In situ study of selective dissolution of duplex stainless steel 2205 by electrochemical scanning tunnelling microscopy
2001 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 43, no 10, 1939-1951 p.Article in journal (Refereed) Published
Selective dissolution of duplex stainless steel 2205 in acidic chloride solutions was studied in situ by electrochemical scanning tunnelling microscopy (STM). In 0.05 M H2SO4 + 1 M NaCl, no appreciable active dissolution was observed by in situ STM imaging at the corrosion potential (E-corr), but at potentials higher than E-corr + 1000 mV some selective dissolution at the austenite-ferrite boundary region occurred. In 4 M H2SO4 + 1 M HCl, STM images revealed active dissolution of ferrite grains at around E-corr + 50 mV. Dissolution of austenite grains started to occur at around E-corr + 150 mV, exhibiting steps of submicron scale on the edges.
Place, publisher, year, edition, pages
2001. Vol. 43, no 10, 1939-1951 p.
duplex stainless steel, in situ, local, electrochemical scanning tunnelling microscopy, selective dissolution, single-crystal surfaces, tunneling-microscopy, pitting corrosion, localized corrosion, spectroscopy, electrodes, nitrogen, xps
IdentifiersURN: urn:nbn:se:kth:diva-20910ISI: 000170674800011OAI: oai:DiVA.org:kth-20910DiVA: diva2:339607
QC 201005252010-08-102010-08-10Bibliographically approved