Acid-washing corrosion-inhibiting fog inhibitor and preparation method thereof

A fog inhibitor and corrosion inhibitor technology, applied in the field of pickling corrosion inhibitor and fog inhibitor and its preparation, can solve the problems of casting matrix erosion, unable to restore plasticity, casting loss, etc., to reduce erosion, reduce hydrogen embrittlement, prevent excessive The effect of pickling

Inactive Publication Date: 2013-12-11
武汉亿强科技开发股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to acid mist pollution, the pickling process also has the problem of over-pickling. Over-pickling will corrode the casting matrix and cause loss of castings. At the same time, it will cause hydrogen embrittlement of the metal, making the metal brittle and unable to restore its original state. Some plasticity
[0003] In view of the above problems, mainly by adding corrosion and fog inhibitors to the pickling solution, the generation of acid fog is suppressed, and the corrosion problem caused by over-pickling is alleviated. However, in the prior art, the effects of fog and corrosion inhibition are not Good, there is still a lot of room for improvement in terms of fog suppression and corrosion inhibition

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The anti-corrosion and anti-fogging agent is composed of the following components in proportion (total weight: 100Kg):

[0023] components

ethanol

Isopropanol

Hydrazine hydrate

M Accelerator

Surfactant

water

Weight (Kg)

15

18

25

2

8

32

Weight percentage (%)

15

18

25

2

8

32

[0024] Wherein, the surfactant is a quaternary ammonium salt cationic surfactant.

[0025] The preparation method of above-mentioned anti-corrosion and anti-fogging agent is as follows:

[0026] a. Add the above-mentioned M accelerator, ethanol, and isopropanol into the reaction kettle, and stir for 35 minutes until uniform to obtain solution A;

[0027] b, add above-mentioned water, surfactant to solution A, obtain solution B after stirring;

[0028] c. Add the above-mentioned hydrazine hydrate to the solution B, and stir for 33 minutes to obtain the finished pickling corrosion and fog inhibito...

Embodiment 2

[0034] The anti-corrosion and anti-fogging agent is composed of the following components in proportion (total weight: 100Kg):

[0035] components

ethanol

Isopropanol

Hydrazine hydrate

M Accelerator

Surfactant

water

Weight (Kg)

23

13

16

7

14

27

Weight percentage (%)

23

13

16

7

14

27

[0036] Wherein, the surfactant is polyoxyethylene ether nonionic surfactant.

[0037] The preparation method of above-mentioned anti-corrosion and anti-fogging agent is as follows:

[0038] a. Add the above-mentioned M accelerator, ethanol, and isopropanol into the reaction kettle, and stir for 30 minutes until uniform to obtain solution A;

[0039] b, add above-mentioned water, surfactant to solution A, obtain solution B after stirring;

[0040] c. Add the above-mentioned hydrazine hydrate to the solution B, and stir for 28 minutes to obtain the finished pickling corrosion and fog inhibitor. ...

Embodiment 3

[0046] The anti-corrosion and anti-fogging agent is composed of the following components in proportion (total weight: 100Kg):

[0047] components

ethanol

Isopropanol

Hydrazine hydrate

M Accelerator

Surfactant

water

[0048] Weight (Kg)

25

10

15

8

15

27

Weight percentage (%)

25

10

15

8

15

27

[0049] Wherein, the surfactant is an organic amine surfactant.

[0050] The preparation method of above-mentioned anti-corrosion and anti-fogging agent is as follows:

[0051] a. Add the above-mentioned M accelerator, ethanol, and isopropanol into the reaction kettle, and stir for 25 minutes until uniform to obtain solution A;

[0052] b, add above-mentioned water, surfactant to solution A, obtain solution B after stirring;

[0053] c. Add the above-mentioned hydrazine hydrate to the solution B, and stir for 30 minutes to obtain the finished pickling corrosion and fog inhibi...

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PUM

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Abstract

The invention discloses an acid-washing corrosion-inhibiting fog inhibitor which comprises the following components by weight: 15-25% of ethanol, 10-18% of isopropanol, 15-25% of hydrazine hydrate, 2-8% of an M promoter, 8-15% of a surfactant and the balance water. The preparation method of the acid-washing corrosion-inhibiting fog inhibitor comprises: adding the components into a reaction vessel according to priority and stirring to obtain the acid-washing corrosion-inhibiting fog inhibitor. The acid-washing corrosion-inhibiting fog inhibitor provided by the invention has corrosion inhibition rate of 98.5% or more and fog inhibition rate of 90% or more.

Description

technical field [0001] The invention relates to the technical field of fog inhibitors, in particular to a pickling corrosion inhibitor and fog inhibitor and a preparation method thereof. Background technique [0002] In the metallurgical process, the semi-finished products of precision castings must go through the pickling process to wash off the oxide skin, iron oxide scale and oil stains on the surface of the castings, and then carry out anti-rust or passivation treatment. The pickling solution reacts violently with the scale, iron oxide, phosphorus, and oil on the surface of the casting, and generates a large amount of hydrogen gas, which brings out a large amount of acid mist, which corrodes the production site, and the acid mist makes the air cloudy, seriously threatening workers of good health. In addition to acid mist pollution, the pickling process also has the problem of over-pickling. Over-pickling will corrode the casting matrix and cause loss of castings. At the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C09K3/18
Inventor 陈执祥
Owner 武汉亿强科技开发股份有限公司
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