Sulfur Containing Compounds as Corrosion Inhibitors for Mild Steel in Hydrochloric Acid Solution


Jafari H., SAYIN K.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, cilt.69, ss.805-815, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 69 Konu: 3
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1007/s12666-015-0556-2
  • Dergi Adı: TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
  • Sayfa Sayıları: ss.805-815

Özet

The role of Sulfur containing compounds namely: Thiobarbituric acid (TBA) and Thiourea (TH) as corrosion inhibitors for mild steel in 1 M HCl has been studied using potentiodynamic anodic polarization, electrochemical impedance spectroscopy, atomic force microscopy and scanning electron microscopy techniques. Polarization results showed that all the compounds studied are mixed type inhibitors. Electrochemical impedance studies showed that the presence of these compounds decreases the double-layer capacitance and increases the charge transfer resistance. Quantum chemical calculation was further applied to reveal the adsorption structure and explain the experimental results. The results of calculations showed superior inhibition efficiency of TH in comparison to TBA.