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Wang, X., Herting, G., Wei, Z., Odnevall Wallinder, I. & Hedberg, Y. (2019). Bioaccessibility of nickel and cobalt in powders and massive forms of stainless steel, nickel- or cobalt-based alloys, and nickel and cobalt metals in artificial sweat. Regulatory toxicology and pharmacology, 106, 15-26
Open this publication in new window or tab >>Bioaccessibility of nickel and cobalt in powders and massive forms of stainless steel, nickel- or cobalt-based alloys, and nickel and cobalt metals in artificial sweat
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2019 (English)In: Regulatory toxicology and pharmacology, ISSN 0273-2300, E-ISSN 1096-0295, Vol. 106, p. 15-26Article in journal (Refereed) Published
Abstract [en]

Nickel (Ni)and cobalt (Co)are the most common metal allergens upon skin contact at occupational settings and during consumer handling of metals and alloys. A standardized test (EN, 1811)exists to assess Ni release from articles of metals and alloys in massive forms intended for direct and prolonged skin contact, but no corresponding test exists for other materials such as powders or massive forms of alloys placed on the market or to determine the release of Co, for which only limited data is available. Differences in Ni and Co release from massive forms of a range of common stainless steels and some high-alloyed grades compared to Ni and Co metals were therefore assessed in artificial sweat for 1 week at 30 °C according to EN 1811. A comparable modified test procedure was elaborated and used for powders and some selected massive alloys. All alloys investigated released significantly less amount of Ni (100–5000-fold)and Co (200–400,000-fold)compared with Ni and Co metal, respectively. Almost all alloys showed a lower bioaccessible concentration (0.007–6.8 wt% Ni and 0.00003–0.6 wt% Co)when compared to corresponding bulk alloy contents (0.1–53 wt% Ni, 0.02–65 wt% Co). Observed differences are, among other factors, related to differences in bulk composition and to surface oxide characteristics. For the powders, less Ni and Co were released per surface area, but more per mass, compared to the corresponding massive forms. © 2019 The Authors

Place, publisher, year, edition, pages
Academic Press Inc., 2019
Keywords
Artificial sweat, Classification, Corrosion, EN 1811, Metal release, Particles, Regulation, Skin sensitizer, alloy, cobalt, dermatological agent, nickel, oxide, stainless steel, unclassified drug, Article, calibration, chemical composition, concentration (parameter), particle size, pH, powder, priority journal, surface area, surface property
National Category
Materials Chemistry
Identifiers
urn:nbn:se:kth:diva-252512 (URN)10.1016/j.yrtph.2019.04.017 (DOI)2-s2.0-85064756776 (Scopus ID)
Note

QC 20190710

Available from: 2019-07-10 Created: 2019-07-10 Last updated: 2019-07-10Bibliographically approved
Hedberg, Y., Znidarsic, M., Herting, G., Milosev, I. & Odnevall Wallinder, I. (2019). Mechanistic insight on the combined effect of albumin and hydrogen peroxide on surface oxide composition and extent of metal release from Ti6Al4V. Journal of Biomedical Materials Research - Part B Applied Biomaterials, 107(3), 858-867
Open this publication in new window or tab >>Mechanistic insight on the combined effect of albumin and hydrogen peroxide on surface oxide composition and extent of metal release from Ti6Al4V
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2019 (English)In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, ISSN 1552-4973, Vol. 107, no 3, p. 858-867Article in journal (Refereed) Published
Abstract [en]

The titanium–aluminium (6 wt%)–vanadium (4 wt%) (Ti6Al4V) alloy is widely used as an orthopedic and dental implant material due to its high corrosion resistance in such environments. The corrosion resistance is usually determined by means of electrochemical methods, which may not be able to detect other chemical surface reactions. Literature findings report a synergistic effect of the combination of the abundant protein albumin and hydrogen peroxide (H 2 O 2 ) on the extent of metal release and corrosion of Ti6Al4V. The objectives of this study were to gain further mechanistic insight on the interplay of H 2 O 2 and albumin on the metal release process of Ti6Al4V with special focus on (1) kinetics and (2) H 2 O 2 and albumin concentrations. This was accomplished mainly by metal release and surface oxide composition investigations, which confirmed the combined effect of H 2 O 2 and albumin on the metal release process, although not detectable by electrochemical open circuit potential measurements. A concentration of 30 mM H 2 O 2 induced substantial changes in the surface oxide characteristics, an oxide which became thicker and enriched in aluminum. Bovine serum albumin (BSA) seemed to be able to deplete this aluminum content from the outermost surface or at least to delay its surface enrichment. This effect increased with increased BSA concentration, and for time periods longer than 24 h. This study hence suggests that short-term (accelerated) corrosion resistance measurements are not sufficient to predict potential health effects of Ti6Al4V alloys since also chemical dissolution mechanisms play a large role for metal release, possibly in a synergistic way.

