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A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application

A metal-organic framework and corrosion-inhibitor technology, which is applied in the field of metal-organic framework-encapsulated corrosion-inhibitor composites and the field of preparation thereof, can solve the problems of lack of water stability and acid-sensitive dissociation, and achieve high yield and high Anti-corrosion efficiency and the effect of less dosage

Active Publication Date: 2021-05-04
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zeolite imidazole framework (ZIF) is a branch of the huge MOF family, which not only inherits the structural characteristics of MOF itself, but also has water stability and acid-sensitive dissociation properties that other MOF types do not have; currently , ZIF is mainly used in the fields of gas storage, gas separation, chemical sensors, catalysis and drug delivery, and there is no related report on the preparation of targeted corrosion inhibitors for marine corrosion protection.

Method used

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  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application
  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application
  • A compound of metal-organic framework encapsulating corrosion inhibitor and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0048] The first step: preparation of copper ion-modified 2-mercapto-1,3,4-thiadiazole precursor:

[0049] Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. At room temperature, 69 mg (0.41 mmol) of 2-mercapto-1,3,4-thiadiazole and 50 mg (0.21 mmol) of copper nitrate trihydrate (2-mercapto-1,3,4-thiadiazole and copper nitrate The molar ratio of trihydrate (about 2:1) was added to the buffer solution together, and stirred at room temperature for 30 minutes to obtain a copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 83%.

[0050] The above 2-mercapto-1,3,4-thiadiazole and copper nitrate trihydrate are in the molar ratio of 2 to 4:1, copper ion and 2-mercapto-1,3,4-thiadiazole a...

Embodiment 2

[0057] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0058] The first step: preparation of copper ion-modified 2-mercapto-1,3,4-thiadiazole precursor:

[0059] Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. Mix 104 mg (0.62 mmol) 2-mercapto-1,3,4-thiadiazole with 50 mg (0.21 mmol) copper nitrate trihydrate (2-mercapto-1,3,4-thiadiazole and copper nitrate The molar ratio of trihydrate is about 3:1) was added to the above buffer solution, and stirred at room temperature for 30 minutes to obtain the copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 88%.

[0060] The above 2-mercapto-1,3,4-thiadiazole and copper nitrate trihydrate are in the molar ratio of 2 to 4:1, copper ion and 2-mercapto-1,3,4-thiadiazole active group Both of...

Embodiment 3

[0067] Preparation of ZIF-67 Encapsulated Copper Ion Modified Thiazole Corrosion Inhibitor Complex

[0068] The first step: preparation of copper ion-modified 2-mercapto-1,3,4-thiadiazole precursor:

[0069]Firstly, 3.95g of Tris base was dissolved in 13mL of deionized water, then the volume was adjusted to 25mL with deionized water, and then the pH was adjusted to 8.8 with ammonium chloride to obtain a buffer solution. Mix 138mg (0.83mol) 2-mercapto-1,3,4-thiadiazole with 50mg (0.21mol) copper nitrate trihydrate (2-mercapto-1,3,4-thiadiazole and copper nitrate The trihydrate molar ratio is about 4:1) was added to the above buffer solution together, and stirred at room temperature for 30 minutes to obtain a copper ion-modified thiazole-containing corrosion inhibitor precursor with a yield of 85%.

[0070] The above 2-mercapto-1,3,4-thiadiazole and copper nitrate trihydrate are in the molar ratio of 2 to 4:1, copper ion and 2-mercapto-1,3,4-thiadiazole active group Both of th...

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Abstract

The invention discloses a metal-organic framework encapsulating a corrosion inhibitor compound and a preparation method and application thereof. The compound is composed of a ZIF metal-organic framework material and a corrosion inhibitor encapsulated therein. The composite material system is applied in the splash area of ​​seawater waves. Due to the local acidic environment in the early stage of the alternating dry-wet cycle corrosion of carbon steel or metal products, the metal-organic framework is defective and the corrosion inhibitor is released, which can realize the targeting of the corrosion-induced area. protection. Further encapsulation of copper ion-modified thiazole corrosion inhibitors in metal-organic frameworks can obtain higher reprinting capacity. To inhibit the microbial corrosion caused by the growth of various aerobic bacteria on the surface of the substrate. Adopting the corrosion inhibition system of the present invention has strong targeting, high efficiency and durability, high cost performance, and has remarkable application value and broad market prospect.

Description

technical field [0001] The invention relates to the technical field of marine iron and steel anti-corrosion materials, and more specifically, to a metal-organic framework-encapsulated corrosion inhibitor compound and its preparation method and application. Background technique [0002] The marine environment can be divided into five corrosion zones, namely sea mud zone, full immersion zone, tidal zone, spray splash zone and atmospheric zone. Among them, the spray splash area is constantly soaked and dried alternately due to the influence of wind, waves, tides and other factors, so this area is very easy to form a rust layer on the surface of carbon steel and other substrates, and the closed battery composed of carbon steel and rust layer will pass through the electron The transfer generates hydrogen ions, causing a local acidic environment within the rust layer. In addition, metal products such as carbon steel will form a layer of water film with extremely high oxygen conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/04
CPCC23F11/04
Inventor 田惠文李伟华侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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