IMPROVENENT OF SYNTHESIS METHOD OF MANNICH BASE INHIBITOR

Mannich base was synthesized by the Mannich reaction from formaldehyde,cyclohexylamine and acetophenone.The effect of material ratio on inhibiting action was investigated and the reaction conditions were determined.When the mass ratio of formaldehyde,cyclohexylamine and acetophenone was 3∶2∶3,the inhibition efficiency was best.At 60 ℃,20% HCl with 1.0% inhibitor,the corrosion rate was 0.36 g·m-2·h-1.At 90 ℃,20% HCl with 2.0% inhibitor,the corrosion rate was 1.2 g·m-2·h-1.