Naslov
Corrosion behaviour of aluminium in acid-salt solutions

Autori
Ciković, Nada ; Šeruga, Marijan ; Berković, Katarina

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

Izvornik
Proceedings of the 32nd Meeting of International Society of Electrochemistry / - Dubrovnik : Cavtat, 1981, 992-995

Skup
32nd Meeting of International Society of Electrochemistry

Mjesto i datum
Cavtat, Hrvatska; Dubrovnik, Hrvatska, 13.09.1981. - 20.09.1981

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
aluminium ; acid-salt solutions ; corrosion

Sažetak
In this work corrosion behaviour of aluminium in different acid-salt solutions (acetic acid, sodium chloride and their mixtures) was investigated by the use of galvanostatic polarization of aluminium-steel couple. The influence of concentration of salt and acid and the atmosphere (air, oxygen or nitrogen flow) was also investigated.The results show the following. Corrosion behaviour of aluminium was mainly determined by the chemical composition of the solutions. In sodium chloride solution, as well as in the mixture of acetic acid and sodium chloride, in all concentrations and in all atmospheres, the aluminium was anodic in relation to the steel, which means that it is disolving in the process of corrosion. Only in the solution of acetic acid, in the air and oxygen atmospheres, aluminium becomes cathodic in relation to the steel. In this case the steel electrode is disolving. Examinations show that the corrosion current and corrosion rate increase with increasing concentration of the sodium chloride and acetic acid, in all atmospheres. The measurements show that the atmosphere above and in the solution has a great influence on the corrosion behaviour. The oxygen atmosphere proved to be a strong accelerator of the corrosion of aluminium. From the results of all measurements it can be concluded that aluminium is suitable as a material for producing the cans for packaging the foods with contained salts and acids (like e.g. sodium chloride and acetic acid). It is also advisable to avoid the oxygen during the packaging ; the best conditions for packaging is to fill the cans in the atmosphere of inert gas (e.g. nitrogen).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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