Naslov
THE EFFECT OF L-TRYPHOPHAN ON THE CORROSION OF ALUMINIUM IN SODIUM CHLORIDE SOLUTION

Autori
Berković, Katarina ; Vorkapić-Furač, Jasna ; Ciković, Nada ; Prejac, Sandra

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Electrochemistry at the Turn of the Millenium / The International Society of Electrochemistry, 2000. - Varšava : ISE (The Electrochemical Society), 2000

Skup
51st Annual ISE Meeting, Electrochemistry at the Turn of the Millenium

Mjesto i datum
Varšava, Poljska, 03.09.2000. - 08.09.2000

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
L-tryptophan; aluminium corrosion in salt solutions

Sažetak
In many aspects L-tryptophan is one of the most interested amino acids because of the complexity of its metabolism, metabolites and the diversity of diseases it is involved in. L-tryptophan plays a direct role in regulating plant development and is the limiting amino acid in several protein sources that are of importance for human nutrition. The effect of L-tryptophan on the corrosion behaviour of aluminium in salt solution was investigated. The system was chosen to perform the corrosion process that could take place in canned vegetable product, as L-tryptophan is one of the aminoacids in plant composition. For this purpose model solutions were prepared as follows: 3% (w/w) sodium chloride, L-tryptophan (10-5, 10-4 and 10-3 mol/dm3) solutions and mixed solutions of 3% (w/w) NaCl with (10-5, 10-4 and 10-3 mol/dm3) L-tryptophan. The physico-chemical and corrosion parameters of aluminium were determined in model solutions using polarization methods (Tafel extrapolation method and polarization resistance determination). Inhibition efficiency was calculated from the potentiostatic polarization data, and polarization resistance data. From the results obtained by both methods used it was evident that corrosion current in L-tryptophan solutions showed negligible value in comparison with salt solutions. The all investigated concentrations of L-tryptophan, except for the smallest one, have shown high inhibition efficiency (84%).

Izvorni jezik
Engleski

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