A kind of rust remover and preparation method thereof

The technology of a rust remover and a corrosion inhibitor is applied in the field of metal surface treatment agent and its preparation, which can solve the problems of waste of acid solution, unfavorable environment, slow rust removal speed, etc., so as to reduce the waste of acid, reduce the production cost and protect the environment. Sex-enhancing effect

Active Publication Date: 2017-11-14
HUNAN JINHUA SCI & TECH GRP
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high labor intensity, low efficiency and serious dust pollution of the mechanical method, except for a few cases, the general steel pipe manufacturers use chemical methods for rust removal.
[0003] The simplest method for chemical rust removal of steel pipes is to use hydrochloric acid or sulfuric acid to treat the rust on the surface of steel pipes. In terms of rust removal effect, hydrochloric acid is higher than sulfuric acid, but it has one of the most fatal shortcomings: in the production process, hydrochloric acid It is volatile and produces a large amount of acid mist, which not only deteriorates the operating environment, but also causes certain corrosion to the surrounding steel structures and related equipment
Whether it is hydrochloric acid rust removal or sulfuric acid rust removal, there are the following problems: in the later period of use of the above-mentioned acid solution rust remover, as the acid concentration decreases and the ferrous concentration increases, the rust removal speed will become very slow. At this time, even if the acid concentration is increased, the effect is not great. Under this situation, if you want to completely remove the rust, you have to completely replace the acid solution in the acid tank. Therefore, simply using acid to remove rust will cause a large amount of acid solution to be wasted. , which is not good for the environment, and the production cost of the enterprise is also high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0013] As an embodiment of the present invention, a rust remover, the weight ratio of its components is: 2.5% hydrofluoric acid, 17% hydrochloric acid, 7.5% oxalic acid, 3% corrosion inhibitor, diaminoethane tetraacetic acid 2%, 0.6% of ethylene oxide and higher fatty alcohol condensate, and the balance is water. The corrosion inhibitor consists of hexamethylene, imidazolidinyl urea and rosin imidazolinium ammonium salt according to the weight of 3:0.4:0.9 Composite.

[0014] As another aspect of the present invention, the method for preparing above-mentioned rust remover comprises the following steps:

[0015] The first step is to prepare each component according to the above weight ratio, and put it in the corresponding container, take a part of the water from the water container and add it to the reaction kettle, and then stir it according to the above weight ratio. Add hydrofluoric acid, oxalic acid and diaminoethane tetraacetic acid successively into the reaction kettle;...

Embodiment 1

[0022] Under normal pressure, according to 2.5% hydrofluoric acid, 17% hydrochloric acid, 7.5% oxalic acid, 3% corrosion inhibitor (corrosion inhibitor consists of urotropine, imidazolidinyl urea and rosin imidazoline ammonium salt according to 3:0.4: 0.9 weight ratio), diaminoethane tetraacetic acid 2%, ethylene oxide and higher fatty alcohol condensate 0.6%, and the balance is the weight ratio of water. Prepare each component and put it in full bloom In the corresponding container, first take a part of water from the container filled with water and add it to the reaction kettle, then add hydrofluoric acid, oxalic acid, and diaminoethane tetraacetic acid to the reaction kettle successively while stirring, and then put the Heat the solution to 40-48°C, stir slowly, stop heating after the above components are fully dissolved in water, then add corrosion inhibitor, ethylene oxide and higher fatty alcohol condensate into the reaction kettle in sequence, and then keep stirring Aft...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a rust remover and a preparation method of the rust remover, and relates to the technical field of metal surface treatment agents. The rust remover comprises, by weight percent, 2.5% of hydrofluoric acid, 17% of hydrochloric acid, 7.5% of oxalic acid, 3% of a corrosion inhibitor, 2% of diaminoethane quadrol, 0.6% of ethylene oxide and high-level fatty alcohol condensation compound and the balance water. The corrosion inhibitor is formed by compounding naphthamine, imidazolidinyl urea and rosin imidazoline ammonium salt according to the weight ratio being 3:0.4:0.9. In the using process of the rust remover, compared with pure acid liquor rust removal in the prior art, the acid mist generated by the rust remover is obviously reduced; and on the premise that the use frequency is equal, the replacement frequency of the rust remover is only half that of the prior art, the waste of acid is reduced to the greatest extent, the production process is more environment-friendly, and the production cost of steel pipe enterprises is greatly reduced.

Description

technical field [0001] The invention relates to a metal surface treatment agent and a preparation method thereof, in particular to a rust remover and a preparation method of the rust remover. Background technique [0002] Before phosphating and cold drawing, steel pipes are usually derusted. At present, there are two types of rust removal methods in the industry: mechanical method and chemical method. Due to the high labor intensity, low efficiency and serious dust pollution of the mechanical method, except for a few cases, the general steel pipe manufacturers use chemical methods for rust removal. [0003] The simplest method for chemical rust removal of steel pipes is to use hydrochloric acid or sulfuric acid to treat the rust on the surface of steel pipes. In terms of rust removal effect, hydrochloric acid is higher than sulfuric acid, but it has one of the most fatal shortcomings: in the production process, hydrochloric acid It is volatile and produces a large amount o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/06
CPCC23G1/063
Inventor 赵端泉
Owner HUNAN JINHUA SCI & TECH GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap