Abstract
ENHANCED SYNERGISTIC EFFECTS OF TRISODIUM 2- HYDROXYPROPANE-1,2,3-TRICARBOXYLATE ON THE INHIBITION EFFICIENCY OF 5-METHYL BENZOTRIAZOLE SYSTEM ON BRASS IN AQUEOUS ENVIRONMENT

T.Gowrani*, P.Manjula, Nirmala Baby, K.N.Manonmani, R.Sudha, T.Vennila

ABSTRACT

The corrosion inhibition of brass in 3% NaCl in the presence of 5- methyl benzotriazole (MBT) and Trisodium 2-hydroxypropane-1,2,3- tricarboxylate (TSPC) has been investigated using mass loss method, electrochemical techniques and solution analysis. Analysis of results revealed that of MBT inhibits 71% at optimum concentration(150 ppm). The addition of TSPC with MBT enhanced the inhibitive effect upto 90% and showed a synergism of inhibition. Potentiodynamic polarization results suggested that the MBT and the mixture of MBT and TSPC behave as mixed type inhibitors. The results of solution analysis by atomic adsorption spectroscopy showed that the mixture of MBT and TSPC effectively controlled the dezincification of brass. EDX analysis was used to determine the nature of the protective film formed on the metal surface.

Keywords: Brass, 5-methyl benzotriazole, Trisodium 2-hydroxypropane-1,2,3- tricarboxylate .


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