Open AccessCorrosion inhibition of iron in chloride media by the aqueous extract of Curcuma longa rhizome powder
Author(s) -
Imen Abidli
Publication year - 2021
Publication title -
maǧallaẗ al-kuwayt li-l-ʿulūm
Language(s) - English
Resource type - Journals
eISSN - 2307-4116
pISSN - 2307-4108
DOI - 10.48129/kjs.v48i2.8855
Subject(s) - dielectric spectroscopy , curcuma , aqueous solution , rhizome , corrosion , langmuir adsorption model , chemistry , adsorption , nuclear chemistry , chloride , electrochemistry , organic chemistry , traditional medicine , electrode , medicine
The effect of the aqueous extract of Curcuma Longa Rhizome Powder and their main constituents involve phenolic compounds, as an iron corrosion inhibitor in 0.1 M NaCl solution was tested. Electrochemical impedance spectroscopy (EIS) was employed as the main experimental technique to assess the electrochemical behavior of iron in different concentrations of Curcuma extract. EIS revealed an increase of the charge transfer resistance with increasing inhibitor concentration. The temperature and immersion time effects on the corrosion behavior of iron without and with the extract of Curcuma were also studied. The inhibition action of the extract was discussed in view of the Langmuir adsorption isotherm.