Antibacterial drugs as environmentally-friendly corrosion inhibitors for carbon steel in acid medium

作者：Nazeer Ahmed Abdel^*; El Abbasy H M; Fouda A S

来源：Research on Chemical Intermediates, 2013, 39(3): 921-939.

DOI：10.1007/s11164-012-0605-y

• Steel
• Polarization
• SEM
• EIS
• EFM
• Acid inhibition

The effect of cefazolin (CZ) and cefotaxime (CT) as corrosion inhibitors for carbon steel in 0.5 M H2SO4 solution was investigated by use of potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), and scanning electron microscopy (SEM). CZ and CT acted as mixed-type inhibitors. Inhibition increased with increasing inhibitor concentration and decreased with increasing temperature. Adsorption of the inhibitors obeyed the Langmuir adsorption isotherm. SEM confirmed inhibition by the inhibitors. Inhibition by 5 x 10(-4) M CZ and 7 x 10(-4) M CT approached 99.6 % and 90.9 %, respectively. The EIS and EFM results were in good agreement with the potentiodynamic data.

• 出版日期2013-3