Corrosion-induced release of the main alloying constituents of manganese-chromium stainless steels in different media
2008 (English)In: Journal of Environmental Monitoring, ISSN 1464-0325, E-ISSN 1464-0333, Vol. 10, no 9, 1084-1091 p.Article in journal (Refereed) Published
The main focus of this paper is the assessment of release rates of chromium, nickel, iron and manganese from manganese-chromium stainless steel grades of low nickel content. The manganese content varied between 9.7 and 1.5 wt% and the corresponding nickel content between 1 and 5 wt%. All grades were exposed to artificial rain and two were immersed in a synthetic body fluid of similar pH but of different composition and exposure conditions. Surface compositional studies were performed using X-ray photoelectron spectroscopy (XPS) in parallel to correlate the metal release process with changes in surface oxide properties.
All grades, independent of media, revealed a time-dependent metal release process with a preferential low release of iron and manganese compared to nickel and chromium while the chromium content of the surface oxide increased slightly. Manganese was detected in the surface oxide of all grades, except the grade of the lowest manganese bulk content. No nickel was observed in the outermost surface oxide. Stainless steel grades of the lowest chromium content (approximate to 16 wt%) and highest manganese content (approximate to 7-9 wt%), released the highest quantity of alloy constituents in total, and vice versa. No correlation was observed between the release rate of manganese and the alloy composition. Released main alloy constituents were neither proportional to the bulk alloy composition nor to the surface oxide composition.
Place, publisher, year, edition, pages
2008. Vol. 10, no 9, 1084-1091 p.
NICKEL; METALS; PITS
IdentifiersURN: urn:nbn:se:kth:diva-8529DOI: 10.1039/b805058aISI: 000258737700010ScopusID: 2-s2.0-50949108910OAI: oai:DiVA.org:kth-8529DiVA: diva2:13877
QC 20100810. Uppdaterad från submitted till published (20100810).2008-05-272008-05-272010-08-10Bibliographically approved