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Acidic degreasing and derusting liquid prepared by utilizing industrial wastewater and preparation method of acidic degreasing and derusting liquid

A technology for industrial waste water and acid degreasing, which is applied in the field of derusting liquid, can solve the problems of short effective antirust time and environmental pollution, achieve good degreasing and derusting effects, prevent hydrogen embrittlement, and have good corrosion inhibition effects

Active Publication Date: 2017-02-15
WUHAN OXIRAN SPECIALTY CHEM CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The technical feature described in this patents relates to an improved method for cleaning metals that use specific substances like acids to remove unwanted materials from them without causing harmful side reactions during processing. This results in better quality products while minimizing environmental impact.

Problems solved by technology

The technical problem addressed in this patented text relates to improving the efficiency with which existing methods can protect against corrosive damage caused from acid rain or other factors like salt sprays during construction activities.

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

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Claims

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Application Information

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Owner WUHAN OXIRAN SPECIALTY CHEM CO
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