Study of Synergistic Effect of Iodide on the Corrosion Antagonistic Behaviour of a Heterocyclic Phenylhydrazone in Sulphuric Acid Medium on Carbon Steel | Zendy

Vinod P. Raphael | Zendy; Joby Thomas Kakkassery | Zendy; Shaju K. Shanmughan | Zendy; Aby Paul | Zendy

Open Access

Study of Synergistic Effect of Iodide on the Corrosion Antagonistic Behaviour of a Heterocyclic Phenylhydrazone in Sulphuric Acid Medium on Carbon Steel

Author(s) -

Vinod P. Raphael,

Joby Thomas Kakkassery,

Shaju K. Shanmughan,

Aby Paul

Publication year - 2013

Publication title -

isrn corrosion

Language(s) - English

Resource type - Journals

ISSN - 2090-8903

DOI - 10.1155/2013/390823

Subject(s) - gravimetric analysis , dielectric spectroscopy , carbon steel , corrosion , adsorption , langmuir adsorption model , iodide , chemistry , metal , inorganic chemistry , polarization (electrochemistry) , electrochemistry , nuclear chemistry , corrosion inhibitor , metal ions in aqueous solution , organic chemistry , electrode

Synergistic effect of KI on the corrosion inhibition efficiency of 3-acetylpyridine phenylhydrazone (3APPH) on carbon steel (CS) in 0.5 M sulphuric acid solution has been investigated using gravimetric studies, electrochemical impedance spectroscopy (EIS), and potentiodynamic polarization studies. Gravimetric corrosion studies revealed that 3APPH showed moderate corrosion inhibition efficiency up to 8 h and beyond this period it showed corrosion accelerating behavior. This antagonistic effect of 3APPH is due to the hydrolysis of the molecule in acidic medium. A very high percentage of inhibition efficiency at 24 h was obtained on the addition of KI due to the synergistic effect of iodide ions. The adsorption of 3APPH and 3APPH

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