Compounded main brightener for preparing zinc-plating brightener

A main brightener and brightener technology, applied in the field of metal electroplating and galvanizing, can solve the problems of easy discoloration and oxidation of the galvanized layer, and no brightening effect of the coating, and achieve reasonable formula components, not easy to oxidize, and good economic and social benefits Effect

Inactive Publication Date: 2011-04-06
杜石峰
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Since potassium salt galvanizing in the domestic electroplating industry used benzylidene acetone as the main brightener compound brightener in the 1980s, there has always been the problem of easy discoloration of the galvanized layer. Chlorobenzaldehyde is replaced by the compound brighten

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 Construction

[0006] Embodiments of the present invention will be described below in conjunction with examples.

[0007] Example 1, according to the ratio of 59% salicylaldehyde, 26% formaldehyde, and 15% 2.4-dichlorobenzaldehyde, put various ingredients into the reaction kettle and mix and stir, and then add alkali with a content of 50% at a ratio of 400ml / L solution, adjust the pH to 6.3, heat the reactor to 75°C, and keep it warm for 4 hours. Then naturally lower to room temperature, filter the mixed liquid with a filter cloth, filter out the white precipitated material, add it to a spin dryer, spin dry and dehydrate, then put the obtained material into a dryer for drying, and form a white powder after drying. That is the finished product of the present invention.

[0008] Example 2, according to the proportion configuration of salicylaldehyde 61%, formaldehyde 25%, 2.4-dichlorobenzaldehyde 14%, put various components into the reaction kettle and mix and stir. Then add 50% lye at a rat...

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 compounded main brightener for preparing a zinc-plating brightener, which comprises the following components in percent by weight: 59-61 percent of salicylic aldehyde, 24-26 percent of formaldehyde and 14-16 percent of 2,4-dichlorobenzaldehyde. The method comprises the following steps of: preparing the components according to the proportion; adding the components into a reaction kettle, and mixing and stirring uniformly; adding alkali liquid with the content of 50 percent according to the proportion of 350-400ml/L; regulating a pH value to 6.3-6.7; heating to 75-85 DEG C; keeping the temperature for 3-4 hours; reducing the temperature to the room temperature and filtering by using a piece of filtering cloth; adding the filtered precipitate material into a drying machine for drying; and adding the filtered precipitate material into a dryer for drying to obtain a finished product. The finished product and a high-temperature carrier are prepared into compounded brightener for sylvite zinc plating, and the compounded main brightener has the advantages of quick polishing, no oxidation, good galvanization and high cladding brightness and is stable and durable without color changing.

Description

technical field [0001] The invention relates to metal electroplating and galvanizing, in particular to a brightener for potassium salt galvanizing. Background technique [0002] Since potassium salt galvanizing in the domestic electroplating industry used benzylidene acetone as the main brightener compound brightener in the 1980s, there has always been the problem of easy discoloration of the galvanized layer. Chlorobenzaldehyde is replaced by the compound brightener made of o-chlorobenzaldehyde as the main brightener. Benzaldehyde will be oxidized to o-chlorobenzoic acid during the electroplating process, resulting in no bright effect of the coating. Therefore, it is necessary to continuously add brighteners during the galvanizing process to achieve the bright effect. The oxidation of o-chlorobenzaldehyde, the main brightener in the brightener, affects the galvanizing effect, which has been puzzling people so far and needs to be improved and solved urgently. Contents of ...

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): C25D3/22
Inventor 杜石峰梁新中
Owner 杜石峰
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap