Carbon steel corrosion inhibitor used in oxygen-containing brine and preparation method thereof
A corrosion inhibitor and carbon steel technology, applied in the field of corrosion and protection, can solve the problems of high cost, unfriendly environment, large dosage, etc., and achieve the effect of low cost, simple preparation method and excellent corrosion inhibition effect
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Embodiment 1
[0033] The discarded shrimp shells were dried in an oven at 120° C. for 15 minutes, and then ground in a ball mill for 10 minutes to obtain a powder with a particle size of about 80 μm. Add a certain amount of deionized water to the shrimp shell powder, stir thoroughly for 10 minutes, then add sodium sulfite, sodium metasilicate pentahydrate and glyceryl palmitate in sequence, and stir well to obtain a uniform corrosion inhibitor solution. The mass fraction of shrimp shell powder is 2%, the mass fraction of sodium sulfite is 25%, the mass fraction of sodium metasilicate pentahydrate is 15%, the mass fraction of glyceryl palmitate is 5%, and the mass fraction of deionized water is 53%.
[0034] The corrosion inhibitor prepared in Example 1 was added to the non-deoxygenated 2% NaCl solution, and the addition amount of the corrosion inhibitor was 150 ppm. The corrosion behavior of Q345R carbon steel was studied using the rotary coupon tester described in GBT18175-2014. At the sa...
Embodiment 2
[0037] The discarded shrimp shells were dried in an oven at 130° C. for 15 minutes, and then ground in a ball mill for 15 minutes to obtain a powder with a particle size of about 60 μm. Add a certain amount of deionized water to the shrimp shell powder, stir well for 10 minutes, then add potassium sulfite, potassium metasilicate pentahydrate and glyceryl pearlescent fatty acid in sequence, and get a uniform corrosion inhibitor solution after stirring well. Wherein the mass fraction of shrimp shell powder is 6%, the mass fraction of potassium sulfite is 30%, the mass fraction of potassium metasilicate pentahydrate is 10%, the mass fraction of pearlescent fatty acid glyceride is 10%, and the mass fraction of deionized water is 44%. .
[0038]The corrosion inhibitor prepared in Example 2 was added to the non-deoxygenated 2% NaCl solution, and the addition amount of the corrosion inhibitor was 130 ppm. The corrosion behavior of Q345R carbon steel was studied using the rotary coup...
Embodiment 3
[0040] The discarded shrimp shells were dried in an oven at 150° C. for 15 minutes, and then ground in a ball mill for 20 minutes to obtain a powder with a particle size of about 30 μm. Add a certain amount of deionized water to the shrimp shell powder, stir thoroughly for 10 minutes, then add sodium sulfite, potassium metasilicate pentahydrate and glyceryl stearate in turn, and stir well to obtain a uniform corrosion inhibitor solution. The mass fraction of shrimp shell powder is 9%, the mass fraction of sodium sulfite is 12%, the mass fraction of potassium metasilicate pentahydrate is 25%, the mass fraction of glyceryl stearate is 15%, and the mass fraction of deionized water is 39%.
[0041] The corrosion inhibitor prepared in Example 3 was added to the non-deoxygenated 2% NaCl solution, and the addition amount of the corrosion inhibitor was 110 ppm. The corrosion behavior of Q345R carbon steel was studied using the rotary coupon tester described in GBT18175-2014. At the s...
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