Corrosion inhibitor

A corrosion inhibitor and corrosion inhibition technology, applied in the field of corrosion inhibitors, can solve problems such as poor corrosion inhibition rate, short service life, and darkening of thin plates, and achieve the effects of avoiding deep corrosion, brightening the surface, and prolonging the life of hydrochloric acid

Inactive Publication Date: 2011-04-13
JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of pickling corrosion inhibitors at home and abroad, but when they are used in the continuous pickling process o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Experimental conditions: heating in a constant temperature water bath at 80°C, hydrochloric acid mass concentration of 25%, the material of the experimental steel plate is Q235, and the corrosion grade is B. The experimental results are as follows:

[0034]

[0035] Surface Quality

[0036] It can be seen from the above data that while the present invention has a high corrosion inhibition effect, it has no influence on the cleaning speed. The steel sheet after pickling is bright, and there is no phenomenon such as hanging dust.

Embodiment 2

[0038] In order to further illustrate the effect of the present invention, it will be described in conjunction with the following practical applications.

[0039] This product is used in the continuous pickling process of Wuxi Xindazhong Sheet Co., Ltd., and the dosage is 4‰ of the mass of hydrochloric acid. According to the survey, compared with the "pickling corrosion inhibitor" of the Japanese company, the thin plate after pickling of the present invention is brighter, and at the same time prolongs the service life of the acid solution to 1-2 cycles. The results show that the invention can effectively improve the product quality and save the production cost when it is applied in the cold-rolled sheet pickling process.

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PUM

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Abstract

The invention relates to a corrosion inhibitor, which is mainly used for corrosion inhibition in a continuous acid cleaning technology of a cold-rolled sheet. The corrosion inhibitor comprises the following components in percentage by weight: 10-25% of hexamine, 0-10% of vinylamine, 0-10% of ethanolamine, 0-3% of alkynol alkoxylate, 0-4% of oxalic acid, 2-5% of additive and 43%-88% of water. The corrosion inhibitor can effectively inhibit corrosion, improve the brightness of the surface of a sheet, prolong the use period of an acid liquid and has a certain rust-proof property.

Description

technical field [0001] The invention relates to a corrosion inhibitor, in particular to the corrosion inhibition in the continuous pickling process of cold-rolled thin plates, and belongs to the technical field of steel products and material surface treatment industries. Background technique [0002] With the development of science and technology, industries such as automobiles and home appliances have higher and higher demands on the quality and quantity of cold-rolled sheets. In recent years, the domestic cold-rolled sheet industry has been greatly developed. At present, continuous pickling production lines are generally used for cold-rolled sheets. The pickling tank is generally divided into three sections, and continuous pickling is carried out at a temperature above 70°C using hydrochloric acid with a concentration of about 25% or more. Pickling under high temperature and high acidity conditions, it is very important to prevent hydrochloric acid from over-pickling the t...

Claims

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Application Information

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IPC IPC(8): C23G1/06
Inventor 邢丹丹郑建匡登云吕明春
Owner JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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