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Efficient combined corrosion inhibitor and preparation method and application thereof

A corrosion inhibitor and high-efficiency technology, which is applied in the field of high-efficiency compound corrosion inhibitor and its preparation, can solve the problems of poor after-effect of corrosion-inhibition performance, unsatisfactory corrosion-inhibition effect, decreased corrosion-inhibition performance, etc. Synergistic and adaptable effect

Active Publication Date: 2016-04-13
SOUTHWEST FORESTRY UNIVERSITY
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Problems solved by technology

[0004] When a single organic compound is used as a corrosion inhibitor in nitric acid, the corrosion inhibition effect is not ideal, and the corrosion inhibition performance decreases at high temperature, and the aftereffect of corrosion inhibition performance is poor

Method used

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  • Efficient combined corrosion inhibitor and preparation method and application thereof
  • Efficient combined corrosion inhibitor and preparation method and application thereof
  • Efficient combined corrosion inhibitor and preparation method and application thereof

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preparation example Construction

[0020] The preparation method of the high-efficiency composite corrosion inhibitor of the present invention includes raw material preparation and preparation steps, specifically including:

[0021] A. Raw material preparation: prepare raw material N-heterocyclic compound, surfactant, polymer compound, auxiliary agent and nitric acid pickling solution;

[0022] B. Preparation: Add N-heterocyclic compounds, surfactants, macromolecular compounds, and auxiliary agents into the nitric acid pickling solution according to the ratio of raw materials and stir to obtain the target product.

[0023] The application of the present invention is the application of the high-efficiency composite corrosion inhibitor in the preparation of steel, petrochemical equipment, filtration, and pipeline cleaning agents.

[0024] The present invention will be further described below with specific implementation case:

[0025] Example 1 - Synergistic and efficient compound corrosion inhibitor

[0026] T...

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Abstract

The invention discloses an efficient combined corrosion inhibitor and a preparation method and application thereof. The efficient combined corrosion inhibitor comprises N-heterocyclic compounds of 0.02-1.0 g / L, surface active agents of 0.01-0.05 g / L, high-molecule compounds of 0.005-0.01 g / L, auxiliary agents of 0.01-0.05 g / L and the balance nitric acid pickling solutions. The preparation method comprises the steps of raw material preparation and preparation. According to the application, the efficient combined corrosion inhibitor can be applied to preparation of cleaning agents for steel, petrochemical equipment, boilers and pipelines. The efficient combined corrosion inhibitor has the advantages of being high in corrosion inhibition efficiency, remarkable in mutual synergistic effect, high in adaptability, good in aftereffect and high in resistance to high temperature, obviously inhibiting the corrosion effect of nitric acid to the steel, being suitable for acid pickling of the steel in the nitric acid, being suitable for cleaning of the petrochemical equipment, the boilers and the pipelines, being convenient and safe to use, being easy to operate and being fast in effect.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion inhibitor technology, and in particular relates to a high-efficiency composite corrosion inhibitor and its preparation method and application. Background technique [0002] Metal materials occupy a very important position in modern industry and agriculture, machinery, transportation, national defense and science and technology. Steel has the advantages of low price, good machining performance, and large output. It is the first metal to be considered in the process of material selection and use, and it is also one of the most widely used metals at present. However, metal materials are extremely prone to corrosion, and the damage is very serious. It is estimated that the amount of iron and steel scrapped due to corrosion is equivalent to 1 / 4-1 / 3 of the annual output in the world every year; the annual loss caused by corrosion accounts for 3.1%-4.5% of the gross domestic product (GDP). The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08
CPCC23G1/06C23G1/061C23G1/063C23G1/065C23G1/085
Inventor 李向红邓书端付惠
Owner SOUTHWEST FORESTRY UNIVERSITY
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