Thick corrosion products of austenitic stainless steel obtained from a steam turbine structure exposed in offshore environment were studied by optical stereomicroscopy, X-ray diffraction, Mössbauer and energy-dispersive X-ray spectroscopy. The external surface of mechanical structure was exposed to a marine atmosphere and the internal one to a combustion gas for two decades. Characterization of corrosion products showed high content of akaganeite in the outer region and a mixture of akaganeite and hematite in the inner surface. Besides these characteristics, a distribution of nanosized superparamagnetic particles of akaganeite was found in the rusts.
Characterization of oxides of stainless steel UNS S30400 formed in offshore environment
Charakterisierung der auf dem nichtrostenden Stahl UNS S30400 unter Offshore-Bedingungen gebildeten Oxiden
Corrosion Science ; 55 ; 34-39
2012
6 Seiten, 6 Bilder, 2 Tabellen, 18 Quellen
Aufsatz (Zeitschrift)
Englisch
nichtrostender Stahl , Dampfturbine , Hochtemperaturkorrosion , Korrosionsprodukt , Mössbauer-Spektrometrie , Oxidationsprodukt , Oberflächenschicht , Oberflächenbeschaffenheit , Röntgenfluoreszenzspektrometrie , energiedispersive Röntgenspektrometrie , Schichtstruktur , chemische Analyse , Konzentrationsverteilung , Eisenverbindung , Superparamagnetismus , Nanoteilchen , Meerestechnik , Chrom-Nickel-Stahl
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