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A kind of acid degreasing and descaling liquid prepared from industrial waste water and preparation method thereof

A technology for industrial wastewater and acid degreasing, applied in the field of rust removal solution, can solve the problems of short effective rust prevention time and environmental pollution, and achieve the effect of good degreasing and rust removal, preventing hydrogen embrittlement and good corrosion inhibition effect.

Active Publication Date: 2019-08-06
WUHAN OXIRAN SPECIALTY CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the above process is that the structure of the anti-corrosion layer formed according to the above formula is relatively loose, the effective anti-rust time is relatively short, and the waste water still pollutes the environment to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In terms of mass percentage, take 92.7% industrial waste water, add 0.3% rhodine, 5% citric acid and 2% sodium dodecyl diphenyl ether disulfonate, fully miscible into a homogeneous solution, which is degreasing and degreasing rust liquid. The main components of industrial wastewater include sulfamic acid, urea, ammonium sulfamate, fatty alcohol polyoxyethylene ether sulfamate, fatty alcohol polyoxyethylene ether, and the balance is water; among them, the content of sulfamic acid in industrial wastewater is 3.71%, and the solid content is 4.63%.

[0020] Immerse the iron and steel parts to be cleaned in the degreasing and derusting liquid prepared above, and according to the degree of rust and oil pollution of the parts, properly raise the temperature to no more than 60°C, and soak for about 5-30 minutes.

[0021] The corrosion inhibition efficiency obtained through the experimental test is 99%, which shows that it is an efficient degreasing and derusting liquid.

Embodiment 2

[0023] In terms of mass percentage, take 97.9% of industrial waste water and add 0.1% of thiourea / potassium thiocyanate, 1% of EDTA and 1% of imidazoline phosphate, fully miscible into a homogeneous solution, which is the oil and rust removal solution. The main components of industrial wastewater include sulfamic acid, urea, ammonium sulfamic acid salt, fatty alcohol polyoxyethylene ether sulfamic acid salt, and the balance is water; among them, the content of sulfamic acid in industrial wastewater is 19.52%, and the solid content is 44.71%.

[0024] Immerse the iron and steel parts to be cleaned in the degreasing and derusting liquid prepared above, and according to the degree of rust and oil pollution of the parts, properly raise the temperature to no more than 60°C, and soak for about 5-30 minutes.

[0025] The corrosion inhibition efficiency obtained through the experimental test is 98%, which shows that it is an efficient degreasing and derusting liquid.

Embodiment 3

[0027] In terms of mass percentage, take 95.3% of industrial waste water, add 0.2% of cycloethyldiyne oxymethylamine sodium acetate, 3% of polysilicate ferric sulfate and 1.5% of isooctyl phosphate, fully miscible and homogeneous The solution is degreasing and derusting solution. The main components of industrial wastewater include sulfamic acid, urea, and ammonium salt of sulfamic acid, and the balance is water; among them, the content of sulfamic acid in industrial wastewater is 5.65%, and the solid content is 15.34%.

[0028] Immerse the iron and steel parts to be cleaned in the degreasing and derusting liquid prepared above, and according to the degree of rust and oil pollution of the parts, properly raise the temperature to no more than 60°C, and soak for about 5-30 minutes.

[0029] The corrosion inhibition efficiency obtained through the experimental test is 98%, which shows that it is an efficient degreasing and derusting liquid.

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PUM

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Abstract

The invention discloses acidic degreasing and derusting liquid prepared by utilizing industrial wastewater and a preparation method of the acidic degreasing and derusting liquid. The acidic degreasing and derusting liquid is prepared from the following raw materials in percentage by mass: 0.1% to 0.5% of a corrosion inhibitor, 1% to 5% of a flocculating agent, 1% to 2.5% of a dispersant and the balance industrial wastewater, wherein the main ingredients of the industrial wastewater include one ore more of sulfamic acid, urea, ammonium sulfamate, fatty alcohol polyethenoxy ether sulfamate and fatty alcohol-polyoxyethylene ether, and the balance water; the corrosion inhibitor is selected from one or several of rodine, thiourea, imidazoline, potassium sulfocyanide and cyclic-ethyl diyneoxymethylamine sodium acetate. The acidic degreasing and derusting liquid disclosed by the invention is capable of realizing reutilization of the industrial wastewater, economical and environment-friendly; meanwhile, the acidic degreasing and derusting liquid plays a good degreasing and derusting effect after being added with a certain amount of aid agent, is simple to operate and plays a quite good corrosion inhibition effect on metals.

Description

technical field [0001] The invention relates to the technical field of derusting liquid, in particular to an acid degreasing and derusting liquid prepared from industrial waste water and a preparation method thereof. Background technique [0002] At present, the more advanced anti-rust and rust-removing technologies for steel surfaces basically use formulas such as rust-removing phosphating agents and phosphating solutions to form an anti-corrosion layer on the steel surface. But the shortcoming of above-mentioned technology is that the structure of anti-corrosion layer formed by above-mentioned formula is relatively loose, the time of effective antirust is shorter, and its waste water still has certain pollution to environment. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the purpose of the present invention is to provide a kind of acid degreasing and descaling liquid prepared by industrial waste water and its preparation meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06C23G1/08
CPCC23G1/065C23G1/088
Inventor 付远波付艳梅任凡潘琦张静余洁王亮
Owner WUHAN OXIRAN SPECIALTY CHEM CO
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