Corrosion Resistance of an Acidizing Inhibitor

A new type of Mannich base corrosion inhibitor (IMTOM) was synthesized based on an imdizoline derivative (IMTO). The corrosion inhibition performance and corrosion inhibition mechanism of IMTO and IMTOM corrosion inhibitors were studied by corrosion immersion test and electrochemical test. The results show that IMTO and IMTOM had good corrosion inhibition effect on 10 steel in 36% (mass fraction) HCl solution. And their corrosion inhibition efficiency increased with the increase of the dosage of corrosion inhibitors. IMTOM had better corrosion inhibition effect than IMTO. When the dosage of IMTOM was 3 g/L, its corrosion inhibition efficiency calculated through weight loss method could reach to over 90%. Both IMTO and IMTOM were anodic corrosion inhibitors whose adsorption on metal surface followed Langmuir isothermal adsorption.