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Corrosion inhibition of austenitic stainless steel by some pyrimidine compounds in hydrochloric acid
Author(s) -
Caliskan N.,
Akbas E.
Publication year - 2012
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.201005788
Subject(s) - tafel equation , dielectric spectroscopy , adsorption , corrosion , hydrochloric acid , langmuir adsorption model , polarization (electrochemistry) , materials science , pyrimidine , langmuir , cathodic protection , electrochemistry , austenitic stainless steel , inorganic chemistry , austenite , nuclear chemistry , chemistry , metallurgy , organic chemistry , electrode , stereochemistry , microstructure
The inhibition effect of two pyrimidine derivatives on the corrosion of austenitic stainless steel in 1 M HCl has been studied by Tafel plot, linear polarization, and electrochemical impedance spectroscopy (EIS) at 298 K. Results showed that compounds inhibited steel corrosion in a 1 M HCl solution and inhibition efficiencies increased with the concentration of inhibitor. Polarization curves indicated that all studied pyrimidine derivatives act as mixed type (cathodic/anodic) inhibitors. The adsorption of the inhibitors on the stainless steel surface was found to obey the Langmuir and Dubinin–Radushkevich adsorption isotherm models. Negative values of Δ G ads in the acidic media ensured the spontaneity of the adsorption process.