Boric sulphate rust remover for electrolysis

Abstract

The invention provides a boric sulphate rust remover for electrolysis. The rust remover comprises the following preparation steps that 1, nonyl phenol or nonyl phenol polyoxyethylene is thrown into areaction kettle, and heated to 100-150 DEG C, then boric acid is added slowly, and after adding is completed, the reaction is carried out for 100-140 minutes; 2, after the reaction is completed, the temperature is lowered to 60-100 DEG C, a booster is added, and the temperature is naturally lowered to normal; 3, S2O3 or SO3 is added slowly in vacuum, stirring is carried out while the S2O3 or the SO3 is added, after adding is completed, the temperature is raised to 50-90 DEG C, and the reaction is carried out for 100-180 minutes; and 4, after the reaction is completed, the temperature is lowered below 50 DEG C, the booster is added, the reaction is carried out for 100-180 minutes, then molybdate is added to obtain the rust remover. The rust remover has a rapid and thorough rust removing ability, the rust removing effect is better than that of a strong acid rust remover or a nitrogen and phosphorus rust remover, and the rust remover is environmentally friendly, and has no toxic and sideeffect on the human body.

Description

technical field [0001] The invention relates to the technical field of rust removal, in particular to a boron sulfate rust remover for electrolysis. Background technique [0002] Materials such as ferrous metals and non-ferrous metals are prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal process of painting and bonding. Necessary economic loss. [0003] The first generation of rust remover is a strong acid, which can chemically react with rust and metal oxides to form soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, the acid can react with the base metal to release hydrogen. Hydrogen 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: a large amount of hydrogen gas in the proc...

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Problems solved by technology

[0002] Materials such as ferrous metals and non-ferrous metals are prone to rust when placed outdoors or in the open air, which not only affects the appearance quality, but also affects the normal process of painting and bonding. necessary economic loss

[0003] The first generation of rust remover is a strong acid, which can chemically react with rust and metal oxides to form soluble salts, so as to achieve the purpose of rust removal. At the same time of rust removal, the acid can react with the base metal to release hydrogen. Hydrogen 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: a large amount of hydrogen gas in the process The generation of hydrogen embrittlement will cause the steel to produce 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 , increase the processing cost; this kind of acid will cause excessive corrosion of 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 second-generation rust remover is a chemical substance containing nitrogen and phosphorus. Although it can overcome the disadvantages of the first-generation rust remover, such as being harmful to the human body, producing acid mist, and corroding the substrate, it is easy to enter the water system and cause eutrophication.

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