A kind of novel derusting liquid and preparation method thereof

Abstract

The invention relates to a rust removal liquid, in particular to a novel rust removal liquid and a preparation method thereof. The novel rust removal liquid comprises the following components: industrial sulfuric acid, hydrochloric acid, citric acid, phosphoric acid, tartaric acid, straw ash, urotropine, lauryl sodium sulfate, sodium chloride, polyethylene glycol, mesoporous silicon dioxide, gluconic acid, water-soluble imidazoline, magnesium chloride, lauryl alcohol polyoxyethylene, coconut oil fatty acid, polystyrene microspheres, phenothiazine, and the balance being water. The novel rust removal liquid can efficiently and completely remove rust on a metal surface within short time, and also can guarantee that the rust-removed metal does not rust within a long time, so that the rust-removal metal surface does not have rust, and is smooth. The novel rust removal liquid is simple in preparation method, is low in raw material price, is low in cost and is suitable for large-scale production. While reducing the cost, the rust removal liquid can effectively inhibit acid mists to reduce the surface treatment quality, and has a wide market economic prospect.

Description

technical field [0001] The invention relates to a rust removing liquid, in particular to a novel rust removing liquid and a preparation method thereof. Background technique [0002] Metal is prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal progress of painting, bonding and other processes. If it is not handled in time, it will cause scrapping of materials and unnecessary economic losses. [0003] Traditional chemical rust removal usually uses strong acid, which can chemically react with rust and metal oxides to generate soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, acid can react with base metal to release hydrogen, hydrogen It can generate pressure on rust and insoluble scale, which is beneficial to their peeling and reduction of high-valent iron, and accelerates the pickling process, but the traditional acid treatment method also has obvious def...

AI Technical Summary

Problems solved by technology

[0002] Metal is prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal progress of painting, bonding and other processes. If it is not handled in time, it will cause scrapping of materials and unnecessary economic losses

[0003] Traditional chemical rust removal usually uses strong acid, which can chemically react with rust and metal oxides to generate soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, acid can react with base metal to release hydrogen, hydrogen It can generate pressure on rust and insoluble scale, which is beneficial to their peeling and reduction of high-valent iron, and accelerates the pickling process, but the traditional acid treatment method also has obvious defects: that is, the large amount of hydrogen gas in the process The occurrence of hydrogen embrittlement will cause the steel to have hydrogen embrittlement, which will cause the mechanical properties of the metal to decline and affect the strength of the steel itself; at the same time, it is easy to form acid mist, which will affect the health of the operator and corrode the surrounding equipment and environment; the consumption of acid is also large. Increases disposal costs; these acids can over-corrode steel

In addition, the residues produced in large quantities need to be discharged frequently, which not only seriously corrodes industrial pipelines, but also pollutes the soil and the environment.

[0004] The patent application number is 201110328601.1 discloses a iron and steel derusting solution, its components include oxalic acid, triethanolamine, phosphoric acid, hydrochloric acid, fatty alcohol polyoxyethylene ether, hexamethylenetetramine and water, and its derusting speed is relatively slow , the rust removal takes a long time, and the metal secondary corrosion time is short after rust removal, and the rust removal effect is not good

[0005] The patent application number 201310569957.3 discloses a rust removal solution, including hydrochloric acid 36.2%-74.5%, dilute sulfuric acid 9%-35%, sodium dodecylbenzenesulfonate 2%-11%, hydrogen peroxide 1%-7.5% , triethanolamine 1%-5%, citric acid 0.3%-2%, sodium chloride 0.6%-3%, acetone 5%-35%, however, the effect of rust removal is not ideal, and the efficiency of rust removal is low. Second rust removal, resulting in a reduction in work efficiency

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