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Environment-friendly bright pickling agent and compounding method thereof

A bright pickling agent, an environmentally friendly technology, applied in the field of cleaning agents, can solve the problems of high environmental hazards, increased processing difficulty, and over-corrosion of workpieces, and achieve the effects of simple wastewater treatment procedures, overcoming discoloration of copper surfaces, and saving production costs

Pending Publication Date: 2019-12-20
沈阳永清环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, there has been little progress in the treatment of the oxide layer formed on the surface of pure copper or copper alloy during casting, welding, and annealing. Generally, nitric acid is used to corrode the workpiece. The disadvantage is that nitric acid is a strong acid, which is easy to cause excessive damage to the workpiece. Corrosion and other phenomena are volatile, and reddish-brown gas will be produced during the pickling process, which is harmful to the environment. With the gradual deepening of the country's environmental protection work, this process has been gradually eliminated
At present, the more advanced and commonly used process method is to pickle pure copper or copper alloy with sulfuric acid / potassium hydrogen persulfate complex system pickling solution, which solves the treatment of harmful volatile gases and improves the pickling quality of the workpiece surface. , but the copper surface treated by this process is semi-bright, and its microscopic surface is uneven and uneven, so it is difficult to achieve the purpose of bright cleaning
For some workpieces with high surface precision requirements, it does not meet the requirements of bright pickling
In addition, the waste water produced by the existing pickling agents has great environmental pollution, increased processing difficulty and high cost, and cannot meet the requirements of environment-friendly pickling agents

Method used

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  • Environment-friendly bright pickling agent and compounding method thereof
  • Environment-friendly bright pickling agent and compounding method thereof
  • Environment-friendly bright pickling agent and compounding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparing pickling agent of the present invention, comprises the steps:

[0051] (1) add 30% water with the volume of described preparation device in the preparation device, drop into 130g of potassium hydrogen persulfate compound salt, stir, and constantly add clear water to 50% of the volume of preparation device;

[0052](2) Add 35g of phosphoric acid under stirring conditions, then add 3g of potassium persulfate, 3g of sodium hydrogensulfate and 30g of dipotassium hydrogenphosphate, and stir until completely dissolved, add 2g of hydrogen peroxide (hydrogen peroxide content), stir well, add water to 1L , that is pickling agent.

Embodiment 2

[0054] Preparing pickling agent of the present invention, comprises the steps:

[0055] (1) add the water of 25% with the volume of described preparation device in preparation device, drop into potassium hydrogen persulfate compound salt 140g, stir, and constantly add clear water to 45% of the volume of preparation device;

[0056] (2) Add 40g of phosphoric acid while stirring, then add 2.5g of potassium persulfate, 2.5g of sodium hydrogensulfate and 35g of dipotassium hydrogenphosphate, and stir until completely dissolved, add 5mL of hydrogen peroxide, stir evenly, add water to 1L, that is Get pickling agent.

Embodiment 3

[0058] Preparing pickling agent of the present invention, comprises the steps:

[0059] (1) add 35% water with the volume of described preparation device in preparation device, drop into 180g of potassium hydrogen persulfate compound salt, stir, and constantly add clear water to 60% of the volume of preparation device;

[0060] (2) Add 58g of phosphoric acid under stirring conditions, then add 5g of potassium persulfate, 5g of sodium hydrogensulfate and 30g of dipotassium hydrogenphosphate, and stir until completely dissolved, add 8mL of hydrogen peroxide, stir evenly, add water to 1L, and obtain the acid lotion.

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Abstract

The invention discloses an environment-friendly bright pickling agent and a compounding method thereof. Raw materials of the environment-friendly bright pickling agent consist of phosphoric acid, potassium peroxymonosulfate, persulfide, hydrosulfate, stabilizer, oxidant and water. The environment-friendly bright pickling agent is characterized in that the pickling agent is a phosphoric acid / potassium peroxymonosulfate system, the pickling agent is overall in a moderately strong acid environment, the optimum working temperature is 25-37 DEG C, the potassium peroxymonosulfate cooperates with the phosphoric acid, the stabilizer, superoxide and the like for playing a part in performing micro-etching on copper or copper alloy, is small in corrosion amount for a workpiece, uniform in washing speed, and stable and controllable, and has obvious polishing and levelling function for the copper material, the obtained workpiece is high in surface finish degree, and microscopic flatness of the surface of the workpiece after being washed is superior to washing effect of strong acid pickling solutions such as sulfuric acid. Meanwhile, the environment-friendly bright pickling agent has protectionfunction for the surface of the workpiece after being pickled, and overcomes the discoloring problem of the surface of the copper in practical production. Furthermore, the phosphoric acid pickling agent system is colorless and odorless, does not contain volatile substances, is simple in wastewater treatment, and causes low pollution to environment.

Description

technical field [0001] The invention relates to the technical field of cleaning agents, in particular to an environment-friendly bright pickling agent and a preparation method thereof. Background technique [0002] In recent years, there has been little progress in the treatment of the oxide layer formed on the surface of pure copper or copper alloy during casting, welding, and annealing. Generally, nitric acid is used to corrode the workpiece. The disadvantage is that nitric acid is a strong acid, which is easy to cause excessive damage to the workpiece. Corrosion and other phenomena are volatile, and reddish-brown gas will be produced during the pickling process, which is harmful to the environment. With the gradual deepening of the country's environmental protection work, this process has been gradually eliminated. At present, the more advanced and commonly used process method is to pickle pure copper or copper alloy with sulfuric acid / potassium hydrogen persulfate comple...

Claims

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Application Information

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IPC IPC(8): C23G1/10
CPCC23G1/103
Inventor 郭宝军郭宝印
Owner 沈阳永清环保科技有限公司
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