16 KB139 KB15 KB200020242009Donik, ČrtomirJenko, MonikaKocijan, Aleksandraštevilka:1letnik:43str. 39-42ISSN:1580-2949COBISSID:715690URN:URN:NBN:SI:doc-0QYJEFX9enInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeciklična voltametrijadupleksna jeklanerjavno jeklopasivni filmThe electrochemical study of duplex stainless steel in chloride solutions| Elektrokemijske raziskave dupleksnega nerjavnega jekla v kloridnih raztopinah|The evolution of the passive film formed on duplex stainless steel 2205 in a chloride solution was studied using cyclic voltammetry and potentiodynamic measurements. The anodic peaks in cyclic voltammograms at -0.6 V, 0 V and 1.1 V were identified with the formation of Fe(OH)sub2, FeOOH and the transpassive oxidation of Cr(III) to Cr(VI) and Ni(II) to Ni(IV), respectively. The reduction peaks at 0.3 V, -0.6 V and -0.8 V are attributed to valence transitions in solid state associated with the chromium and iron in the oxide, respectively. None of the current peaks detected in the voltammetric curves can be attributed to the Mo species aloneRaziskovali smo tvorbo pasivne plasti na površini dupleksnega nerjavnega jekla 2205 v kloridnih raztopinah s ciklično voltametrijo in potenciodinamsko polarizacijo. Anodne vrhove v cikličnih voltamogramih pri potencialih -0,6 V, 0 V in 1,1 V pripisujemo tvorbi Fe(OH)spodaj2, FeOOH in transpasivni oksidaciji Cr(III) v Cr(VI) in Ni(II) v Ni(IV). Pojav katodnih vrhov je povezan z redukcijo kromovih in železovih oksidov znotraj trdne faze. Nobenega od opaženih vrhov ne pripisujemo MoTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije