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Silicon steel pickling promoter and preparation method thereof

A technology of pickling accelerator and silicon steel acid, which is applied in the field of steel surface pickling, can solve the problems that the pickling efficiency is not as good as that of hydrochloric acid pickling, and the pickling accelerator is inconvenient to use, so as to reduce the generation of acid mist, improve the cleaning quality, Ease of use

Inactive Publication Date: 2014-01-22
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Special reports on silicon steel pickling accelerators include: "Steel Pickling Accelerator" (CN 1408901A) patented technology is mainly applicable to silicon steel pickling process, this technology mainly focuses on how to increase the pickling rate to accelerate the removal of silicon steel surface oxide scale, However, there is no explanation on how to effectively protect the silicon steel substrate during the pickling process; the patented technology of "a sulfuric acid pickling descaling accelerator" (CN93115819.2) is composed of a two-component mixture of A and B, and exists The main problem is that the pickling accelerator is inconvenient to use, and it is mainly used in the sulfuric acid pickling process, and the pickling efficiency is not as good as hydrochloric acid pickling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A silicon steel pickling accelerator and a preparation method thereof. The silicon steel pickling accelerator is mixed under normal temperature conditions according to the following components and their contents, and stirred evenly to obtain the silicon steel pickling accelerator:

[0030] The corrosion inhibitor is 0.1~1.4wt%; the inorganic salt reducing agent is 10.0~20.0wt%;

[0031] Emulsifier: 2.3~5.0wt%; Organic metal ion chelating agent: 5.0~9.0wt%;

[0032] The defoamer is 2.5~5.0wt%; the synergist is 0.1~1.5wt%;

[0033] Water is 63.0~80.0wt%.

[0034] In this embodiment: the corrosion inhibitor is sodium nitrite; the inorganic salt reducing agent is sodium thiosulfate; the emulsifier is op-10; the organometallic ion chelating agent is sodium gluconate; the defoamer is polydimethylsiloxane Alkane; synergist is ethylene glycol.

[0035] The method of using the silicon steel pickling accelerator prepared in this example is: add the product prepared in this ex...

Embodiment 2

[0037] A silicon steel pickling accelerator and a preparation method thereof. Except following composition, all the other are with embodiment 1:

[0038] In this embodiment: the corrosion inhibitor is sodium silicate; the inorganic salt reducing agent is sodium sulfite; the emulsifier is op-10; the organic metal ion chelating agent is EDTA; the defoamer is polysiloxane; alcohol.

[0039] The use method and use effect of the silicon steel pickling accelerator prepared in this example are the same as in Example 1.

Embodiment 3

[0041] A silicon steel pickling accelerator and a preparation method thereof. Except following composition, all the other are with embodiment 1:

[0042] In the present embodiment: corrosion inhibitor is sodium benzoate and sodium nitrite; Inorganic salt reducing agent is sodium thiosulfate; Emulsifier is sodium dodecylbenzene sulfonate; Organic metal ion chelating agent is sodium tartrate; Defoamer It is polyether modified silicon; the synergist is glycerol.

[0043] The use method and use effect of the silicon steel pickling accelerator prepared in this example are the same as in Example 1.

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Abstract

The invention specifically relates to a silicon steel pickling promoter and a preparation method thereof. According to a technical scheme in the invention, the silicon steel pickling promoter is prepared from 0.1 to 5.0 wt% of a corrosion inhibitor, 10.0 to 50.0 wt% of an inorganic salt reducing agent, 0.1 to 5.0 wt% of an emulsifier, 5.0 to 20.0 wt% of an organic metal ion chelating agent, 0.1 to 5.0 wt% of a defoaming agent, 0.1 to 5.0 wt% of a synergist and 20.0 to 80.0 wt% of water through uniform mixing at normal temperature with stirring. The silicon steel pickling promoter provided by the invention has the characteristics of convenience in usage, high pickling efficiency, low cost, environment friendliness, a good corrosion inhibition effect, etc.

Description

technical field [0001] The invention belongs to the technical field of steel surface pickling. Specifically relates to a silicon steel pickling accelerator and a preparation method thereof. Background technique [0002] Metal surface derusting is an essential process in the metal processing and machinery manufacturing industries. Improving the speed of metal surface treatment can significantly improve production efficiency. After the steel is treated at high temperature, a layer of dense oxide scale will be formed on the surface. These oxide scales are mainly various oxides containing iron. From the inside to the outside, they are the base material, ferrous oxide, iron oxide and ferric oxide. The commonly used pickling solution is mainly prepared by hydrochloric acid. Although hydrochloric acid derusting has the characteristics of fast speed and good quality, it is easy to corrode the steel substrate. When hydrochloric acid corrodes steel substrates, because the pickling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/04
Inventor 伍林秦悦易德莲胡适潘琦童坤秦晓蓉
Owner WUHAN UNIV OF SCI & TECH
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