Finishing liquid for hot-galvanized plate and preparation method for finishing liquid

Abstract

The invention relates to finishing liquid for a hot-galvanized plate and a preparation method for the finishing liquid. The finishing liquid comprises a component I and a component II, wherein the component I comprises following ingredients in parts by weight: 23-33 parts of water, 5-8 parts of dibasic acid, 8-12 parts of tricarboxylic acid and 54-57 parts of triethanolamine; the component II comprises following ingredients in parts by weight: 47-68 parts of water, 4-8 parts of sodium carbonate, 3-5 parts of potassium hydroxide, 2-4 parts of disodium ethylenediamine tetraacetate, 6-10 parts of sodium metasilicate pentahydrate, 8-12 parts of reverse block polyether, 6-8 parts of neodecanoic acid and 3-6 parts of sodium benzoate. The finishing liquid has relatively good rust-proof and lubricating effects, has excellent wetting and cleaning properties and relatively high cleaning ability, and can lubricate and repair the surface of a roll; the finished galvanized plate is smooth in surface, and defects of finishing spots and coating moire can be effectively eliminated or reduced; the finishing liquid has good foam-inhibiting and defoaming functions, so that liquid can be avoided from remaining on the surfaces of the roll and a steel plate and the foam can be avoided from overflowing around to affect the working environment.

Description

technical field [0001] The invention relates to the field of iron and steel industry, in particular to a skin pass solution for hot-dip galvanized sheets and a preparation method thereof. Background technique [0002] At present, with the development of the iron and steel industry, the production technology of hot-dip galvanized sheet in the iron and steel industry has developed rapidly. The rapid development of hot-dip galvanized technology makes the surface quality comparable to that of cold-rolled sheet and electro-galvanized sheet. Hot-dip galvanized products are used in the fields of automobiles and household appliances. Widely used, especially the amount of hot-dip galvanized sheets for automobiles has also increased sharply, and the production technology of hot-dip galvanized sheets for automobiles is constantly improving. my country has become the world's largest producer of hot-dip galvanized sheets. While vigorously improving the productivity of hot-dip galvanized ...

AI Technical Summary

Problems solved by technology

[0006] When skin-passing hot-dip galvanized sheets in existing skin-passing machines, zinc particles or other impurities adhering to the skin-passing support rolls will also be copied to the work rolls. The tighter combination will become more and more difficult to eliminate, resulting in skinning bright spots and skinning roll marks. Therefore, high-pressure water is used behind the skinning machine to wash the roll gap and roll surface in time. Because the rolling mill, rolls and steel plates are all For ferrous metals, long-term washing with water will cause corrosion of rolling mills, rolls and steel plates