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Sulfuric acid pickling inhibitor and preparation method thereof

A sulfuric acid pickling and inhibitor technology, applied in the chemical industry, can solve the problems of yellow cracks and unclean pickling on the surface of the workpiece, and achieve the effects of reducing acid consumption, saving acid treatment costs, and reducing risks.

Inactive Publication Date: 2020-03-17
南京派诺金属表面处理技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since sulfuric acid pickling is based on the stripping effect of air bubbles on the surface of the substrate, the addition of corrosion inhibitors may make the surface of the workpiece pickled unclean, and the pickling of the disc may also cause problems such as crack yellowing

Method used

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  • Sulfuric acid pickling inhibitor and preparation method thereof
  • Sulfuric acid pickling inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the sulfuric acid pickling inhibitor of the present embodiment comprises the following steps:

[0019] According to the mass percentage of raw materials, 20% of sodium chloride, 3% of potassium iodide, 1% of dioctyl sulfosuccinate sodium salt, 2% of fatty alcohol polyoxyethylene ether, and 74% of water are provided. First add a certain amount of water in the reaction kettle, then add sodium chloride and potassium iodide, stir well for 30 minutes, and get the premix after the sodium chloride and potassium iodide are dissolved; then add dioctyl sulfosuccinate sodium salt, fatty alcohol polyoxyethylene ether, fully stirred for 40 minutes, and stirred into a homogeneous solution to obtain a sulfuric acid pickling inhibitor.

Embodiment 2

[0021] The preparation method of the sulfuric acid pickling inhibitor of the present embodiment comprises the following steps:

[0022] According to the mass percentage of raw materials, 30% of sodium chloride, 1% of potassium iodide, 5% of dioctyl sulfosuccinate sodium salt, 0.1% of fatty alcohol polyoxyethylene ether, and 63.9% of water are provided. First add a certain amount of water in the reaction kettle, then add sodium chloride and potassium iodide, stir well for 20 minutes, and get the premix after the sodium chloride and potassium iodide are dissolved; then add dioctyl sulfosuccinate sodium salt, fatty alcohol polyoxyethylene ether, fully stirred for 30 minutes, and stirred into a homogeneous solution to obtain a sulfuric acid pickling inhibitor.

Embodiment 3

[0024] The preparation method of the sulfuric acid pickling inhibitor of the present embodiment comprises the following steps:

[0025] According to the mass percentage of raw materials, 5% of sodium chloride, 5% of potassium iodide, 5% of dioctyl sulfosuccinate sodium salt, 5% of fatty alcohol polyoxyethylene ether, and 80% of water are provided. First add a certain amount of water in the reaction kettle, then add sodium chloride and potassium iodide, stir well for 40 minutes, and get the premix after the sodium chloride and potassium iodide are dissolved; then add dioctyl sulfosuccinate sodium salt, fatty alcohol polyoxyethylene ether, fully stirred for 20 minutes, and stirred into a homogeneous solution to obtain a sulfuric acid pickling inhibitor.

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Abstract

The invention discloses a sulfuric acid pickling inhibitor which is prepared through the following steps: 1, at first, adding quantitative water in a reaction still, then, adding sodium chloride and potassium iodide, fully stirring, and obtaining premix after dissolving sodium chloride and potassium iodide; and 2, adding sodium diethylhexyl sulfosuccinate and AEO, stirring fully to form uniform solution so as to obtain the sulfuric acid pickling inhibitor. Sodium diethylhexyl sulfosuccinate and AEO serve as penetrating agents and can promote pickling of the crack on the edges of steel wire rods; in addition, AEO can reduce corrosion of acid to the surface of rolled steel to reduce acid consumption; and joint application of sodium diethylhexyl sulfosuccinate and AEO can promote cleaning ofyellow spots on the crack while reducing acid pickling consumption.

Description

【Technical field】 [0001] The invention relates to the field of chemical industry, in particular to a sulfuric acid pickling inhibitor and a preparation method thereof. 【Background technique】 [0002] With the increase of environmental protection pressure, waste acid treatment becomes more and more difficult, and the treatment cost is higher and higher. Reducing the consumption of acid during production and reducing the output of waste acid are the concerns of every manufacturer at present. Since sulfuric acid pickling relies on the peeling effect of air bubbles on the surface of the substrate, adding a corrosion inhibitor is likely to make the surface of the workpiece unclean, and it may also cause problems such as yellowing of the cracks during pickling. [0003] It can be seen that providing an improved method is an urgent problem to be solved in the art. [Content of the invention] [0004] In view of the above problems, the present invention provides a sulfuric acid p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/04C23G1/08
CPCC23G1/04C23G1/081
Inventor 石琴
Owner 南京派诺金属表面处理技术有限公司
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