Corrosion inhibitor

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...

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 of thin plates, most of them have defects such as poor corrosion inhibition rate, short service life, and darkening of thin plates after pickling.