium citrate, the stabilizer is sodium polydithiodipropane sulfonate; the wetting agent is polyether, and the auxiliary coloring salt is antimony potassium tartrate.

[0050] The process of electrolytic blackening is the same as that of Example 1. Finally, under the condition that the anodic oxide film is 6-8 μm and the electrolytic coloring time is 10 minutes, a true black oxide film surface is obtained.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a black electrolytic coloring additive for aluminum profiles and a coloring process thereof. The additive formula consists of 10-15% of a conductive salt; 15-20% of a complexing agent; 5-8% of a stabilizer and a wetting agent 0.1-0.5%, coloring auxiliary salt 5%-10%, copper sulfate pentahydrate 50-60%. Compared with tin salt coloring black additives with poor stability, the present invention can achieve a true black appearance under the condition of a relatively low thickness oxide film (6-8 μm), the copper salt bath solution is stable, the coloring and dispersion reproducibility is good, and the additive formulation The cost of the tank is much lower than that of the tin salt system, and it has the advantages of energy saving and cost reduction when used in the electrolytic black decoration industry of aluminum profiles.

Description

technical field [0001] The invention relates to the field of aluminum alloy surface technology treatment, in particular to a black electrolytic coloring additive for aluminum profiles and a coloring process thereof. Background technique [0002] Electrolytic coloring of aluminum anodized film is a surface treatment technology for aluminum alloy surface decoration. The coloring process is actually a phenomenon of electrolysis of metal ions or metal compounds at the bottom of the pores of the porous oxide film, which shows the color of reflected light through light scattering. Compared with chemical dyeing and natural hair coloring, electrolytic coloring has a wider color range and better light fastness, which is very suitable for the treatment of outdoor decorative parts. Since Asada mentioned this method in the patent in 1960 and applied it to industrial production, electrolytic coloring technology has become one of the most common coloring technologies for aluminum alloy s...

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): C25D11/14C25D11/08C25D11/16
CPCC25D11/14C25D11/08C25D11/16
Inventor 刘晓辉刘传烨兰林欧阳贵
Owner WUHAN RES INST OF MATERIALS PROTECTION
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