Preparation method for multifunctional purifying solution

Abstract

The invention relates to a preparation method for a multifunctional purifying solution applicable to surface cleaning of steel. The objective of the invention is to overcome the problem that normal-temperature oil removal and rust removal are hard to implement at the same time in traditional steel surface pretreatment fields. The method comprises the following steps: 1, preparation of hydrochloricacid; 2, preparation of phosphoric acid; 3, preparation of the surfactant OP-10; 4, preparation of EDTA; and 5, preparation of the purifying solution. The multifunctional purifying solution preparedby using the method can rapidly realize simultaneous oil removal and rust removal of steel surfaces at normal temperature and has a low corrosion rate (0.09%) and short oil removal and rust removal time (7-8 min); and the wetting angle of a steel plate treated by using the purifying solution is reduced by 26 degrees compared with the wetting angle of the steel plate before treatment. The multifunctional purifying solution is applicable to the field of steel surface treatment.

Description

technical field [0001] The invention relates to a preparation method of a multifunctional purification liquid. Background technique [0002] The rapid and stable development of the economy is inseparable from the development of industry. Industrial technology largely depends on each link of the processing process. The cleaning step of the surface of various metal materials in the process of processing is a very important link. The surface cleaning of metal materials is to use physical or chemical means to remove dirt on the surface, such as: oil, rust and various residues, etc., to ensure the smooth progress of subsequent steps of metal materials. Purification solution refers to a solution that chemically prepares a suitable solvent to dissolve stains on the steel surface to achieve a cleaning effect. The purification solution is also used for the pretreatment of the blackening and bluing process of the surface of the steel parts. The surface of the steel is oxidized by oxi...

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Problems solved by technology

Generally, this kind of film is very thin, so in order to obtain a dense and anti-rust film, the surface treatment of the steel material must be carried out before the oxidation operation, and the oil and rust on the steel surface must be cleaned to ensure a good oxide film. , if the surface of the steel material is not cleaned cleanly, an incomplete and uneven oxide film will be formed, and the corrosion resistance will be poor during use, the film will be easily rubbed off, and corrosion will occur, which cannot achieve the purpose of rust prevention

[0003] In response to the above problems, various purification solutions for degreasing and rust removal have been developed. However, these purification solutions have more or less defects. For example, rusty steel with oil stains needs to be cleaned in multiple steps. Or it needs to reach a specific temperature to have a better cleaning effect, or the purification solution itself has a greater degree of corrosion on steel

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