Pregled bibliografske jedinice broj: 631729
IMPROVEMENTS OF BIOCOMPATIBILITY OF AUSTENITIC STEEL ALLOYED WITH NITROGEN BY POTENTIODYNAMIC CYCLIZATION
IMPROVEMENTS OF BIOCOMPATIBILITY OF AUSTENITIC STEEL ALLOYED WITH NITROGEN BY POTENTIODYNAMIC CYCLIZATION // Knjiga sažetaka, XXIII. hrvatski skup kemičara i kemijskih inženjera
Osijek, Hrvatska, 2013. str. 218-218 (poster, domaća recenzija, sažetak, znanstveni)
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Naslov
IMPROVEMENTS OF BIOCOMPATIBILITY OF AUSTENITIC STEEL ALLOYED WITH NITROGEN BY POTENTIODYNAMIC CYCLIZATION
Autori
Grubač, Zoran ; Lajci, Nushe ; Metikoš-Huković, Mirjana ; Babić, Ranko
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Knjiga sažetaka, XXIII. hrvatski skup kemičara i kemijskih inženjera
/ - , 2013, 218-218
ISBN
978-953-6894-50-5
Skup
XXIII. hrvatski skup kemičara i kemijskih inženjera
Mjesto i datum
Osijek, Hrvatska, 21.04.2013. - 24.04.2013
Vrsta sudjelovanja
Poster
Vrsta recenzije
Domaća recenzija
Ključne riječi
austenitic steel; biocompatibility
Sažetak
Passivation of stainless steel implants is a common procedure used to increase their biocompatibility [1]. Cyclic potentiodynamic polarization, as a surface treatment method, has been reported as an efficient method to modify the chemical and electronic properties of passive films on austenitic stainless steels [2, 3]. In the present study the passive electrode of austenitic stainless steel alloyed with nitrogen (ASS N25) was modified by the cyclic linear potentiodynamic polarization (CLPP) method in a NaNO3 solution and the effect of CLPP on the barrier and semiconducting properties of the passive film was investigated in physiological solutions using electrochemical impedance spectroscopy (EIS) measurements and Mott-Schottky (M-S) analysis. The results obtained have showed that CLPP significantly improve the pitting and general corrosion resistance of stainless steel in chloride containing solutions. A thick and compact passive oxide film with a roughness texture at a nano-scale offers up to 98% relative protection efficiency against general corrosion in physiological solutions. The conversion of the type of semiconductivity from n to p takes place in the pitting susceptible region of the passive film. Such a semiconductor p-n junction (Schottky barrier) generates a high potential barrier for electrons in the passive film, i.e., it increases the polarization resistance of the passive film.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Projekti:
125-0982904-2923 - Novi materijali i katalizatori za održive tehnologije (Metikoš-Huković, Mirjana, MZOS ) ( CroRIS)
Ustanove:
Fakultet kemijskog inženjerstva i tehnologije, Zagreb
