AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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STUDIA CHEMIA - Ediţia nr.3 din 2013 | |||||||
Articol: |
EVALUATION OF PHENOTHIAZINE AS ENVIRONMENTALLY FRIENDLY CORROSION INHIBITOR FOR BRONZE IN SYNTHETIC ACID RAIN. Autori: ROXANA BOSTAN, SIMONA VARVARA, MARIA POPA. |
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Rezumat:
Inhibition performance of phenothiazine as safe corrosion inhibitor for bronze in a solution containing Na2SO4 and NaHCO3 (pH=5) that simulates an acid rain in an urban environment was investigated by potentiodynamic polarization and electrochemical impedance measurements. The results showed that phenothiazine is a fairly efficient inhibitor towards bronze corrosion, even when added in μM concentration range. The inhibition efficiency of phenothiazine increases with its concentration and attains a value higher than 91% at 150 μM concentration level. The adsorption of phenothiazine on bronze surface obeys the Langmuir’s isotherm. Phenothiazine was proved to be a promising environmentally-safe alternative to the harmful corrosion inhibitors used for the protection of bronze against corrosion in aggressive media. Key words: bronze, corrosion, phenothiazine, electrochemical impedance spectroscopy, polarisation curve
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