ǂAn ǂimpedance study of two types of stainless steel in Ringer physiological solution containing complexing agents

Mojca Slemnik (Avtor), Ingrid Milošev (Avtor)

Povzetek

The effect of complexing agents EDTA and citric acid on the electrochemical behaviour of AISI 304 and orthopaedic stainless steels in Ringer physiological solution was investigated by potentiodynamic polarization method and electrochemical impedance spectroscopy (EIS). The content of Mo has a pronounced effect on the corrosion resistance, as evident by the broader passive range of the orthopaedic stainless steel containing Mo. The addition of complexing agents induces significant changes in polarization and impedance characteristics, i.e., the shift of corrosion and breakdown potentials in a more negative direction, an increase in current density, and a significant decrease in charge transfer resistance. The results were interpreted by the formation of soluble complexes of metal ions with chelating agents, especially EDTA, which suppressed the formation of the outer Fe(III) layer of the passive film. The impact of complexing agent on the electrochemical parameters was found to be related to its concentration in electrolyte and the stability constant of the complex formed with the related metal ion.

Ključne besede

obstojnost materiala;korozijska obstojnost;nerjavno jeklo;ortopedija;potenciodinamična polarizacija;elektrokemijska impedančna spektroskopija;resistance;corrosion resistance;stainless steel;orthopedy;potentiodynamic polarization emthod;electrochemical impedance spectroscopy;

Podatki

Jezik:	Angleški jezik
Leto izida:	2006
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK:	620.193:617.3
COBISS:	10666262
ISSN:	0957-4530
Št. ogledov:	1412
Št. prenosov:	80
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarne ključne besede:	obstojnost materiala;korozijska obstojnost;nerjavno jeklo;ortopedija;potenciodinamična polarizacija;elektrokemijska impedančna spektroskopija;
URN:	URN:SI:UM:
Strani:	str. 911-918
Letnik:	ǂVol. ǂ17
Zvezek:	ǂno ǂ10
Čas izdaje:	Oct. 2006
ID:	8717114