CN114481136A - A kind of gas phase corrosion inhibitor based on metal organic framework material and preparation method thereof - Google Patents

Abstract

The invention provides a vapor phase corrosion inhibitor based on a metal organic framework material, which relates to the technical field of vapor phase corrosion inhibitors and comprises the following components, 5-50 mg of the metal organic framework material; 10-120 mmol/ml of triamterene acetonitrile solution. According to the invention, the metal organic frame and the triamterene are organically combined, so that the triamterene can be completely stored in the hole of the metal organic frame, self-starting release is realized according to the change of the environment, and a protective film is formed.

Description

A kind of gas phase corrosion inhibitor based on metal organic framework material and preparation method thereof

technical field

The present invention relates to the technical field of gas phase corrosion inhibitors, in particular, to a gas phase corrosion inhibitor based on metal organic framework materials and a preparation method thereof.

Background technique

Nowadays, a common problem faced by metal products in the process of manufacturing, use and transportation is corrosion. Corrosion has also become a stumbling block for the current industrial development. It can not only cause huge economic losses, but also pollute the environment and even cause catastrophic damage. ACCIDENT.

In view of the corrosion problem, selecting and using a suitable corrosion inhibitor can effectively inhibit the corrosion problem of metals and their products. Because the corrosion inhibitor technology has good effects and huge economic benefits in practical applications, this technology has gradually become one. an important anti-corrosion technology.

For metals in liquid medium with anti-corrosion properties, water-soluble corrosion inhibitors are usually selected. For metals exposed to the atmosphere, small molecular compounds that can volatilize automatically are usually selected as gas-phase corrosion inhibitors. Small molecule gas phase corrosion inhibitors can protect the internal grooves, surfaces and even crevices of metal products, so gas phase corrosion inhibitors have become an effective method to improve the corrosion resistance of metals.

People's research on gas phase corrosion inhibitors can be roughly divided into three categories, one is ferrous metal gas phase corrosion inhibitors, such as dicyclohexylamine nitrite and cyclohexylamine carbonate, which have good effects on iron, nickel, zinc and other black metals. Anti-rust ability, but no corrosion inhibition ability for non-ferrous metals. One is the gas phase corrosion inhibitor which is obtained by compounding various metals with gas phase corrosion inhibitors, such as benzotriazole and various compounds with different vapor pressures. Although compounds such as benzotriazole, dicyclohexylamine nitrite and cyclohexylamine carbonate have been shown to have good corrosion inhibition properties, they have a common feature of being highly toxic, so non-toxic, low-toxic corrosion inhibitors It has been developed rapidly, mainly including inorganic acid salts and organic acid salts of amines and rust-proof paper and rust-proof films loaded with gas-phase corrosion inhibitors.

At present, there are many reports on the use of gas-phase corrosion inhibitors, but the use conditions of gas-phase corrosion inhibitors are not clear, and they can still volatilize in a low-corrosion environment, causing a certain amount of waste.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a gas-phase corrosion inhibitor based on metal organic framework materials, so as to provide another gas-phase corrosion inhibitor, the gas-phase corrosion inhibitor can release the corrosion inhibitor according to the humidity, so as to form a protective film for protection, to achieve the purpose of effective and controllable release of corrosion inhibitor, and reduce unnecessary waste.

The invention is realized by the following technical solutions: 5-50 mg of metal organic framework material; 10-120 mmol/ml of triamterene acetonitrile solution. Wherein the triamterene acetonitrile solution is to dissolve triamterene in the acetonitrile solution, and acetonitrile is used as a solvent.

In order to better realize the present invention, further, the metal-organic framework material is selected from the metal-organic framework material MOF-5.

The invention also provides a method for preparing a gas phase corrosion inhibitor based on a metal organic framework material. The metal organic framework material is mixed with a triamterene acetonitrile solution, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

In order to better realize the present invention, further, the reaction conditions are: stirring at 25-100° C. and 1000 r/min for 1-7 days, then centrifuging at 6000 rpm for 10-45 minutes, washing with acetonitrile solution for 1-5 times, Vacuum dry at 60-100°C for 6 hours.

In order to better realize the present invention, further, the reaction conditions are: stirring at 80° C., 1000 r/min for 6 days, then centrifuging at 6000 rpm for 30 minutes, washing with acetonitrile solution 3 times, and vacuum drying at 80° C. for 6 hours.

A gas-phase corrosion inhibitor based on metal organic framework material is prepared by the above preparation method.

The present invention also provides the application of the vapor-phase corrosion inhibitor based on the metal organic framework material in the direction of metal anticorrosion.

The invention provides a gas phase corrosion inhibitor based on metal organic framework material, the gas phase corrosion inhibitor is prepared by mixing organic metal framework and triamterene acetonitrile solution, the metal organic framework is selected from metal organic framework MOF-5 , its structure is a porous tube, after mixing with triamterene, after stirring and centrifugation, triamterene can enter the pores of metal organic framework MOF-5, and then washed and dried, and then triamterene The pyridines are preserved in the pores of the metal-organic framework MOF-5. During use, if the environment is relatively dry, the metal-organic framework MOF-5 will not decompose, and the presence of triamterene in the metal-organic framework MOF-5 will not contact the metal, nor will it adsorb on the metal surface. It forms a protective film and will not cause waste. When the humidity of the use environment is high, the metal-organic framework MOF-5 will be decomposed, and after the decomposition, triamterene in the metal-organic framework MOF-5 will be released. Adsorbed on the metal surface to form a protective film to achieve the purpose of protection.

