INVESTIGATION OF SOME SCHIFF BASES AS CORROSION INHIBITORS FOR ALUMINIUM ALLOY IN 0.5 M HYDROCHLORIC ACID SOLUTIONS
| Autor: | M. T. Muniandy, Hussein Ali Osman, P. Bothi Raja, A. Mohd Shah, Solhan Yahya, Afidah Abdul Rahim |
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| Rok vydání: | 2011 |
| Předmět: |
Scanning electron microscope
Inorganic chemistry Langmuir adsorption model Hydrochloric acid Surfaces and Interfaces Condensed Matter Physics Surfaces Coatings and Films Corrosion Corrosion inhibitor chemistry.chemical_compound symbols.namesake Adsorption chemistry visual_art Materials Chemistry symbols Aluminium alloy visual_art.visual_art_medium Aluminium alloy corrosion inhibitor Schiff bases Benzene |
| Zdroj: | Surface Review and Letters. 18:127-133 |
| ISSN: | 1793-6667 0218-625X |
| Popis: | The inhibitory effect of some Schiff bases viz. N,N′-bis(2-hydroxybenzylidene)-1,3-diaminobenzene (SB1), N,N′-bis(4-bromobenzylidene)-1,3-diaminobenzene (SB2) and N,N′-bis(2-hydroxy-5-bromobenzylidene)-1,3-diaminobenzene (SB3) on the corrosion of aluminium alloy in 0.5 M HCl acid have been studied using weight loss measurements, potentiodynamic polarization and Scanning Electron Microscopy (SEM). The experimental results showed that these Schiff bases SB1, SB2 and SB3 efficiently inhibit the corrosion of aluminium alloy in 0.5 M HCl medium and found to follow almost similar corrosion inhibition pattern. The potentiodynamic polarization curves revealed that, all the studied Schiff bases are mixed type inhibitors with a predominantly cathodic action and their inhibition efficiencies increased with increasing inhibitor concentration. The adsorption of Schiff bases was found to follow Langmuir adsorption isotherm. SEM study revealed that these compounds protect the metal corrosion by adsorption on its surface to form a protective layer. The inhibition performance depends strongly on the type of functional groups substituted on the benzene ring. |
| Databáze: | OpenAIRE |
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