Naslov
Inhibition efficiency of natural compaunds on tin corrosion in salt solutions

Autori
Galić, Kata ; Ciković, Nada ; Hamin, Sandra ; Berković, Katarina

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the Eurocorr / European Federation of Corrosion - Riva del Garda : ASSOCIAZONE ITALIANA DI METALURGIA, 2001, 1-7

Skup
The European Corrosion Congress

Mjesto i datum
Riva del Garda, Italija, 30.09.2001. - 04.11.2001

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Corrosion inhibitors; cysteine; lysine; methionine; S-methyl-L-cysteine; sodium chloride; tin

Sažetak
In this paper the effect of some natural compounds on the electrochemical and corrosion behaviour of tin in sodium chloride solution was investigated. For this purpose, model salt solutions containing sodium chloride (3 - wt %) and added cysteine, methionine, lysine and S-methyl-L-cysteine at the concentrations from 10-5 to 10-2 wt %, were prepared. As a control electrolyte 3-wt % sodium chloride solution was used. From the potentiostatic polarisation data (using the standard three-electrode system) corrosion current (icorr.), corrosion potential (Ecorr.) and polarisation resistance (Rp) were calculated. The highest inhibition efficiency of methionine, lysine and S-methyl-L-cysteine ranged from 48 % to 79 %. The presence of cysteine, except at the concentration of 10-3 % in sodium chloride solution, acted as corrosion accelerator. Generally, a suitable well fitting linear correlation between amino acids concentration and investigated parameters (pH, k, icorr., Ecorr., Rp) was obtained.

Izvorni jezik
Engleski

Znanstvena područja
Biotehnologija, Prehrambena tehnologija

POVEZANOST RADA