PREPARATION OF CORROSION INHIBITOR YSH-05 FOR HIGH-TEMPERATURE ACIDIFICATION

Inhibitor MNX was synthesized using amine,ketone and aldehyde.Corrosion inhibitor YSH-05 for high-temperature acidification was prepared by combining inhibitor MNX and four synergistic agents (PA,XI,YCl and ZCl).Corrosion performance was evaluated by weight loss testing and anticorrosion mechanism was also studied.The corrosion rate of steel of inhibitor YSH-05 was 1~4 g/(m2·h) in 15wt% hydrochloric acid,hydrofluoric acid and earth acid media at 90 ℃,and the inhibitive efficiency was all above 99% and the temperature tolerance was as high as 150 ℃.