In this study, the inhibitive properties
of Myrtus Communis in
sulfuric acid solution on the copper surface were examined by weight
loss, potentiodynamic polarization, electrochemical impedance spectroscopy,
atomic force microscopy, and scanning electron microscopy methods.
Weight loss and electrochemical analysis showed that the Myrtus Communis
extract was a highly efficient mixed type inhibitor. Also, it was
found that the adsorption of Myrtus extract on the copper surface
followed Langmuir adsorption isotherm. The inhibition efficiency was
found to be increased with increasing immersion time of samples in
the solution. Surface analysis attested to the inhibition action of
Myrtus Communis extract as well.
The corrosion inhibition characteristics of cation-rich and anion-rich catanionic mixtures of cetyltrimethyl ammonium bromide (CTAB) and sodium dodecyl sulfate (SDS) as corrosion inhibitor for mild steel (MS) in aqueous solution of 2 M HCl were investigated. The interaction between the two surfactants in the solid−liquid interface was analyzed on the basis of regular solution theory for the first time. Mixed surfactants showed good inhibition properties due to strong adsorption on the surface and formation of a protective film. Adsorption of the inhibitors obeyed the Flory−Huggins isotherm. Potentiodynamic polarization investigations indicated that the inhibitors studied were mixed-type inhibitors.
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