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Zaštita materijala
2014, vol. 55, br. 4, str. 387-394
jezik rada: engleski
vrsta rada: naučni članak
doi:10.5937/ZasMat1404387J


Otpornost prema koroziji aluminijumske legure serije 7000 posle novog dvostepenog termičkog taloženja
aUniverzitet u Beogradu, Institut za hemiju, tehnologiju i metalurgiju - IHTM, Beograd
bUniverzitet u Beogradu, Tehnološko-metalurški fakultet

Projekat

Sinteza, razvoj tehnologija dobijanja i primena nanostrukturnih multifunkcionalnih materijala definisanih svojstava (MPNTR - 45019)
Razvoj triboloških mikro/nano dvokomponentnih i hibridnih samopodmazujućih kompozita (MPNTR - 35021)

Sažetak

Otpornost prema koroziji aluminijumske legure serije 7000 ispitivana je primenom različitih elektrohemijskih metoda. Legura je bila podvrgnuta jednostepenom i novom dvostepenom termičkom taloženju. Polarizaciona merenja u 3,5 mas.% NaCl su pokazala da legura posle dvostepenog termičkog taloženja ima pozitivniju vrednost potencijala pitinga (Epit) i veću otpornost prema koroziji. Spektroskopija elektrohemijske impedancije (SEI) je takođe pokazala da legura posle dvostepenog termičkog taloženja ima bolju otpornost prema koroziji (veću vrednost polarizacione otpornosti, Rp i manju vrednost kapacitivnosti dvojnog sloja, Cdl) u poređenju sa legurom posle jednostepenog termičkog taloženja.

Ključne reči

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