Acidic normal temperature degreasing agent and preparation method thereof

Abstract

The invention discloses an acidic normal temperature degreasing agent and a preparation method thereof. The degreasing agent comprises the following components and contents (g / L): 20-30 g / L of LAS (Linear Alkylbenzene Sulphonic Acid), 10-20 g / L of SAS (Secondary Alkyl Sulfonate), 80-120 g / L of sodium tripolyphosphate, 2-3 g / L of hexamethylene tetramine, 10-20 g / L of AOS (Alpha-Olefin Sulfonate), 5-15 g / L of alkanol amide, 0.5-2 g / L of EDTA (Ethylene Diamine Tetraacetic Acid) and 2-5 g / L of lauryl sodium sulfate. When in preparing, the method comprises the following steps of: heating purified water of 1 / 3 weight of the required preparation amount to about 60 DEG C; pouring into a stirring kettle; respectively adding the materials to the stirring kettle according to proportion to be stirred and dissolved under the condition of normal temperature and normal pressure and the rotating speed of 40-100r / min; and then adding the purified water to the required amount, and stirring adequately and uniformly. The degreasing agent is characterized in that oil is washed with acid in one step; the surface of a workpiece is not corroded even if the dipping time of the workpiece is long; and because lots of foams are on the tank liquor surface, the volatilization of an acid liquor can be inhibited, and the environmental pollution and the damage to a human body are reduced.

Description

technical field [0001] The invention relates to an acidic normal-temperature degreasing agent for surface treatment of iron and steel materials and a preparation method. Background technique [0002] Iron and steel workpieces need to be degreased before electroplating, painting, phosphating, and blueing, and then pickled to remove rust (scale, etc.). In the pickling process, the high content of strong acid is likely to cause over-corrosion, and there is acid volatilization at room temperature or medium temperature, which will pollute the surrounding environment and cause great harm to the human body. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an acidic normal temperature degreasing agent for surface treatment of iron and steel materials and a preparation method. Used in conjunction with acid at room temperature, it can complete degreasing and pickling at the same time, saving one process. The degreasing ag...

AI Technical Summary

Problems solved by technology

In the pickling process, the high content of strong acid will easily cause over-corrosion, and there will be acid volatilization at room temperature or medium temperature, which will pollute the surrounding environment and cause great harm to the human body.

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