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YSH-05 High Temperature Acidizing Corrosion Inhibitor
[Preparation method] YSH-05 high temperature acidification corrosion inhibitor is prepared by using corrosion inhibitor MNX as a matrix and compounded with four synergists
(1) Synthesis of matrix corrosion inhibitor MNX
YSH-05 parent corrosion inhibitor MNX is a β-amino ketone formed by the condensation of ketones, aldehydes and amines containing active hydrogen.
The general reaction formula of YSH-05 parent corrosion inhibitor MNX:
Note: In the formula, R 1 , R 2 and R 3 are alkyl or aryl groups
(2) Preparation of high temperature acidification corrosion inhibitor YSH-05
When only the parent corrosion inhibitor MNX is added to the acid solution, the experimentally measured corrosion rate is 33.
[Application] The static weight loss method is used to study the corrosion inhibition performance of YSH-05 high temperature acidification corrosion inhibitor at different temperatures, different dosages, and different acid types and acid concentrations.
Table 6-22 The influence of different hydrochloric acid concentrations on the corrosion rate
The acidizing corrosion inhibitor YSH-05 not only has a good corrosion inhibition effect in hydrochloric acid, but also shows excellent performance in hydrofluoric acid and earth acid, as listed in Table 6-23
Table 6-23 Comparison of the effect of acidizing corrosion inhibitor YSH-05 in different acid solutions
It can be seen from Table 6-23 that in 15% hydrochloric acid, hydrofluoric acid and earth acid, the corrosion rates at 90℃ are 2.