STUDY ON THE CORROSION INHIBITION OF CCT34 STEEL BY THIOSEMICARBAZONE

Abstract

The benzaldehyde thiosemicarbazone (Hthbz) and acetophenone thiosemicarbazone (Hthacp) were synthesised from the reaction of benzaldehyde or acetophenone and thiosemicarbazide. Structure and spectroscopic of thiosemicarbazones has been studied. The result of methods: IR, 1H -NMR, 13C -NMR show that thiosemicarbazones has been formed and in the thionic state. The influence of them on the corrosion inhibition of CCT34 steel in acid media has been studied. The results of corrosion evaluation via weigh loss method, potentiodynamic polarization and test method for accelerating in a climate
cabinet show that: inhibition efficiency based on current density value reachs over 90% with 3,0.10-4 M Hthbz or Hthacp in medium.