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Cold-rolling acid-pickling corrosion inhibitor and preparation method thereof

A technology of pickling corrosion inhibitor and corrosion inhibitor, which is applied in the field of metal surface treatment, can solve the problems of low corrosion efficiency, large dosage, poisonous and harmful, and achieve the effect of simple synthesis method, low dosage and reduction of acid mist

Active Publication Date: 2018-12-11
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional corrosion inhibitors generally have disadvantages such as large addition amount, acid mist, high cost, toxicity and harm, and low corrosion efficiency under high temperature and strong acid conditions. Cold Rolled Pickling Corrosion Inhibitor

Method used

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  • Cold-rolling acid-pickling corrosion inhibitor and preparation method thereof
  • Cold-rolling acid-pickling corrosion inhibitor and preparation method thereof
  • Cold-rolling acid-pickling corrosion inhibitor and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of cold rolling pickling corrosion inhibitor, its preparation method comprises the steps:

[0027] 1) Add vitamin B3 and organic amine (myristylamine) to ethanol at a molar ratio of 1:1, and mix well;

[0028] 2) Thionyl chloride was added to the obtained reaction solution, heated to 70°C for 4 hours, then stirred at room temperature for 3.5 hours, and the alcohol solvent was distilled off to obtain the cold rolling pickling corrosion inhibitor.

Embodiment 2

[0030] A kind of cold rolling pickling corrosion inhibitor, its preparation method comprises the steps:

[0031] 1) Add vitamin B3 and organic amine (myristylamine) to ethanol at a molar ratio of 1:1.5, and mix well;

[0032] 2) Thionyl chloride was added to the obtained reaction solution, heated to 70°C for 4 hours, then stirred at room temperature for 3.5 hours, and the alcohol solvent was distilled off to obtain the cold rolling pickling corrosion inhibitor.

Embodiment 3

[0034] A kind of cold rolling pickling corrosion inhibitor, its preparation method comprises the steps:

[0035] 1) Add vitamin B3 and organic amine (myristylamine) to ethanol at a molar ratio of 1.5:1, and mix well;

[0036] 2) Thionyl chloride was added to the obtained reaction solution, heated to 70°C for 4 hours, then stirred at room temperature for 3.5 hours, and the alcohol solvent was distilled off to obtain the cold rolling pickling corrosion inhibitor.

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Abstract

The invention discloses a cold-rolling acid-pickling corrosion inhibitor. The cold-rolling acid-pickling corrosion inhibitor is prepared by sequentially performing condensation reaction and constant-temperature stirring reaction on vitamin B3 and organic amine in a molar ratio of (1.5 to 1) to (1 to 1.5), performing distillation and removing a solvent, wherein the carbon number of the organic amine is 8 to 16. According to the cold-rolling acid-pickling corrosion inhibitor disclosed by the invention, reaction between the vitamin B3 and the organic amine is carried out so as to synthesize a novel corrosion inhibitor for the first time, and the organic amine is applied to the processes including cold rolling and acid pickling and the like, so that the advantages of less consumption, high corrosion inhibition efficiency and the like are achieved, the surface quality of steel plates subjected to acid pickling can be effectively promoted, quality defects such as no black spots and darkeningare avoided, and a brand new means is provided for a high-efficient clear process; moreover, the preparation method disclosed by the invention is simple, the cost is low, and the cold-rolling acid-pickling corrosion inhibitor has important popularization and application value.

Description

technical field [0001] The invention belongs to the technical field of metal surface treatment, and in particular relates to a cold rolling pickling corrosion inhibitor and a preparation method thereof. Background technique [0002] Generally, the cold-rolling production line of large iron and steel groups adopts hydrochloric acid shallow tank continuous pickling technology to remove the oxide scale on the surface of cold-rolled strip steel, adjust the coil weight, and provide qualified billets to the rolling mill to ensure that the cold-rolling mill can smoothly produce qualified strip steel product. The concentration of acid solution used in this pickling technology is generally about 15%, and the use temperature is 80±5°C. Moreover, when pickling is carried out according to the conventional pickling process in the pickling process, quality defects such as black spots and darkening will appear on the surface. [0003] In order to avoid excessive consumption of metal or a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08
CPCC23G1/063C23G1/08
Inventor 程鹏黄先球庞涛郎丰军彭浩马颖李江文宋建红何嘉
Owner 武汉钢铁有限公司
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