Naslov
Electrochemical study of AISI 316L steel after welding

Autori
Kožuh, Stjepan ; Gojić, Mirko ; Sorić, Tomislav

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts RSE-SEE / Horvat-Radošević, Višnja ; Mandić, Zoran ; Gojo, Miroslav - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2008, 357-358

ISBN
978-953-6894-33-8

Skup
1st Regional Symposium on Electrochemistry of South-East Europe

Mjesto i datum
Rovinj, Hrvatska, 04.08.2008

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
stainless steel ; welding ; cyclic polarization ; electrochemical impedance spectroscopy

Sažetak
The subject of investigation was the corrosion behavior of the base and weld metals as dependent on a protective passive film formed on the steel surface following exposure to 3.5 % NaCl (pH=5.0). Cyclic polarization was performed in the potential range from – 1.0 to +2.0 V(Ag/AgCl) at different scan rates (10, 50, and 100 mV/s). Impedance measurements were carried out in the range of potential where hydrogen evolution reaction exists and in the passive region (from – 0.2 to +0.5 V(Ag/AgCl)).The pitting potential (Epit) of the weld metal was more positive (0.586 V) than of the base metal (0.472 V), but repassivation potentials (Erp) were the same. A relatively wide plateau of the potential-independent current indicated that passivity was present over a broad potential region (from – 0.2 to +0.5 V(Ag/AgCl)). The Nyquist plots showed a higher charge transfer resistance for the weld metal than for the base metal suggesting an enhanced thickness of the passive film on the weld metal surface.

Izvorni jezik
Engleski

Znanstvena područja
Metalurgija

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