Asphalt-based carbon dot corrosion inhibitor as well as preparation method and application thereof
A corrosion inhibitor, bitumen-based technology, applied in the field of metal anti-corrosion, can solve problems such as harsh reaction conditions, toxic reagents, and environmental pollution, and achieve the effects of good water solubility, obvious effects, and wide sources
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Embodiment 1
[0029] The preparation method of the pitch-based carbon point corrosion inhibitor of this embodiment is as follows: dissolving 0.5g coal tar pitch and 0.1g cetyltrimethylammonium bromide in 150mL deionized water, ultrasonicating for 30min; hydrothermally heating at 180°C The reaction was carried out for 10 h, cooled to room temperature after the reaction, filtered, and the filtered filtrate was dried at 90° C. for 10 h to obtain a pitch-based carbon dot corrosion inhibitor.
[0030] The transmission electron microscope image of the prepared pitch-based carbon dot corrosion inhibitor is as follows figure 1 shown, by figure 1 It can be seen that the particle size distribution of the carbon dots of the prepared pitch-based carbon dot corrosion inhibitor is relatively uniform, and the size is about 3-5 nm. The X-ray photoelectron spectroscopy (XPS) diagram of the prepared pitch-based carbon dot corrosion inhibitor is as follows figure 2 shown, figure 2 a shows that the prepar...
Embodiment 2
[0041] In 1M HCl solution, the pitch-based carbon dot corrosion inhibitor in Example 1 was configured into corrosion inhibitor solutions of different concentrations (10mg / L, 20mg / L, 50mg / L, 100mg / L), using the method to test the corrosion inhibition performance;
[0042] The AC impedance spectrum is as Figure 4 shown. Depend on Figure 4 It can be seen that the radius of the resistance arc after adding the carbon dot corrosion inhibitor is significantly larger than that without the carbon dot corrosion inhibitor, and with the increase of the carbon dot corrosion inhibition and concentration, the radius of the resistance arc gradually increases, indicating that the corrosion resistance of the carbon dots increases. The corrosion performance was gradually improved, indicating that the addition of carbon pit corrosion inhibitor can significantly reduce the corrosion of carbon steel by hydrochloric acid.
[0043] The polarization curve is shown as Figure 5 shown. Depend on ...
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