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In situ study of selective dissolution of duplex stainless steel 2205 by electrochemical scanning tunnelling microscopy
KTH, Tidigare Institutioner                               , Materialvetenskap.ORCID-id: 0000-0002-4431-0671
KTH, Tidigare Institutioner                               , Materialvetenskap.ORCID-id: 0000-0002-9453-1333
2001 (Engelska)Ingår i: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 43, nr 10, s. 1939-1951Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

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.

Ort, förlag, år, upplaga, sidor
2001. Vol. 43, nr 10, s. 1939-1951
Nyckelord [en]
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
Identifikatorer
URN: urn:nbn:se:kth:diva-20910ISI: 000170674800011OAI: oai:DiVA.org:kth-20910DiVA, id: diva2:339607
Anmärkning
QC 20100525Tillgänglig från: 2010-08-10 Skapad: 2010-08-10 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Pan, JinshanLeygraf, Christofer

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