Place, publisher, year, edition, pages
WILEY, 2019
Keywords
implant, XPS, inflammation, complexation, dissolution
National Category
Other Materials Engineering
Identifiers
urn:nbn:se:kth:diva-248329 (URN)10.1002/jbm.b.34182 (DOI)000461683400040 ()30102828 (PubMedID)2-s2.0-85052655822 (Scopus ID)
Note

QC 20190409

Available from: 2019-04-09 Created: 2019-04-09 Last updated: 2019-04-09Bibliographically approved
Leygraf, C., Chang, T., Herting, G. & Odnevall Wallinder, I. (2019). The origin and evolution of copper patina colour. Corrosion Science, 157, 337-346
Open this publication in new window or tab >>The origin and evolution of copper patina colour
2019 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 157, p. 337-346Article in journal (Refereed) Published
Abstract [en]

The copper patina colour has been systematically explored through a large set of short- and long-term exposed copper metal samples. The initial brown-black appearance is attributed to semiconducting properties of cuprite (Cu2O) and fully attained at thickness 0.8 +/- 0.2 mu m. The characteristic green-blue appearance is due to the colour forming Cu(II)-ion in the outer patina layer which needs to be 12 +/- 2 mu m to fully cover the inner cuprite layer. No significant influence of atmospheric environment on patina colour is discerned. The green-blue patina colour on historic copper was attained after shorter exposures than in modem copper due to more inhomogeneous microstructure.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Copper, SEM, XPS, Atmospheric corrosion
National Category
Materials Engineering
Identifiers
urn:nbn:se:kth:diva-257434 (URN)10.1016/j.corsci.2019.05.025 (DOI)000480374200032 ()2-s2.0-85067466175 (Scopus ID)
Note

QC 20190902

Available from: 2019-09-02 Created: 2019-09-02 Last updated: 2019-09-02Bibliographically approved
Chang, T., Herting, G., Goidanich, S., Sánchez Amaya, J. M., Arenas, M. A., Le Bozec, N., . . . Odnevall Wallinder, I. (2019). The role of Sn on the long-term atmospheric corrosion of binary Cu-Sn bronze alloys in architecture. Corrosion Science, 149, 54-67
Open this publication in new window or tab >>The role of Sn on the long-term atmospheric corrosion of binary Cu-Sn bronze alloys in architecture
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2019 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 149, p. 54-67Article in journal (Refereed) Published
Abstract [en]

The role of Sn on the atmospheric corrosion performance of binary Cu-Sn bronze alloys (4–6 wt.% Sn) compared with Cu metal used in outdoor architecture is elucidated in terms of microstructure, native surface oxide composition, patina evolution, corrosion rates, appearance and metal release. Results are presented for non-exposed surfaces and surfaces exposed at different urban and marine sites in Europe up to 5 years and based on multi-analytical findings from microscopic, spectroscopic, electrochemical and chemical investigations. Alloying influenced the corrosion, aesthetic appearance and patina evolution, differently for urban and marine sites, whereas no effects were observed on the release pattern.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Aesthetic appearance, Atmospheric corrosion, Bronze, Metal release, Patina
National Category
Metallurgy and Metallic Materials
Identifiers
urn:nbn:se:kth:diva-246467 (URN)10.1016/j.corsci.2019.01.002 (DOI)000459839700006 ()2-s2.0-85059532533 (Scopus ID)
Note

