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Localised corrosion in stainless steels-An integrated approach to identify risk conditions
RISE, Swerea, Swerea KIMAB.
2011 (English)In: 7th European Stainless Steel Conference: Science and Market, Proceedings, Associazione Italiana di Metallurgia , 2011Conference paper, Published paper (Refereed)
Abstract [en]

Stainless steels have superb corrosion resistance compared with the vast majority of engineering materials and can withstand a wide range of aggressive conditions. However, there is a risk of localised corrosion, in the form of pitting, crevice corrosion or stress corrosion cracking, in some chloride-containing environments. Work within a recently-concluded European project has focussed on using relatively rapid laboratory testing in an integrated approach to map the risk areas for all three of these types of localised corrosion. In this paper measurements of critical temperatures for pitting and crevice corrosion are evaluated and compared for two very different stainless steels grades: the standard austenitic EN 1.4404 (316L) and the superduplex EN 1.4410 (2507). Stress corrosion cracking is also evaluated using constant load and slow strain rate testing. Two different chloride environments have been employed: sodium chloride and magnesium chloride. Similarities and differences between the two environments are highlighted and a series of screening test for evaluation of new materials is proposed and applied to EN 1.4462 (2205) as an example.

Place, publisher, year, edition, pages
Associazione Italiana di Metallurgia , 2011.
Keyword [en]
Chloride, Corrosion, Crevice, Pitting, Stainless, Stress corrosion
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-12959ISBN: 9788885298842 (print)OAI: oai:DiVA.org:ri-12959DiVA: diva2:973152
Conference
7th European Stainless Steel Conference: Science and Market, 21 September 2011 through 23 September 2011, 114650
Available from: 2016-09-22 Created: 2016-09-22Bibliographically approved

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Swerea KIMAB
Materials Engineering

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