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Zaštita materijala
2015, vol. 56, br. 2, str. 159-163
jezik rada: engleski
vrsta rada: izvorni naučni članak
objavljeno: 29/10/2015
doi: 10.5937/ZasMat1502159M
Reflektivnost elektrohemijski zaštićenih Nb površina
University ' Ss. Cyril and Methodius', Faculty of Technology and metallurgy, Skopje, Republic of Macedonia

Sažetak

Koroziona otpornost fino mehanički poliranih i elektropoliranih Nb površina testirana je pomoću elipsometriskih merenja reflektivnosti kod različitih upadnih uglova incidentnog zraka. Ista merenja bila su ponovljena i kod elektropoliranih Nb površina anodno oksidiranih u 1 M H2SO4 u vremenu od 30 s za potencijalno/naponsko područje od 0 do 100 V. Od minimalne vrednosti merene reflektivnosti, koja je paralelna upadnoj ravni, odredjivan je Brewsterov ugao za svaki ispitivani primerak. Simultana merenja korozionih parametara i Brewsterovog ugla pokazala su da vrednosti Brewsterovih ugla mogu da se koriste za brzo testiranje kvaliteta zatićenih metalnih površina.

Ključne reči

niobijum; film anodnog oksida; elipsometrija; Brewsterov ugao

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