Synthesis and Performance Evaluation of a Mannich Base as Acidizing Corrosion Inhibitor

A new acidizing corrosion inhibitor was synthesized by Mannich reaction with formaldehyde,aromatic ketone and amine.According to the corrosion inhibiting effect to N-80 steel in hydrochloric acid,the synthesizing conditions were optimized through orthogonal experiments.The performance of corrosion inhibitor JH-C synthesized at optimum conditions was evaluated at various temperatures and inhibitor amounts using weight loss method.And the results showed that,the rate of corrosion was less than 2.0 g·(m2·h)-1 by adding 0.5% inhibitor JH-C which had excellent inhibiting performance at 30~90℃.