Preparation method and using method for metal rust remover

Abstract

The invention belongs to the field of chemical rusting of metal surface treatment, and particularly relates to a preparation method and a using method for a metal rust remover. The preparation methodincludes the following steps that (1) phosphorous acid, tartaric acid and benzoic acid are used as raw materials to be mixed with deionized water to prepare basic acid liquor; (2) solid raw materialsincluding zinc sulfate, seignette salt, aluminum sulfate and potassium stannous phosphate sulfate are added into the basic acid liquor to be evenly mixed and stirred; and (3) auxiliaries composed of ametal ion chelating agent, naphthenic acid, triethanolamine, a corrosion inhibitor, a surface active agent, an emulgator, an antifreezing agent and vegetable oil are added to be evenly mixed and stirred. The preparation method and the using method are simple in step, the preparing cost is low, the prepared metal rust remover can effectively remove rust on the metal surface, a protection film canbe formed, and further application and popularization can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical rust removal for metal surface treatment, and in particular relates to a preparation method and a use method of a metal rust remover. Background technique [0002] In the process of metal production and use, the surface is often eroded by factors such as the environment, resulting in rust on the metal surface, and once rust occurs, the performance of the metal is often greatly reduced, and the corroded material not only reduces the performance, but also in some It can't be used at all under certain circumstances, so it is necessary to derust the surface of the metal, and a rust remover with good performance is essential. [0003] At present, there are two types of rust removal methods in the industry: mechanical method and chemical method. Due to the high labor intensity, low efficiency, and serious dust pollution of mechanical methods, except for a few cases, chemical methods are generally used for metal...

AI Technical Summary

Problems solved by technology

Due to the high labor intensity, low efficiency and serious dust pollution of the mechanical method, except for a few cases, chemical methods are generally used for metal derusting.

The simplest method for metal chemical rust removal is to use hydrochloric acid or sulfuric acid to treat the rust on the metal surface. In terms of rust removal effect, hydrochloric acid is higher than sulfuric acid, but it has one of the most fatal shortcomings: in the production process, hydrochloric acid It is volatile and produces a large amount of acid mist, which not only deteriorates the operating environment, but also causes certain corrosion to the surrounding steel structures and related equipment

Whether it is hydrochloric acid rust removal or sulfuric acid rust removal, there are the following problems: in the later period of use of the above-mentioned acid solution rust remover, as the acid concentration decreases and the ferrous concentration increases, the rust removal speed will become very slow. At this time, even if the acid concentration is increased, the effect is not great. Under this situation, if you want to completely remove the rust, you have to completely replace the acid solution in the acid tank. Therefore, simply using acid to remove rust will cause a large amount of acid solution to be wasted. , which is not good for the environment, and the production cost of the enterprise is also high

[0004] The Chinese patent with the notification number CN105331988B discloses a metal rust remover material composition and a preparation method of the metal rust remover. Although it has a good rust remover effect, it is volatile and produces a large amount of acid in the production process of hydrochloric acid. Fog, which not only deteriorates the operating environment, but also causes certain corrosion to the surrounding steel structures and related equipment