Corrosion inhibition of austenitic stainless steel by some pyrimidine compounds in hydrochloric acid | Zendy

Caliskan N. | Zendy; Akbas E. | Zendy

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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.

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