A Sulphuric Solution Inhibitor Containing Dithiocarbamate and Its Anti-corrosion Effect on Copper

A copper corrosion inhibitor of triethylenetetramine-bisdithiocarbamate sodion (DTCT) used in sulphuric acid was synthesized and its structure was characterized by FTIR and UV spectroscopy.The EIS results indicated that the impedance values of brass electrodes initially increased with the DTCT concentration,reached a maximum at 75 mg/L.Then the impedance values decreased a little with further increase of DTCT concentration.The weight-loss results showed that DTCT had a relatively good inhibition efficiency of 65% in 0.5 mol/L H2SO4 at a concentration of 75 mg/L.