EXTRATO DA FOLHA DO "MURICI" COMO INIBIDOR DA CORROSÃO DO AÇO CARBONO EM MEIO ÁCIDO

Resumo

Green inhibitors are increasingly studied with the aim of reducing the use of toxic compounds used in pickling baths in the industry. This study aimed to determine the inhibitory efficiency (IE) of the organic extract obtained from the leafs of "murici" corrosion on carbon steel surface in HCl 1 M. It was performed immersion with bulk loss test and electrochemical techniques are used. Cyclic voltammetry showed that the addition of the extract promotes cathodic inhibition. From the polarization curves, the IE was estimated at 36 and 49% for 260 and 1000 ppm-concentrations of the extract, respectively. It is concluded that the extract in question is a satisfactory corrosion inhibitor to carbon steel in HCl 1M.