QC 20190328

Available from: 2019-03-28 Created: 2019-03-28 Last updated: 2019-03-28Bibliographically approved
Chang, T., Herting, G., Goidanich, S., Sanchez Amaya, J. M., Arenas, M. A., Le Bozec, N., . . . Odnevall Wallinder, I. (2019). The role of Sn on the long-term atmospheric corrosion of binary Cu-Sn bronze alloys in architecture. Corrosion Science, 149, 54-67
Open this publication in new window or tab >>The role of Sn on the long-term atmospheric corrosion of binary Cu-Sn bronze alloys in architecture
Show others...
2019 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 149, p. 54-67Article in journal (Refereed) Published
Abstract [en]

The role of Sn on the atmospheric corrosion performance of binary Cu-Sn bronze alloys (4-6 wt.% Sn) compared with Cu metal used in outdoor architecture is elucidated in terms of microstructure, native surface oxide composition, patina evolution, corrosion rates, appearance and metal release. Results are presented for non-exposed surfaces and surfaces exposed at different urban and marine sites in Europe up to 5 years and based on multi-analytical findings from microscopic, spectroscopic, electrochemical and chemical investigations. Alloying influenced the corrosion, aesthetic appearance and patina evolution, differently for urban and marine sites, whereas no effects were observed on the release pattern.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2019
Keywords
Bronze, Atmospheric corrosion, Patina, Metal release, Aesthetic appearance, SLOUIS C, 1993, ELECTROCHIMICA ACTA, V38, P2781 yer H.E., 1985, yer J.H., 1992, Bronze Corrosion: Rates and Chemical Processes, the Conservation of Bronze Sculpture in the Outdoor Environment: a Dialogue Among Conservators, Curators, Environmental Scientists, and Corrosion Engineers, P103 hweizer F., 1994, Bronze Objects From Lake Sites: From Patina to Biography, Ancient and Historic Metals: Conservation and Scientific Research, P33 nonymous], ISO 9226, armaraj N, 2006, SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, V64, P136 W., 2001, Water Air Soil Pollut. Focus, V1, P67 ott DA, 2000, STUDIES IN CONSERVATION, V45, P39 otkova D., 1996, Proc. of Art' 96
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-246227 (URN)10.1016/j.corsci.2019.01.002 (DOI)000459839700006 ()2-s2.0-85059532533 (Scopus ID)
Note

QC 20190404

Available from: 2019-04-04 Created: 2019-04-04 Last updated: 2019-04-04Bibliographically approved
Herting, G., Karlsson, M.-E. & Odnevall Wallinder, I. (2018). A novel method to assess mass loss of aluminium in concrete. Materials and corrosion - Werkstoffe und Korrosion, 69(12), 1811-1814
Open this publication in new window or tab >>A novel method to assess mass loss of aluminium in concrete
2018 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 69, no 12, p. 1811-1814Article in journal (Refereed) Published
Abstract [en]

A novel pickling procedure for aluminium is elaborated for successful removal of corrosion products on aluminium embedded and exposed in concrete, allowing subsequent mass loss evaluation. The current recommended standard procedures for mass loss evaluation of aluminium are not sufficiently effective, either leaving significant amounts of concrete and corrosion products on the aluminium surfaces after pickling, or containing hazardous chemicals. Removal of both concrete and corrosion products from the aluminium surfaces require a stepwise combination of an aqueous glycine solution, nitric acid at elevated temperature and careful manual removal of adherent concrete.

Place, publisher, year, edition, pages
John Wiley & Sons, 2018
Keywords
Aluminum; Glycine; Mass loss; Nitric acid; Pickling
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-233204 (URN)10.1002/maco.201810248 (DOI)000452197200011 ()2-s2.0-85050597754 (Scopus ID)
Note

QC 20180828

Available from: 2018-08-14 Created: 2018-08-14 Last updated: 2019-09-18Bibliographically approved
Hedberg, Y., Herting, G., Latvala, S., Elihn, K., Karlsson, H. L. & Odnevall Wallinder, I. (2016). Surface passivity largely governs the bioaccessibility of nickel-based powder particles at human exposure conditions. Regulatory toxicology and pharmacology, 81, 162-170
Open this publication in new window or tab >>Surface passivity largely governs the bioaccessibility of nickel-based powder particles at human exposure conditions
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2016 (English)In: Regulatory toxicology and pharmacology, ISSN 0273-2300, E-ISSN 1096-0295, Vol. 81, p. 162-170Article in journal (Refereed) Published
Abstract [en]

