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Inhibition of 304 stainless steel corrosion in acidic solution by Ferula gumosa (galbanum) extract
Author(s) -
Behpour M.,
Ghoreishi S. M.,
Kashani M. Khayat,
Soltani N.
Publication year - 2009
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.200905182
Subject(s) - tafel equation , corrosion , dielectric spectroscopy , polarization (electrochemistry) , adsorption , electrochemistry , materials science , nuclear chemistry , chemistry , anode , metallurgy , electrode , organic chemistry
The inhibition effect of the extract of galbanum ( Ferula gummosa Boiss.) on the corrosion of 304 stainless steel in 2 M HCl solution was studied by weight loss measurements, Tafel polarization, and electrochemical impedance spectroscopy (EIS) methods. It was found that the inhibition efficiency (IE) increases as the extract concentration is increased. Tafel polarization method revealed the mixed mode inhibition of galbanum extract (GE) with predominant control of anodic reaction. The effect of temperature on the corrosion behavior of steel indicates that inhibition efficiency of the natural substance increases with the rise in temperature. At all temperatures, the adsorption of the extract components onto the steel surface was found to follow the Temkin adsorption isotherm.