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The anti-corrosion behaviour of Satureja montana L. extract on iron in NaCl solution

The effect of Satureja montana L. extract (SM) and phenolic fraction of Satureja montana L. (PF) on the corrosion behaviour of iron in 0.1 mol L1 sodium chloride solution was studied by electrochemical techniques, UV/Vis spectrophotometry and atomic absorption spectrometry. The results of all techniques showed that SM and PF contributed to iron corrosion inhibition. The calculated inhibition efficiency values were about 45% for SM and 55% for PF. Results indicate that the inhibitive action occurs via a precipitation of the Fe- complex onto the iron surface which resulting in a decrease of the passive current density. The concentration of the iron ions released into solution, measured by atomic absorption spectrometry, was in accordance with the results obtained from the electrochemical techniques.

(iron ; corrosion ; Satureja montana L. ; phenolic compounds ; electrochemical methods)

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