The European chemical framework REACH requires that hazards and risks posed by chemicals, including alloys and metals, are identified and proven safe for humans and the environment. Therefore, differences in bioaccessibility in terms of released metals in synthetic biological fluids (different pH (1.5–7.4) and composition) that are relevant for different human exposure routes (inhalation, ingestion, and dermal contact) have been assessed for powder particles of an alloy containing high levels of nickel (Inconel 718, 57 wt% nickel). This powder is compared with the bioaccessibility of two nickel-containing stainless steel powders (AISI 316L, 10–12% nickel) and with powders representing their main pure alloy constituents: two nickel metal powders (100% nickel), two iron metal powders and two chromium metal powders. X-ray photoelectron spectroscopy, microscopy, light scattering, and nitrogen absorption were employed for the particle and surface oxide characterization. Atomic absorption spectroscopy was used to quantify released amounts of metals in solution. Cytotoxicity (Alamar blue assay) and DNA damage (comet assay) of the Inconel powder were assessed following exposure of the human lung cell line A549, as well as its ability to generate reactive oxygen species (DCFH-DA assay). Despite its high nickel content, the Inconel alloy powder did not release any significant amounts of metals and did not induce any toxic response. It is concluded, that this is related to the high surface passivity of the Inconel powder governed by its chromium-rich surface oxide. Read-across from the pure metal constituents is hence not recommended either for this or any other passive alloy.

Place, publisher, year, edition, pages
Academic Press, 2016
Keywords
Alloy, Bioaccessibility, Inconel, Nickel, Toxicity
National Category
Pharmacology and Toxicology
Identifiers
urn:nbn:se:kth:diva-195212 (URN)10.1016/j.yrtph.2016.08.013 (DOI)000389865600019 ()2-s2.0-84984813653 (Scopus ID)
Note

QC 21061118

Available from: 2016-11-18 Created: 2016-11-02 Last updated: 2018-01-13Bibliographically approved
Wang, X., Herting, G., Odnevall Wallinder, I. & Blomberg, E. (2015). Adsorption of bovine serum albumin on silver surfaces enhances the release of silver at pH neutral conditions. Physical Chemistry, Chemical Physics - PCCP, 17(28), 18524-34
Open this publication in new window or tab >>Adsorption of bovine serum albumin on silver surfaces enhances the release of silver at pH neutral conditions
2015 (English)In: Physical Chemistry, Chemical Physics - PCCP, ISSN 1463-9076, E-ISSN 1463-9084, Vol. 17, no 28, p. 18524-34Article in journal (Refereed) Published
Abstract [en]

Metallic biomaterials are widely used to replace and/or restore the function of damaged bodily parts. The use of silver as antibacterial coatings onto implants has recently gained large interest in medical applications. The extent of silver that can be released into different biological fluids from such coatings is, except for the surface characteristics of the coating, governed by parameters such as protein characteristics, adsorbed layer properties, formation of silver-protein complexes as well as concentrations of proteins in the solution. This study aims to relate the structure of adsorbed net negatively charged bovine serum albumin (BSA), which is the most abundant protein in serum, to the release of silver from metallic silver surfaces in order to elucidate if the net charge of the protein has any effect of the silver release. Simultaneous adsorption measurements were performed in real time on the very same surface using combined ellipsometry and quartz crystal microbalance with dissipation monitoring (QCM-D) measurements to provide a more comprehensive understanding on adsorption kinetics and layer structures. The amount of released silver into solution was measured by means of graphite furnace atomic absorption spectroscopy (GF-AAS). The structure of the adsorbed BSA layer largely influenced the amount of released silver, an enhancement that increased with BSA concentration. These observations are in complete contrast to the effect of net positively charged lysozyme (LSZ) adsorbed on silver, previously studied by the authors, for which a complete surface coverage suppressed the possibility for silver release. The underlying mechanisms behind the enhanced release of silver in the presence of BSA were mainly attributed to surface complexation between BSA and silver followed by an enhanced exchange rate of these surface complexes with BSA molecules in the solution, which in turn increase the amount of released silver in solution.

