Inhibitory efficiency of oxalic N-phenylhydrazide-N′-phenylthiosemicarbazide on corrosion of carbon steel in 0·5M H2SO4
| Autor: | M. C. Bernard, R. Rehamnia, Suzanne Joiret, L. Larabi, B. Talhi, H. Takenouti, H. Saifi, R. Bensalem |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Materials science Aqueous solution Carbon steel 020209 energy General Chemical Engineering Inorganic chemistry 02 engineering and technology General Chemistry engineering.material 021001 nanoscience & nanotechnology Electrochemistry Organic compound Corrosion Dielectric spectroscopy Adsorption chemistry 0202 electrical engineering electronic engineering information engineering engineering General Materials Science 0210 nano-technology Voltammetry |
| Zdroj: | Corrosion Engineering, Science and Technology. 49:688-694 |
| ISSN: | 1743-2782 1478-422X |
| DOI: | 10.1179/1743278214y.0000000195 |
| Popis: | The inhibitory effect of an oxalic type organic compound oxalic N-phenylhydrazide-N′-phenylthiosemicarbazide on the corrosion of carbon steel in 0·5M H2SO4 aqueous solution was investigated by different experimental methods; gravimetry, voltammetry and electrochemical impedance spectroscopy. The surface state of the electrode after immersion of the steel coupons in corrosion test solutions, in absence and in presence of the inhibitor was characterised by scanning electron microscopy. The potentiodynamic polarisation measurements showed that the presence of the inhibitor in 0·5M H2SO4 decreased both cathodic and anodic processes. The action of this inhibitor is therefore of a mixed type. The electrochemical impedance measurements showed the adsorption of the inhibitor. The inhibitory efficiency reaches a value of 95% at an inhibitor concentration of 10−3M. |
| Databáze: | OpenAIRE |
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