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Preparation method and application of rare earth doped silicon dioxide intelligent corrosion inhibition system

A silicon dioxide and rare earth doped technology, applied in the field of metal anticorrosion, can solve the problems of loss of inhibitory function and coating failure of corrosion inhibitors, and achieve the effect of increasing anticorrosion effect, low equipment requirements and low price

Active Publication Date: 2021-08-06
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the direct addition of corrosion inhibitors will lead to a series of consequences, such as the loss of inhibitory function of the corrosion inhibitor or the failure of the coating

Method used

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  • Preparation method and application of rare earth doped silicon dioxide intelligent corrosion inhibition system
  • Preparation method and application of rare earth doped silicon dioxide intelligent corrosion inhibition system
  • Preparation method and application of rare earth doped silicon dioxide intelligent corrosion inhibition system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a rare earth-doped silicon dioxide intelligent corrosion inhibition system, specifically comprising the following steps:

[0035] S1, using classic monodisperse SiO 2 Nanoparticles. 2.5mL of TEOS was placed in 46mL of ethanol solution and mixed thoroughly under a magnetic stirrer. Then 5 mL of ammonia water was added and stirred at room temperature for 4 h. The solution obtained was centrifuged at 8000rpm for 10min, the supernatant was removed, and the precipitate (SiO 2 ball) was washed with ethanol three times, and dried at 60°C for 30 min.

[0036] S2. Fully mix 0.4102g of anhydrous sodium acetate and 0.2528g of lanthanum acetate hydrate in 10mL of distilled water, and take the SiO prepared above 2 Nanospheres (50 mg) were dispersed in another 10 mL of water, then the suspension of SiO2 was placed in lanthanum acetate, dispersed sufficiently in ultrasound, transferred to a reaction kettle, and heated at 180 °C for 12 h. After cooling at ...

Embodiment 2

[0048] A method for preparing a rare earth-doped silicon dioxide intelligent corrosion inhibition system, specifically comprising the following steps:

[0049] S1, using classic monodisperse SiO 2 Nanoparticles. 2.5mL of TEOS was placed in 46mL of ethanol solution and mixed thoroughly under a magnetic stirrer. Then 5 mL of ammonia water was added and stirred at room temperature for 4 h. The solution obtained was centrifuged at 8000rpm for 10min, the supernatant was removed, and the precipitate (SiO 2 ball) was washed with ethanol three times, and dried at 60°C for 30 min.

[0050] S2. Fully mix 0.4102g of anhydrous sodium acetate and 0.0634g of cerium acetate hydrate in 10mL of distilled water, and take the SiO prepared above 2 Nanospheres (50 mg) were dispersed in another 10 mL of water, and then the SiO 2 The suspension was placed in lanthanum acetate, fully dispersed in ultrasound, transferred to a reaction kettle, and heated at 180°C for 12h. After cooling at room ...

Embodiment 3

[0054] Configure a NaCl solution with a mass fraction of 3.5wt.% to simulate the corrosion environment, and use a three-electrode system to monitor the corrosion process in real time. The working electrode is a self-made iron electrode, the reference electrode is a saturated calomel electrode, and the counter electrode is a platinum electrode. Add different concentrations (0.00g·L -1 , 0.02g·L -1 , 0.04g·L -1 , 0.06g·L -1 , 0.08g L -1 , 0.10g·L -1 ) according to the rare earth doped silica intelligent corrosion inhibition system material prepared according to the method in Example 1 and 2. During the electrochemical test, set the parameters, and perform the EIS test after the open circuit potential is stable, and apply a 10mV sinusoidal disturbance within the frequency range of 100kHz to 0.01Hz. The test result in embodiment 3 shows that when concentration is suitable (this experiment is 0.08g L -1 ), the rare earth doped silica intelligent corrosion inhibition system ha...

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Abstract

The invention discloses a preparation method and application of a rare earth doped silicon dioxide intelligent corrosion inhibition system, and relates to the technical field of metal corrosion prevention. The preparation method comprises the following steps of adding tetraethyl orthosilicate into an ethanol solution, fully mixing, adding stronger ammonia water into an obtained mixed solution for making a reaction, and carrying out centrifugal separation, washing and drying to obtain a product I; sufficiently mixing anhydrous sodium acetate and acetic acid rare earth hydrate in distilled water, adding the product I, dispersing the product I, heating in a reaction kettle, and carrying out centrifugal separation, washing and drying to obtain a product II; carrying out vacuum degassing on the product II, injecting a corrosion inhibitor / ethanol saturated solution, stirring, and carrying out centrifugal separation, washing and drying to obtain a product III; and finally, the product III is added into a Hris-Hcl buffer solution, adding dopamine hydrochloride for making a reaction, and carrying out centrifugal separation, washing and drying to obtain the product. According to the preparation method, rare earth elements and silicon dioxide are doped, the rare earth elements and the corrosion inhibitor have a synergistic effect on corrosion prevention, and the corrosion prevention effect can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of metal anticorrosion, in particular to a preparation method and application of a rare earth-doped silicon dioxide intelligent corrosion inhibition system. Background technique [0002] Metal corrosion has always been an urgent problem to be solved. At present, the most widely used and effective means of metal corrosion protection is the synergistic effect of corrosion inhibitors and protective layers. Traditional anti-corrosion methods usually add corrosion inhibitors directly to the corrosive medium or coating to achieve the effect of metal anti-corrosion. However, the direct addition of corrosion inhibitors will lead to a series of consequences, such as the loss of inhibitory function of the corrosion inhibitor or the failure of the coating. Therefore, a technology based on loading corrosion inhibitors in nanocontainers and self-releasing them under appropriate external stimuli is regarded as a promisin...

Claims

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Application Information

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IPC IPC(8): C23F11/08
CPCC23F11/08
Inventor 胡松青张悦李春玲孙霜青王秀民王志坤吕强
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)