Controlled-release magnetic ZnAlCe hydrotalcite loaded 2-mercaptobenzothiazole corrosion inhibitor and preparation method thereof

A technology of mercaptobenzothiazole and hydrotalcite, which is applied in the field of corrosion inhibitors for seawater circulating cooling systems, can solve problems such as corrosion of metal equipment and environmental pollution by corrosion inhibitors, and achieve targeted positioning, rapid recovery performance, long-term The effect of good corrosion inhibition performance

Inactive Publication Date: 2020-09-01
TIANJIN UNIV
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  • Application Information

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Problems solved by technology

[0005] The invention overcomes the deficiencies in the prior art, and provides a controllable-release magnetic zinc-aluminum-cerium hydrotalcite loaded 2-mercaptobenzo Thiazole corrosion inhibitor and preparation method thereof, utilizing the nano-container effect of hydrotalcite and Fe 3 o 4 2-mercaptobenzothiazole-intercalated magnetic zinc-aluminum-cerium hydrotalcite corrosion inhibitor material was synthesized by ion exchange method; at the same time, the release behavior of the corrosion inhibitor was controlled by an external magnetic field, in order to pass the corrosion inhibitor The magnetic control release behavior improves the corrosion resistance and service life of carbon steel in seawater circulating cooling system

Method used

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  • Controlled-release magnetic ZnAlCe hydrotalcite loaded 2-mercaptobenzothiazole corrosion inhibitor and preparation method thereof
  • Controlled-release magnetic ZnAlCe hydrotalcite loaded 2-mercaptobenzothiazole corrosion inhibitor and preparation method thereof
  • Controlled-release magnetic ZnAlCe hydrotalcite loaded 2-mercaptobenzothiazole corrosion inhibitor and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Weigh 2.7g FeCl 3 ·6H 2 O, 7.2 g CH 3 COONa·3H 2 O, dissolved in 60ml of ethylene glycol, stirred to form a uniform yellow solution, then transferred to an autoclave, and the autoclave was placed in a dry oven at 160°C for 18 hours. The obtained product was separated with a RuFeB permanent magnet, washed repeatedly with deionized water and ethanol, dried in a drying oven at 60°C for 24 hours, and ground to obtain Fe 3 o 4 .

[0044] (2) Weigh 0.174g Fe 3 o 4 Disperse in 100ml of methanol and sonicate for 15min to obtain a uniform suspension. The suspension was transferred to a four-neck flask, stirred at room temperature, and N was continuously fed during the stirring process. 2 .

[0045] (3) Press n(Zn 2+ ) / n(Fe 3 o 4 )=2.0 ratio to weigh Zn(NO 3 ) 2 ·6H 2 O, press n(Zn 2+ ) / n(Al 3+ )=4:1 ratio, n(Al 3+ ) / n(Ce 3+ )=5:1 ratio to weigh Al(NO 3 ) 3 9H 2 O and Ce(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O and Ce(NO 3 ) 3 ...

Embodiment 2

[0055] (1) Weigh 2.7g FeCl 3 ·6H 2 O, 7.2 g CH 3 COONa·3H 2 O, dissolved in 60ml of ethylene glycol, stirred to form a uniform yellow solution, then transferred to an autoclave, and the autoclave was placed in a dry oven at 200°C for 16 hours. The obtained product was separated with a RuFeB permanent magnet, washed repeatedly with deionized water and ethanol, dried in a drying oven at 60°C for 24 hours, and ground to obtain Fe 3 o 4 .

[0056] (2) Weigh 0.174g Fe 3 o 4 Disperse in 100ml of methanol and sonicate for 15min to obtain a uniform suspension. The suspension was transferred to a four-neck flask, stirred at room temperature, and N was continuously fed during the stirring process. 2 .

[0057] (3) Press n(Zn 2+ ) / n(Fe 3 o 4 )=10.0 ratio to weigh Zn(NO 3 ) 2 ·6H 2 O, press n(Zn 2+ ) / n(Al 3+ )=2:1, the ratio of n(Al 3+ ) / n(Ce 3+ )=6:1 ratio to weigh Al(NO 3 ) 3 9H 2 O and Ce(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O and Ce(NO ...

Embodiment 3

[0063] (1) Weigh 2.7g FeCl 3 ·6H 2 O, 7.2 g CH 3 COONa·3H 2 O, dissolved in 60ml of ethylene glycol, stirred to form a homogeneous yellow solution, then transferred to an autoclave, and the autoclave was placed in a 180°C drying oven to react for 14h. The obtained product was separated with a RuFeB permanent magnet, washed repeatedly with deionized water and ethanol, dried in a drying oven at 60°C for 24 hours, and ground to obtain Fe 3 o 4 .

[0064] (2) Weigh 0.174g Fe 3 o 4 Disperse in 100ml of methanol and sonicate for 15min to obtain a uniform suspension. The suspension was transferred to a four-neck flask, stirred at room temperature, and N was continuously fed during the stirring process. 2 .

[0065] (3) Press n(Zn 2+) / n(Fe 3 o 4 )=5.0 ratio to weigh Zn(NO 3 ) 2 ·6H 2 O, press n(Zn 2+ ) / n(Al 3+ )=5:1 ratio, n(Al 3+ ) / n(Ce 3+ )=7:1 ratio to weigh Al(NO 3 ) 3 9H 2 O and Ce(NO 3 ) 3 9H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Al(NO 3 ) 3 9H 2 O and Ce(NO ...

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Abstract

The invention provides a controlled-release magnetic ZnAlCe hydrotalcite loaded 2-mercaptobenzothiazole corrosion inhibitor and a preparation method thereof. With FeCl3.6H2O, crystalline sodium acetate, ethylene glycol, Zn(NO3)2.6H2O, Al(NO3)3.9H2O, Ce(NO3)3.9H2O, 2-mercaptobenzothiazole, NaOH and methyl alcohol as raw materials, an MBT-intercalated magnetic ZnAlCe hydrotalcite (Fe3O4@ZnAlCe-MBT LDH) corrosion inhibitor material is prepared through an ion exchange method. Through the nanocontainer effect of hydrotalcite and superparamagnetism of Fe3O4, by means of the ion exchange method, a 2-mercaptobenzothiazole-intercalated magnetic ZnAlCe hydrotalcite corrosion inhibitor material is synthesized; and meanwhile, by means of an applied magnetic field, the release behavior of the corrosioninhibitor is controlled, thereby improving the corrosion resistance of carbon steel and prolonging the service life of the carbon steel in a seawater cycle cooling system through the magnetic-controlled release behavior of the corrosion inhibitor.

Description

technical field [0001] The invention relates to the technical field of corrosion inhibitors for seawater circulating cooling systems, in particular to a controlled-release magnetic zinc-aluminum-cerium hydrotalcite-loaded 2-mercaptobenzothiazole corrosion inhibitor and a preparation method thereof. Background technique [0002] Seawater circulating cooling technology is an important technology that uses seawater directly to replace fresh water as a cooling medium, thereby saving fresh water resources and utilizing seawater resources reasonably and efficiently (Jin Yapeng, Cui Zhendong, Gao Lili, Hou Xiangyu, Wang Weizhen, Yin Jianhua, Corrosion Electrochemical Technology Application in Seawater Circulating Cooling System, Ocean Development and Management, 2018,35(4):98-105). However, in the seawater circulating cooling system, the corrosion of metal equipment often brings serious economic and safety problems. Therefore, it is very important to solve the corrosion of metal e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F11/14C23F11/18
CPCC23F11/149C23F11/18
Inventor 王吉会刘新胡文彬
Owner TIANJIN UNIV
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