OXYGEN REDUCTION ON A DUPLEX STAINLESS-STEEL

Authors
GOJKOVIC SL ZECEVIC SK OBRADOVIC MD DRAZIC DM
Citation
Sl. Gojkovic et al., OXYGEN REDUCTION ON A DUPLEX STAINLESS-STEEL, Corrosion science, 40(6), 1998, pp. 849-860
Citations number
17
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
Journal title
Corrosion science → ACNP
ISSN journal
0010938X
Volume
40
Issue
6
Year of publication
1998
Pages
849 - 860
Database
ISI
SICI code
0010-938X(1998)40:6<849:OROADS>2.0.ZU;2-K
Abstract
O-2 reduction on duplex stainless steel was investigated in neutral an d alkaline solutions with and without the presence of chloride ions. A ll polarization curves showed hysteresis with higher reaction rate in positive going sweep than in the negative one. Tafel slopes of about - 90 mV dec(-1) in neutral and alkaline solutions without chloride ions and about -150 mV dec(-1) in NaCl solution were obtained. Reaction rat e is almost independent on pH in solutions of pH < 12 while in more al kaline solutions reaction order with respect to OH- ions of about -1 w as obtained. Reaction rate and kinetic parameters for O-2 reduction on duplex stainless steel were compared to data for O-2 reduction on pur e Fe and great similarity was found. (C) 1998 Elsevier Science Ltd. Al l rights reserved.