Gas-phase corrosion inhibitor for protection during maintenance of chemical equipment and preparation method of gas-phase corrosion inhibitor
A gas-phase corrosion inhibitor and chemical equipment technology, applied in the field of corrosion and protection, can solve the problems of not being environmentally friendly and not being able to be used as a general-purpose corrosion inhibitor
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[0030] Preparation of pine milk mushroom extract: crush pine milk mushroom and place it in an oven at 160°C for 1.5 hours to dry, then grind it with a ball mill for 30 minutes, and sieve to obtain pine milk mushroom powder with a particle size of 80-120 μm; take 30 g of the powder and mix with 200ml of ethanol was mixed, and placed in a 60°C water bath for heating and ultrasonic extraction for 60min; the residue was filtered to obtain a clear and transparent extract. Ultraviolet spectroscopic detection shows that the content of amino acid in the extract is 80ug / ml, the content of niacin is 4.4ug / ml, and the absorption peak of superoxide dismutase at 282nm in 5g of the extract is 1.69.
[0031] Preparation of milky mushroom extract: grind milky mushroom and place it in an oven at 110°C for 2.5 hours to dry, then grind it with a ball mill for 30 minutes, and sieve to obtain milky mushroom powder with a particle size of 80-120 μm; take Mix 10g of powder with 100ml of ethanol, hea...
Embodiment 1-6
[0040] According to the raw materials and the addition amount in Table 1, and mix and prepare respectively the vapor phase corrosion inhibitor in the embodiment 1-6 by the following method:
[0041] Mix the mushroom extract, phytate, urea and ethanol, place the mixture in a water bath at 60°C for 15 minutes and ultrasonically dissolve it, and filter the residue to obtain a clear and transparent solution, which is the vapor phase corrosion inhibitor.
[0042] Table 1
[0043]
[0044] The vapor phase corrosion inhibitors prepared in Examples 1-6 were respectively subjected to the following metal corrosion inhibition performance tests, and the test results are shown in Table 2:
[0045] (1) Carbon steel corrosion rate test
[0046] Prepare a glass container with a volume of 1L, which is filled with 300ml of 0.5% NaCl solution, and hang the 20# carbon steel coupon to the gas phase. The gas-phase corrosion inhibitor was subjected to ultrasonic atomization (atomization of 1 mg...
Embodiment 1
[0056] The experimental result of carbon steel self-corrosion potential test in embodiment 1 is as follows figure 2 shown. Among them, the vertical axis represents the polarization potential, and the horizontal axis represents the common logarithm of the polarization current density. It can be clearly seen that the self-corrosion potential of the experimental group advocating gas-phase corrosion inhibitors has shifted positively compared with the control group, and the corrosion current density has decreased significantly, indicating that the corrosion inhibitor can be dissolved in the liquid phase, and has no effect on 20# Carbon steel plays a good role in corrosion inhibition.
[0057] In the above-mentioned embodiment 1, the 316L stainless steel sheets embedded in the catalyst particles of the experimental group and the control group during the stainless steel pitting test were put together for photographing, as image 3 As shown, it can be seen that figure 1 The steel ...
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