Rust inhibitor for preventing rolling mill cavity from being corroded during strip steel production by hot continuous rolling unit

Abstract

The invention provides a rust inhibitor for preventing rolling mill cavity from being corroded during strip steel production by a hot continuous rolling unit. The rust inhibitor is composed of triethanolamine borate, melamine formaldehyde resin, polyethylene glycol, sodium benzoate, isooctanol polyoxyethylene ether and deionized water, in the rust inhibitor, the mass percentage concentration of triethanolamine borate is 60-65%; the mass percent concentration of the melamine formaldehyde resin is 1-3%, the mass percent concentration of the polyethylene glycol is 1-3%, and the mass percent concentration of the sodium benzoate is 0.1-0.5%; the mass percent concentration of the isooctyl alcohol polyoxyethylene ether is 0.1-0.5 percent; and the balance is deionized water. The invention provides a method for preventing the rolling mill cavity from being corroded in the strip steel production by the hot continuous rolling mill unit, the rust inhibiting and corrosion preventing functions of metal in the hot continuous rolling mill cavity can be improved by adopting the rust inhibitor, rust spots are inhibited, iron sheet ash is prevented from being pressed in in the strip steel production process, and the pressing-in defect of the iron sheet ash is prevented and reduced, so that the quality of strip steel products is improved.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a rust inhibitor, in particular to a rust inhibitor for preventing corrosion of a rolling mill cavity when a hot continuous rolling mill produces strip steel. Background technique [0002] The surface temperature of the steel plate during hot rolling mill production is 900°C-1300°C, the temperature inside the hot rolling mill cavity is 300°C-400°C, and the metal in the hot rolling mill cavity is carbon steel. At the same time, a large amount of cooling water is sprayed during steel rolling, forming a A high temperature and high humidity environment. [0003] The carbon steel in the cavity will be corroded in a large area in a high-temperature and high-humidity environment, and the outermost layer of the corrosion layer is loose Fe 2 o 3 At the same time, the iron powder splashed during hot rolling will be wrapped in the loose surface of the corroded layer, coupled with the high hu...

AI Technical Summary

Problems solved by technology

[0014] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a rust inhibitor for preventing the corrosion of the rolling mill cavity when the hot continuous rolling mill produces strip steel. The rust inhibitor for body corrosion should solve the technical problem that the rolling mill cavity is corroded when the hot continuous rolling mill produces strip steel in the prior art, thereby affecting the quality of the steel coil

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