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Efficient environment-friendly rust remover as well as preparation method and application thereof

A rust remover, an environmentally friendly technology, applied in the field of metal surface treatment, can solve the problems of pollution, vulnerable steel, poor rust removal effect, etc., and achieve the effect of high efficiency, short time, and shortened rust removal time

Active Publication Date: 2021-05-14
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the present invention is exactly in order to solve the pollution that chemical reagent iron and steel derusting exists, derusting effect is not good and the problem of easily damaged steel, and provides a kind of high-efficiency environment-friendly derusting agent and its preparation method and application

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  • Efficient environment-friendly rust remover as well as preparation method and application thereof
  • Efficient environment-friendly rust remover as well as preparation method and application thereof
  • Efficient environment-friendly rust remover as well as preparation method and application thereof

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Embodiment Construction

[0049] The present invention will be described in detail below in conjunction with specific examples, but it is by no means a limitation of the present invention.

[0050] The invention provides a high-efficiency and environment-friendly derusting agent, which is composed of the following raw material components: organic acid, phosphoric acid, Schiff base, corrosion inhibitor, auxiliary agent, and the remaining water makes up 100%.

[0051] Among them, organic acids include hydroxyethylidene diphosphoric acid, p-toluenesulfonic acid, and citric acid.

[0052] The corrosion inhibitor is rhodin and / or thiourea;

[0053] Schiff's base is prepared by the following method: stir and dissolve vanillin with absolute ethanol, then heat up to 60°C, add isoniazid in absolute ethanol dropwise, heat up to 70°C and keep for 3 hours, cool to room temperature, and filter to obtain yellow crystals , and finally recrystallized three times with absolute ethanol to obtain the Schiff base.

[00...

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Abstract

The invention relates to an efficient environment-friendly rust remover and a preparation method and application thereof, and belongs to the technical field of surface treatment. The efficient environment-friendly rust remover is composed of HEDP, p-toluenesulfonic acid, citric acid, phosphoric acid, water, Schiff base, corrosion inhibitors and auxiliaries, wherein, in percentage by weight, 10.1-16.2% of organic acid, 5-9% of phosphoric acid, 0.5-1% of Schiff base, 0.1-0.5% of corrosion inhibitors, 1-5% of auxiliaries and the balance of water. The rust remover can quickly remove floating rust, heavy rust and oxide skin of different degrees on the surface of steel; and after rust removal and scale removal, the steel does not generate hydrogen embrittlement, and a traditional hydrochloric acid type cleaning agent can be replaced.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a high-efficiency and environment-friendly rust remover and its preparation method and application. Background technique [0002] Iron and steel is an important pillar industry of the national economy and plays an important role in social development and economic construction. When exposed to high temperature air for a long time, the surface of steel will be oxidized to form a dense oxide scale. Due to the difference in steel processing technology and model in actual production, the composition, thickness and porosity of scale will be different. Generally speaking, the bottom layer of the carbon steel oxide scale formed at high temperature is closely connected with the base material is loose and porous ferrous oxide (FeO), and the middle layer is ferric oxide (FeO) with cracks showing glassy fractures. 3 o 4 ), the outer layer of oxide skin is iron oxide (Fe 2...

Claims

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Application Information

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IPC IPC(8): C23G1/08C23G1/06
CPCC23G1/088C23G1/061C23G1/065
Inventor 唐佳斌姚逸和蒋继波丛海山孙冉黄星孔玥郭曼利张舒涵陈宇凯
Owner SHANGHAI INST OF TECH