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Metal release of stainless steel particles in artificial lung fluid: complexation and synergistic effects
KTH, School of Chemical Science and Engineering (CHE).
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Frigörelse av metaller från partiklar av rostfritt stål i artificiell lungvätska: komplexering och synergieffekter (Swedish)
Abstract [en]

Numerous metal release data have been published by the Div. Surface and Corrosion Science and the AISI 316L stainless steel particles’ behavior in artificial lysosomal fluid (ALF). This study aims to evaluate the effect of chemical components in ALF on metal release from stainless steel particles with a bottom-up methodology. Two sizes of 316L stainless steel particles were used to assess the particle size influence on the metal release in detail.

The results show that organic complexing agents e.g. lactate, tartrate and citrate are responsible for the high metal release rate in ALF. Correlations between the metal release rate and the number of carboxyl groups of the organic ligand were observed. Moreover, metal release data in this study indicates no synergistic effects in ALF solution, and continued research is on-going to study the synergistic effects further. No quantitative rules of iron, chromium and nickel release from the same stainless particles could be found which may indicate that these metals are released through different pathways e.g. diffusion or chemical dissolution. In different solutions with different chemical components, one or more metal release mechanisms dominate over others and make the metal release rate unpredictable.

Place, publisher, year, edition, pages
2011. , 38 p.
Keyword [en]
metal release, stainless steel, complexation, artificial lung fluid
National Category
Other Chemistry Topics
Identifiers
URN: urn:nbn:se:kth:diva-33047OAI: oai:DiVA.org:kth-33047DiVA: diva2:413124
Subject / course
Physical Chemistry
Educational program
Degree of Master
Uppsok
Physics, Chemistry, Mathematics
Supervisors
Examiners
Available from: 2011-04-27 Created: 2011-04-27 Last updated: 2011-05-27

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