Preparation method and application of a rare earth-doped silica intelligent corrosion inhibition system
A silicon dioxide and rare earth doping technology, which is applied in the field of metal anticorrosion, can solve the problems of corrosion inhibitors losing their inhibitory function and coating failure, and achieve the effect of increasing anticorrosion effect, low equipment requirements and strengthening corrosion inhibition effect
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Embodiment 1
[0034] Preparation method of rare earth doped silica intelligent corrosion inhibition system, including the following steps:
[0035] S1, the use of classic Preparation of monodisperse SiO 2 Nanoparticles. 2.5 mL of TEOS is placed in a 46 mL ethanol solution and mixed thoroughly under a magnetic stirrer. After that, add 5 mL of ammonia and stir at room temperature for 4 h. Centrifuge the resulting solution at 8000 rpm for 10 min, remove the supernatant, and precipitate (SiO.). 2 Bulbs) are washed 3 times with ethanol and dried at 60 °C for 30 min.
[0036] S2, 0.4102g of anhydrous sodium acetate and 0.2528g lanthanum acetate hydrate fully mixed in 10mL of distilled water, take the SiO prepared above 2 The nanospheres (50 mg) are dispersed in an additional 10 mL of water, and then the suspension of SiO2 is placed in lanthanum acetate, fully dispersed in sonication, transferred to a reactor, and heated at 180 °C for 12 h. After cooling at room temperature for 3h, centrifuge at 8000...
Embodiment 2
[0048] Preparation method of rare earth doped silica intelligent corrosion inhibition system, including the following steps:
[0049] S1, the use of classic Preparation of monodisperse SiO 2 Nanoparticles. 2.5 mL of TEOS is placed in a 46 mL ethanol solution and mixed thoroughly under a magnetic stirrer. After that, add 5 mL of ammonia and stir at room temperature for 4 h. Centrifuge the resulting solution at 8000 rpm for 10 min, remove the supernatant, and precipitate (SiO.). 2 Bulbs) are washed 3 times with ethanol and dried at 60 °C for 30 min.
[0050] S2, 0.4102g of anhydrous sodium acetate and 0.0634g of cerium acetate hydrate fully mixed in 10mL of distilled water, take the SiO prepared above 2 The nanospheres (50 mg) are dispersed in an additional 10 mL of water and then SiO 2 The suspension is placed in lanthanum acetate, fully dispersed in sonication, transferred to the reactor and heated at 180 °C for 12 h. After cooling at room temperature for 3h, centrifuge at 8000 r...
Embodiment 3
[0054]The configuration mass fraction of 3.5wt.% NaCl solution simulates the corrosion environment, and the corrosion process is monitored in real time by using a three-electrode system, the working electrode is a homemade iron electrode, the reference electrode is a saturated calomel electrode, the counter electrode is a platinum electrode, and 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 methods in Examples 1, 2 prepared rare earth doped silica intelligent corrosion inhibition system material. During the electrochemical test, set the parameters, and perform the EIS test after the open circuit potential is stabilized, and the frequency range is within 100kHz to 0.01Hz, and a 10mV sinusoidal disturbance is applied. The test results in Example 3 show that when the concentration is appropriate (this experiment is 0.08g · L -1 When the rare earth doped silica intelligent corrosion inhibition system has a good...
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