Wet leveling liquid for cold-rolled thin plate

Abstract

The invention relates to wet leveling liquid for a cold-rolled thin plate. A preparation method of the wet leveling liquid comprises the following steps: (1) using inorganic acid, respectively dissolving by using water, throwing organic amine and ethylenediamine tetraacetic acid tetrasodium salt into a kettle in sequence, and reacting; (2) heating to a constant temperature of 80-90 DEG C, adding an antirust agent and another antirust agent, and then circularly stirring for 10-30 minutes; (3) cooling to 50-60 DEG C, adding an emulgator and an anti-foaming agent, and then circularly stirring for 10-30 minutes; (4) cooling to 50-60 DEG C, adding a surfactant and an anti-foaming agent, adding deionized water, and circularly stirring for 20 minutes. The wet leveling liquid has good anti-rust property and corrosion resistance, can effectively protect good cleaning of a working roller, the cleanness of a steel belt is improved, debris formation on the roller is prevented, the fouling of the working roller can be reduced, a reduction rate is effectively controlled, slippage is avoided, compatibility with steel plate coating oil is realized, and grease / oil pollution is prevented.

Description

technical field [0001] The invention belongs to the field of lubricating oil, in particular to a wet leveling liquid for cold-rolled sheets. Background technique [0002] Galvanized steel strip has the following advantages after being flattened: [0003] 1. Make the coating surface smoother. [0004] The surface of the strip after coating is required to be smooth and flat. There are spangles on the surface of the coating. Due to the segregation of the components when the zinc liquid crystallizes, the zinc layer is raised at the place where it solidifies first, and the place where it solidifies later is concave due to the shrinkage of the zinc volume. If such strips are coated, these unevennesses will still show up on the coated surface. In order to completely eliminate these grooves, the strip on the surface of the small spangles can be further leveled, and a uniform surface can be obtained after leveling. [0005] 2. Make the coating and strip steel structure stronger. ...

AI Technical Summary

Problems solved by technology

[0008] In my country, due to the gap in understanding and the backwardness of technology and technology, the wet leveling liquid produced by domestic manufacturers is still dominated by nitrite inorganic wet leveling liquid. This kind of wet leveling liquid generally has the following shortcomings and deficiencies: 1. Poor anti-rust cleaning performance; 2. Health and environmental safety problems caused by nitrite

High-quality organic wet leveling liquid with excellent anti-rust cleaning performance, safe and hygienic quality, which cannot meet the needs of some steelmaking enterprises such as Baosteel