Effects of secondary phase precipitation on corrosion properties of duplex stainless steels

O. Smuk, Pertti Nenonen, H. Hänninen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

An ATEM study of the precipitation of secondary phases in the temperature range of 600-800°C was undertaken for two P/M-HIP super duplex stainless steel grades. It was shown that main secondary phase precipitating after the aging treatment at 600°C for 10 h is R phase, at 700°C for 2 h chi phase, and at 800°C for 30 min sigma phase, respectively. The corrosion resistance of duplex stainless steels was analyzed from the point of view of the morphology and composition of the precipitating phases. It was also shown that aging treatment of copper-containing duplex steel results in precipitation of Cu-rich particles. The effects of the precipitated copper particles on corrosion and mechanical properties of the steel are discussed, as well as their possible indirect effects via intermetallic phases.
Original languageEnglish
Title of host publication10th International Symposium on Corrosion in the Pulp and Paper Industry, ISCPPI. Vol. 2
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages599-608
ISBN (Electronic)951-38-5724-7
ISBN (Print)951-38-5721-2
Publication statusPublished - 2001
MoE publication typeA4 Article in a conference publication
Event10th International Symposium On corrosion in the Pulp and Paper Industry, ISCPPI - Helsinki, Finland
Duration: 21 Aug 200124 Aug 2001

Publication series

SeriesVTT Symposium
Number215
ISSN0357-9387

Conference

Conference10th International Symposium On corrosion in the Pulp and Paper Industry, ISCPPI
Abbreviated title10th ISCPPI
CountryFinland
CityHelsinki
Period21/08/0124/08/01

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  • Cite this

    Smuk, O., Nenonen, P., & Hänninen, H. (2001). Effects of secondary phase precipitation on corrosion properties of duplex stainless steels. In 10th International Symposium on Corrosion in the Pulp and Paper Industry, ISCPPI. Vol. 2 (pp. 599-608). VTT Technical Research Centre of Finland. VTT Symposium, No. 215