Synthesis of Bimannich Base with Thiazole and Its Corrosion Inhibition Effect on H2S and CO2 at High Temperature

Abstract A bimannich base TZBM containing a thiazole structure was obtained by the mannich base synthesis method. TZBM can maintain a stable structure at 260°C, and has a good corrosion inhibition effect on carbon steel in a gas-liquid environment containing Cl−+H2S + CO2 at 180°C. Through the weight loss test of steel under different concentrations of TZBM, the degree of surface coverage of the adsorbed inhibitor is determined, and it was found that the results obey the Langmuir adsorption isotherm. And the negative Gibbs free energy indicates that the adsorption is spontaneous.