A kind of citric acid-based functional carbon point corrosion inhibitor and its preparation method and application
A technology of citric acid and functionalization, applied in the direction of organic chemistry, organic chemistry, etc., can solve the problem of unsatisfactory corrosion inhibition performance and achieve the effect of corrosion prevention
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Embodiment 1
[0038] A kind of preparation of citric acid-based functionalized carbon spot corrosion inhibitor, comprises the following steps:
[0039] (1) Dissolve 0.5mmol citric acid in deionized water, then heat to 200°C for hydrothermal reaction for 6h;
[0040] (2) Cool the product obtained in step (1) to room temperature, then add 5 mL of deionized water, 10 mL of absolute ethanol and 0.5 mL of triethylamine, stir well, add 0.5 g of 4-dimethylaminopyridine and stir to dissolve, Then add 1.8mmol melamine powder and stir to dissolve, then heat up to 90°C for hydrothermal reaction for 8h;
[0041] (3) The product obtained in step (2) is subjected to vacuum filtration, the semipermeable membrane is permeated for 24 hours, and the water is changed every 6 hours, then heated to 90°C for evaporation and concentration, and freeze-dried to obtain citric acid-based functionalized carbon Point corrosion inhibitor.
Embodiment 2
[0043] A kind of preparation of citric acid-based functionalized carbon spot corrosion inhibitor, comprises the following steps:
[0044] (1) Dissolve 3 mmol of citric acid in 10 mL of deionized water, then raise the temperature to 200°C for 8 hours;
[0045] (2) Cool the product obtained in step (1) to room temperature, then add 5 mL of deionized water, 10 mL of absolute ethanol and 0.9 mL of triethylamine, stir well, add 0.5 g of 4-dimethylaminopyridine and stir to dissolve , then add 10mmol melamine powder and stir to dissolve, then heat up to 85°C for hydrothermal reaction;
[0046](3) The product obtained in step (2) is filtered under reduced pressure, permeated with a semipermeable membrane for 24 hours, and the water is changed every 6 hours, then heated to 95°C for evaporation and concentration, and freeze-dried to obtain citric acid-based functionalized carbon Point corrosion inhibitor.
Embodiment 3
[0048] A kind of preparation of citric acid-based functionalized carbon spot corrosion inhibitor, comprises the following steps:
[0049] (1) Dissolve 10mmol of citric acid in 20mL of deionized water, then raise the temperature to 200°C for 10h;
[0050] (2) Cool the product obtained in step (1) to room temperature, then add 10mL of deionized water, 20mL of absolute ethanol and 1.5mL of triethylamine, stir well, add 1.5g of 4-dimethylaminopyridine and stir to dissolve , then add 10mmol melamine powder and stir to dissolve, then heat up to 95°C for hydrothermal reaction for 8h;
[0051] (3) The product obtained in step (2) is subjected to vacuum filtration, the semipermeable membrane is permeated for 24 hours, and the water is changed every 6 hours, then heated to 85°C for evaporation and concentration, and freeze-dried to obtain citric acid-based functionalized carbon Point corrosion inhibitor.
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