The beneficial effects of the present invention are:

In the present invention, by organically combining the metal-organic framework and triamterene, triamterene can be completely stored in the holes of the metal-organic framework, and self-starting release is realized according to the change of the environment to form a protective film. When dry, the metal organic framework will not decompose, so that triamterene will not be released, reducing the possibility of release, thereby increasing the service life of the corrosion inhibitor and reducing unnecessary waste. When the humidity of the environment is high, The metal organic framework is decomposed, and the triamterene in the metal organic framework is also released to form a protective film, thereby achieving the purpose of protection. The corrosion inhibitor can realize adaptive adjustment according to environmental changes, thereby improving corrosion inhibition. agent utilization.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings required in the present invention. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be viewed as As a limitation of the scope, for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the photo based on metal organic framework material vapor phase corrosion inhibitor provided by the present invention;

Fig. 2 is the AC impedance spectrogram of the load gas phase corrosion inhibitor provided by the present invention;

Fig. 3 is the polarization curve diagram of test carbon steel provided by the present invention;

4 is a graph showing the change of the charge transfer resistance of the vapor-phase corrosion inhibitor of the present invention with humidity.

Detailed ways

The technical solutions in the present invention will be described below with reference to the accompanying drawings in the present invention.

Example 1:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10 mg; triamterene acetonitrile solution 10 mmol, 1 ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions were: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 10 minutes, washing with acetonitrile solution once, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 2:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 50mmol, 1ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions are: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 45 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 3:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 100mmol, 1ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions were: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 15 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 4:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 50mmol, 1ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions are: stirring at 50°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 25 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 5:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 150mmol, 1ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions were: stirring at 30°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 35 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 6:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10 mg; triamterene acetonitrile solution 50 mmol/ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions were: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 20 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 7:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 50mmol, 1ml.

The metal-organic framework material is MOF-5, a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions were: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 30 minutes, washing twice with acetonitrile solution, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Example 8:

A vapor-phase corrosion inhibitor based on a metal-organic framework material, comprising the following components;

Metal organic framework material 10mg; Triamterene acetonitrile solution 50mmol, 1ml.

The metal-organic framework material is MOF-5, which is a metal-organic framework material.

A preparation method of a vapor-phase corrosion inhibitor based on a metal-organic framework material,

The metal organic framework material and the triamterene acetonitrile solution are mixed, and the gas phase corrosion inhibitor is obtained through stirring, centrifugation, washing and vacuum drying.

The reaction conditions are: stirring at 80°C and 1000 r/min for 1 day, then centrifuging at 6000 rpm for 40 minutes, washing with acetonitrile solution three times, and vacuum drying at 80°C for 6 hours.

In parts by weight, 1 part of the prepared humidity-controlled release gas phase corrosion inhibitor was wrapped in a non-woven bag, and its anti-corrosion performance was tested in an airtight container with a humidity of 50%.

Experimental results

As shown in Figure 2, Figure 2 is the AC impedance spectrum of the loaded gas phase corrosion inhibitor. It can be seen from the figure that the capacitive arc radius of the MOF-5 loaded with triamterene is significantly larger than that of the one without triamteridine. Metal-organic framework MOF-5, indicating that with the increase of humidity, metal-organic framework MOF-5 is decomposed, triamterene is slowly volatilized, adsorbed on the metal surface, and the corrosion resistance of the metal is improved.

As shown in Figure 3, Figure 3 is a polarization curve diagram. It can be seen from the figure that after adding triamterene, the corrosion current density is reduced by 2 orders of magnitude, indicating that triamterene has certain anti-corrosion properties.

As shown in Figure 4, it can be seen from the figure that with the increase of humidity, part of triamterene is released, and the charge transfer resistance increases, indicating that it can play a certain role in inhibiting corrosion on the metal surface.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (7)

1. a vapor-phase corrosion inhibitor based on metal organic framework material, is characterized in that, comprises the following components: Metal organic framework material 5～50mg; Triamterene acetonitrile solution 10～120mmol/ml. 2 . The metal-organic framework material-based gas phase corrosion inhibitor according to claim 1 , wherein the metal-organic framework material is selected from the metal-organic framework material MOF-5. 3 . 3. the preparation method of the vapor-phase corrosion inhibitor based on metal organic framework material according to claim 2, is characterized in that, metal organic framework material and triamterene acetonitrile solution are mixed, through stirring, centrifugation, washing, vacuum drying , to obtain a vapor-phase corrosion inhibitor. 4. preparation method according to claim 3 is characterized in that, reaction conditions are: stirring at 25～100 ℃, 1000r/min for 1～7 days, then rotating speed is 6000 rev centrifugation 10～45 minutes, wash with acetonitrile solution 1 to 5 times, vacuum drying at 60 to 100°C for 6 hours. 5. preparation method according to claim 4 is characterized in that, reaction conditions are: stirring at 80 ℃, 1000r/min for 6 days, then rotating speed is 6000 rev centrifugation for 30 minutes, wash 3 times with acetonitrile solution, 80 ℃ vacuum Dry for 6 hours. 6 . A gas-phase corrosion inhibitor based on a metal organic framework material, characterized in that, it is prepared by the preparation method described in any one of claims 3 to 5 . 7. The application of the metal-organic framework material-based vapor-phase corrosion inhibitor according to claim 6 in the direction of metal anticorrosion.

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