Smokeless odorless bleaching agent for die-casting aluminum and preparation method and application of smokeless odorless bleaching agent

An odorless, bleaching agent technology, applied in the field of bleaching agent, can solve the problems of environmental pollution, irritating smell, aeration, etc., and achieve the effect of strong bleaching ability, less damage and less pollution

Pending Publication Date: 2021-12-10
东莞市四辉表面处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently on the market, most of the bleach products for die-casting aluminum are strongly acidic, and will emit yellow smoke during use and release NO, NO 2 and other toxic gases, in addition, there will be gas blowing during storage and transportation
At the same time, there will be irritating smell in the process of production and use, which will harm the health of operators and users, and also cause serious pollution to the environment.

Method used

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  • Smokeless odorless bleaching agent for die-casting aluminum and preparation method and application of smokeless odorless bleaching agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In the present embodiment, each raw material and percentage by weight in the bleaching agent:

[0022] Citric acid 8%;

[0023] Potassium fluoride 20%;

[0024] Ammonium bifluoride 6%;

[0025] Sodium thiosulfate 6%;

[0026] Pure water 60%;

[0027] The above raw materials are mixed and prepared according to the weight percentage. First add pure water to the reaction kettle, then add citric acid and stir for 30 minutes, then add potassium fluoride and stir for 30 minutes, then add ammonium bifluoride and stir for 30 minutes, and finally add sodium thiosulfate Stir for 30 minutes until it is completely dissolved, then open the valve of the reactor and fill it.

[0028] The bleaching agent is applied to the bleaching agent after alkaline de-anodizing film of die-casting aluminum and aluminum alloy combination parts, and has good effect.

Embodiment 2

[0030] In the present embodiment, each raw material and percentage by weight in the bleaching agent:

[0031] Hydroxyethylidene diphosphate 6%;

[0032] Potassium fluoride 22%;

[0033] Ammonium bifluoride 9%;

[0034] Hydrogen peroxide 8%;

[0035] Pure water 55%;

[0036] The above raw materials are mixed and prepared according to the weight percentage. First add pure water to the reaction kettle, then add hydroxyethylidene diphosphoric acid and stir for 30 minutes, then add potassium fluoride and stir for 30 minutes, then add ammonium bifluoride and stir for 30 minutes, and finally add hydrogen peroxide Stir for 30 minutes until it is completely dissolved, then open the valve of the reactor and fill it.

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PUM

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Abstract

The invention discloses a preparation method of a smokeless odorless bleaching agent for die-casting aluminum. The preparation method comprises the following steps: adding a certain amount of pure water into a reaction kettle; sequentially adding a first raw material, a second raw material, a third raw material and a fourth raw material into the reaction kettle, and stirring while adding, wherein the first raw material is 1-hydroxyethylidene-1, 1-diphosphonic acid or citric acid, the second raw material is potassium fluoride, the third raw material is ammonium bifluoride, and the fourth raw material is sodium thiosulfate or hydrogen peroxide; and fully stirring the mixture until the mixture is completely dissolved. The invention further discloses the smokeless odorless bleaching agent for the die-casting aluminum and application of the smokeless odorless bleaching agent. The bleaching agent prepared by the invention has strong bleaching ability to the die-casting aluminum, weak corrosivity to the die-casting aluminum, no smoke and no odor, reduces the harm to human bodies in the production process of electronic products, reduces the pollution to the environment, and meets the requirements of market and industry development.

Description

technical field [0001] The invention relates to the technical field of bleaching agents, in particular to a smokeless and odorless bleaching agent for die-casting aluminum and its preparation method and application. Background technique [0002] With the rapid development of the electronics industry and the people-oriented development concept this year, the surface treatment and maintenance of electronic components is not only related to production costs, but also related to environmental protection and the health of operators and users. Currently on the market, most of the bleach products for die-casting aluminum are strongly acidic, and will emit yellow smoke during use and release NO, NO 2 In addition, there will be gas blowing during storage and transportation. At the same time, there will be pungent smell in the process of production and use, which will harm the health of operators and users, and also cause serious pollution to the environment. Therefore, how to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/12
CPCC23G1/125
Inventor 肖建军刘洪强
Owner 东莞市四辉表面处理科技有限公司
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