Title: Protection of duplex stainless steel from localized corrosion by surface "superpassivation"
Authors: Zheng, Jian Hua ×
Bogaerts, Walter
Celis, Jean-Pierre
Roos, Jozef #
Issue Date: Feb-1994
Publisher: Elsevier science sa lausanne
Series Title: Materials science and engineering a-structural materials properties microstructure and processing vol:174 issue:2 pages:L45-L49
Abstract: So-called superpassivation surface treatment was conducted on a 22Cr-5Ni-3Mo-N duplex stainless steel, and its pitting and stress corrosion cracking (SCC) behaviour is studied in hot concentrated chloride solutions using cyclic polarization measurements and potential-controlled constant load tests. The results indicate that ''superpassivated'' steel has an excellent pitting resistance and - consequently - also a very good resistance to SCC since SCC of the duplex stainless steel initiates from pitting in the studied environments. Auger electron spectroscopy analyses show that the passivation treatment leads to a thick highly chromium-enriched passive film. Improved resistance of the duplex stainless steel to pitting and SCC is attributed to the existence of this him.
ISSN: 0921-5093
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Chemical and Extractive Metallurgy Section (-)
Department of Materials Engineering - miscellaneous
× corresponding author
# (joint) last author

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