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Fast-cleaning removing agent for steel brazing craters and preparing method of fast-cleaning removing agent

A brazing and fast technology, applied in the field of iron and steel brazing scar cleaning agents, can solve the problems of black, slow brazing scars, yellow smoke steel and other problems, and achieve environmental protection, improve work efficiency, and reduce energy consumption Effect

Inactive Publication Date: 2016-03-30
DALIAN SANDAAOKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The previous treatment method is to use a single nitric acid, sulfuric acid or hydrochloric acid to clean and remove, but there are the following problems: the single nitric acid emits yellow smoke and causes excessive corrosion to steel; the single use of sulfuric acid or hydrochloric acid, the removal of brazing scars is slow ( about 2 hours), and there is also the problem that the steel parts will be corroded into black after being cleaned

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The raw materials and mass percentages used are as follows: mass concentration 45% sulfuric acid 8%, mass concentration 31% hydrochloric acid 1%, fluoboric acid 6%, citric acid 1%, potassium ferrocyanide 3%, mass concentration 85% phosphoric acid 1%, urethane Lotropine 0.5%, QYL-211A three-in-one surfactant for acid degreasing, degreasing, derusting and inhibiting acid fog 0.1%,

[0009] QYL-290 decarbonization surfactant 0.5%, tap water balance.

[0010] The preparation method is carried out according to the following steps: first add the calculated and weighed tap water into the reaction kettle, start the agitator, set the speed at 60-80 rpm, and then sequentially add the calculated and weighed fluoboric acid, citric acid, ferrous Slowly add potassium cyanide and urotropine into the reaction kettle, and stir while adding to make them fully dissolve into a transparent liquid; Slowly add rust inhibiting acid mist three-in-one surfactant and QYL-290 carbon deposit remov...

Embodiment 2

[0013] The raw materials and mass percentages used are as follows: mass concentration 45% sulfuric acid 3%, mass concentration 31% hydrochloric acid 4%, fluoboric acid 3%, citric acid 2%, potassium ferrocyanide 1%, mass concentration 85% phosphoric acid 2%, urethane Lotropine 0.1%, QYL-211A three-in-one surfactant for degreasing, degreasing, derusting and inhibiting acid mist 0.5%, QYL-290 decarbonizing surfactant 0.1%, the balance of tap water.

[0014] The raw materials used and the preparation method are the same as in Example 1.

Embodiment 3

[0016] The raw materials and mass percentages used are as follows: mass concentration 45% sulfuric acid 5%, mass concentration 31% hydrochloric acid 3%, fluoboric acid 4%, citric acid 1.5%, potassium ferrocyanide 2%, mass concentration 85% phosphoric acid 1.5%, urethane Lotropine 0.3%, QYL-211A three-in-one surfactant for degreasing, degreasing, derusting, and inhibiting acid mist 0.4%, QYL-290 0.3% decarbonizing surfactant, the balance of tap water.

[0017] The raw materials used and the preparation method are the same as in Example 1.

[0018] When in use, directly immerse the workpiece with brazing scars into the stock solution of Example 1, 2 or 3 of the present invention, soak for 5-10 minutes at room temperature (10-35°C), and the brazing scars can be completely removed.

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PUM

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Abstract

The invention discloses a fast-cleaning removing agent for steel brazing craters. The fast-cleaning removing agent is prepared from, by mass, 3-8% of sulfuric acid with the mass concentration of 45%,1-4% of hydrochloric acid with the mass concentration of 31%, 3-6% of fluoboric acid, 1-2% of citric acid, 1-3% of potassium ferrocyanide, 1-2% of phosphoric acid with the mass concentration of 85%, 0.1-0.5% of hexamethylenetetramine, 0.1-0.5% QYL-211A acidity degreasing oil-removing, rust-removing and acid-mist-inhibiting three-in-one surface active agent, 0.1-0.5% of QYL-290 carbon-deposit-removing surface active agent, and the balance tap water. Workpieces with brazing craters can be soaked for 5-10 minutes at the normal temperature, brazing craters can be thoroughly removed without being heated, energy consumption is reduced, and work efficiency is improved; and the phenomena that smoke exists and overetching happens to steel in the treatment process are avoided, product quality is ensured, and environment protection is facilitated.

Description

technical field [0001] The invention relates to a cleaning agent for iron and steel brazing scars, in particular to a quick cleaning and removing agent for iron and steel brazing scars that does not corrode raw materials and is pollution-free and a preparation method thereof. Background technique [0002] The manufacture of precision instruments requires the combined processing of steel parts by brazing, and then the brazing scars must be removed. The previous treatment method is to use a single nitric acid, sulfuric acid or hydrochloric acid to clean and remove, but there are the following problems: the single nitric acid emits yellow smoke and causes excessive corrosion to steel; the single use of sulfuric acid or hydrochloric acid, the removal of brazing scars is slow ( 2 hours), and there is also the problem that the steel parts will be corroded into black after being cleaned. Contents of the invention [0003] The present invention aims to solve the above-mentioned t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/08C23F1/28
Inventor 潘德顺王剑朱国玉黄文飞郑力玮李文瀚
Owner DALIAN SANDAAOKE CHEM