On Construction of the Structures of Adsorbed Films of Mefenamic and Phenylundecanoic Acids on Passive Iron

Yu. I. Kuznetsov, N. P. Andreeva, N. P. Sokolova,
R. A. Bulgakova, and A. M. Gorbunov

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia; e-mail: Этот e-mail защищен от спам-ботов. Для его просмотра в вашем браузере должна быть включена поддержка Java-script

Received October 25, 2006

Abstract — Successive adsorption of the components of a mixed inhibitor at oxidized iron was further studied by ellipsometry and IR spectroscopy. The mixed inhibitor was composed of salts of aromatic amino acids, viz., sodium mefenamate (SMEF) NaOOCC₆H₄NHC₆H₃(CH₃)₂ and sodium phenylundecanoate (SPU) C₆H₅(CH₂)₁₀COONa. Ultrathin adsorbed films obtained on oxidized iron by different methods were tested in a moist atmosphere to compare their protective properties. Adsorbed PU forms an iron complex on oxidized iron. Adsorption of MEF anions over a PU layer changes the IR spectral pattern, thus indicating a change in the adsorption mechanism
of MEF anions in the presence of PU anions.

PACS numbers: 82.45.Bb

DOI: 10.1134/S0033173207040017