Steel and iron chemical oil removing powder and preparing and using methods thereof

Abstract

Steel and iron chemical oil removing powder comprises, by weight, 5-10 g of sodium hydroxide, 40-50 g of sodium carbonate, 0.5-1 g of EDTA disodium, 8-10 g of sodium tripolyphosphate, 1-2 g of a washing assisting agent, 20-30 g of a metal protecting agent and 5.5-8.5 g of a surface active agent. A preparing method of the oil removing powder includes the following steps that sodium hydroxide, sodium bicarbonate, EDTA disodium and sodium tripolyphosphate are mixed and stirred uniformly so that A powder can be obtained; and the washing assisting agent, the metal protecting agent and the surface active agent are added into the A powder at a time, and after uniform stirring is performed, the finished oil removing powder can be obtained. A using method of the oil removing powder includes the following steps that warm water is added in a cleaning tank, and temperature is 40-70 DEG C; and 4-8% of the oil removing powder is added into the warm water and is stirred till complete dissolving is achieved. The surface of steel and iron cleaned through the oil removing powder is free of a visible oil film or oil spots, meanwhile, the using amount of the oil removing powder is small, and the steel and iron chemical oil removing powder is economical, non-toxic and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of cleaning agents, and in particular relates to a chemical degreasing powder for steel and its preparation and use methods. Background technique [0002] After the hot-rolled steel plate goes through the cold-rolling process, impurities such as residual rolling oil, iron powder, leaked hydraulic oil, and gear oil are attached to the surface of the cold-rolled steel plate. In order to improve product quality, the surface of the steel plate must be cleaned before the bell furnace annealing process clean. As the largest steel-producing country in the world, my country also ranks first in the output of cold-rolled steel plates in the world, so the market demand for degreasing powder for cleaning steel plates after rolling is also huge. The degreasing effect will directly affect the quality of the plating and coating. Traditional high-temperature chemical degreasing, organic solvent degreasing, electrochemical...

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Problems solved by technology

Alkaline degreasing powder mainly has the problems of poor degreasing ability, too large foam and easy precipitation of surfactant; phosphorus-free degreasing powder mainly has the problems of poor degreasing ability and high cost