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Steel rust inhibitor and preparation method and application thereof

A rust inhibitor and steel technology, which is applied in the field of steel rust resistance, can solve the problems of anti-corrosion performance indicators such as zero pollutant discharge and mass discharge, which cannot be taken into account, and achieve excellent rust resistance performance, simple preparation process, and long-term effects.

Active Publication Date: 2018-07-31
NEIJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic rust inhibitors currently occupying a major market share, such as amines, alcohol amines and fatty acids, still have anti-corrosion performance indicators and zero pollutant discharge according to the requirements of sustainable recycling of marine resources in the "China Marine Environmental Quality Bulletin" Unable to make overall plans, non-toxic and environmental protection has thus become an unavoidable bottleneck restricting the development of rust inhibitors in the future

Method used

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  • Steel rust inhibitor and preparation method and application thereof
  • Steel rust inhibitor and preparation method and application thereof
  • Steel rust inhibitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is 2-isolongifolene hydrazino-4-(2-oxo Substituent-2H-benzopyran-3-yl)thiazole, the medium is 3.5% sodium chloride solution, add 2-isolongifolenonehydrazino-4-(2-oxo-2H-benzopyran- The effective content of 3-yl)thiazole is 1 mmol / L, the temperature is 25°C, and the pH=12.5.

[0025] The antirust efficiency obtained by the experimental test is 81.58% in the electrochemical impedance spectrum and 90.36% in the dynamic potential polarization curve, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

Embodiment 2

[0027] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is 2-isolongifolene hydrazino-4-(2-oxo Substitute-2H-benzopyran-3-yl)thiazole, the medium is 3.5% sodium chloride solution, add (2-isolongifolene hydrazino-4-(2-oxo-2H-benzopyran The effective content of -3-yl)thiazole is 0.5mmol / L, the temperature is 25°C, and the pH=12.5.

[0028] The antirust efficiency obtained by the experimental test is 85.79% in electrochemical impedance spectrum and 90.54% in dynamic potential polarization curve, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

Embodiment 3

[0030] Conditions: The experimental material is carbon steel (Fe: 99.5%, Mn: 0.4-0.5%, C: 0.1-0.2%), and the effective rust inhibitor is 2-isolongifolene hydrazino-4-(2-oxo Substituent-2H-benzopyran-3-yl)thiazole, the medium is 3.5% sodium chloride solution, add 2-isolongifolenonehydrazino-4-(2-oxo-2H-benzopyran- The effective content of 3-yl)thiazole is 0.1mmol / L, the temperature is 25°C, and the pH=12.5.

[0031] The antirust efficiency obtained by the experimental test is 88.02% in electrochemical impedance spectrum and 91.74% in dynamic potential polarization curve, indicating that the compound is a rust inhibitor with low dosage and high efficiency.

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Abstract

The invention provides a steel rust inhibiting active ingredient and a rust inhibitor based on the steel rust inhibiting active ingredient, and the steel rust inhibiting active ingredient is 2-isolongifolenone hydrazino-4-(2-oxo-2H-benzopyran-3-yl) thiazole. The present invention also provides a preparation method of the active ingredient and application of the active ingredient in corrosion protection of carbon steel materials in seawater or a sodium chloride media. The active ingredient has the advantages of low toxicity, environmental protection, high efficiency, low dosage and strong continuous action ability, can effectively inhibit the corrosion damage of carbon steel, and has remarkable application value and broad market prospects.

Description

technical field [0001] The invention belongs to the field of steel antirust, relates to the preparation technology of steel antirust, in particular to a steel antirust and its preparation method and application. Background technique [0002] Based on the needs of ecological environment protection and sustainable development of marine resources, reinforced concrete rust inhibitors not only require low cost, stable and efficient anti-corrosion effect and safe and convenient management and use methods, but also adapt to the requirements of green chemistry in the application and development process. Requirements to reduce the environmental load of products. [0003] Traditional high-efficiency inorganic rust inhibitors for reinforced concrete, such as phosphates, chromates and nitrous acid-based products, are listed as highly toxic compounds in the PR ENV1504-9 announcement issued by the European Standardization Committee and have been banned in the basic It is used as a concre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D417/04C23F11/16
CPCC07D417/04C23F11/165
Inventor 曹琨郭世文张晓风严志轩张黎尹小丹
Owner NEIJIANG NORMAL UNIV
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