Place, publisher, year, edition, pages
RSC Publishing, 2015
National Category
Chemical Sciences
Identifiers
urn:nbn:se:kth:diva-171106 (URN)10.1039/c5cp02306h (DOI)000357808500034 ()26111372 (PubMedID)2-s2.0-84936984549 (Scopus ID)
Funder
Swedish Research Council
Note

QC 20150720

Available from: 2015-07-20 Created: 2015-07-20 Last updated: 2017-12-04Bibliographically approved
Hedberg, Y. S., Goidanich, S., Herting, G. & Odnevall Wallinder, I. (2015). Surface rain interactions: Differences in copper runoff for copper sheet of different inclination, orientation, and atmospheric exposure conditions. Environmental Pollution, 196, 363-370
Open this publication in new window or tab >>Surface rain interactions: Differences in copper runoff for copper sheet of different inclination, orientation, and atmospheric exposure conditions
2015 (English)In: Environmental Pollution, ISSN 0269-7491, E-ISSN 1873-6424, Vol. 196, p. 363-370Article in journal (Refereed) Published
Abstract [en]

Predictions of the diffuse dispersion of metals from outdoor constructions such as roofs and facades are necessary for environmental risk assessment and management. An existing predictive model has been compared with measured data of copper runoff from copper sheets exposed at four different inclinations facing four orientations at two different urban sites (Stockholm, Sweden, and Milan, Italy) during a 4-year period. Its applicability has also been investigated for copper sheet exposed at two marine sites (Cadiz, Spain, for 5 years, and Brest, France, for 9 years). Generally the model can be used for all given conditions. However, vertical surfaces should be considered as surfaces inclined 60-80 degrees due to wind-driven effects. The most important parameters that influence copper runoff, and not already included in the model, are the wind and rain characteristics that influence the actual rainfall volume impinging the surface of interest. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

Keywords
Copper, Runoff, Corrosion, Roof, Facade
National Category
Corrosion Engineering
Identifiers
urn:nbn:se:kth:diva-160400 (URN)10.1016/j.envpol.2014.11.003 (DOI)000347583900044 ()
Note

QC 20150225

Available from: 2015-02-25 Created: 2015-02-19 Last updated: 2017-12-04Bibliographically approved
Wang, X., Herting, G., Odnevall Wallinder, I. & Blomberg, E. (2014). Adsorption of Lysozyme on Silver and Its Influence on Silver Release. Langmuir, 30(46), 13877-13889
Open this publication in new window or tab >>Adsorption of Lysozyme on Silver and Its Influence on Silver Release
2014 (English)In: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 30, no 46, p. 13877-13889Article in journal (Refereed) Published
Abstract [en]

Silver is increasingly used in antimicrobial coatings of biomedical devices and implants to hinder infections. As proteins have been shown to largely influence the extent of released metals from various metal surfaces at biological conditions, silver may also be influenced in the same way. The aim of this study is to relate the structure of adsorbed lysozyme (LSZ) to the release of silver from metallic silver surfaces. Simultaneous adsorption measurements were performed in real time on the same surface using combined ellipsometry and quartz crystal microbalance with dissipation monitoring measurements to provide a more comprehensive understanding on the adsorption kinetics and the layer structures. The concentration of LSZ in 0.15 M NaNO3 solution (pH 7, 25 degrees C) influences the structure of the adsorbed layer. Monolayer coverage is obtained at concentrations =0.1 g/L, while a bilayer structure with a rigid inner layer and a relatively loosely adsorbed outer layer is formed at 1 g/L. The inner layer of LSZ is assumed to bind firmly to silver via disulfide bridges, which makes it irreversibly adsorbed with respect to dilution. The amount of released silver is further influenced by the structure of the LSZ layer. At low LSZ concentrations (=0.1 g/L) the amount of released silver is not significantly different compared with non-protein-containing NaNO3 solutions; however, noticeable reduction was observed at higher concentrations (1 g/L). This reduction in silver release has several possible explanations, including (i) surface complexation between LSZ and silver ions that may result in the incorporation of silver in the irreversible adsorbed layer and, hence, reduce the amount of released silver into solution, and (ii) net charge reversal at the protein/solution interface to slightly positive surface potentials. Any release of silver will therefore exhibit an electrostatic repulsion during transportation through the protein layer results in a reduced amount of silver in solution.

Keywords
Adsorption, Covalent bonds, Crystallography, Enzymes, Metal ions, Quartz, Adsorption kinetics, Adsorption measurement, Antimicrobial coatings, Biological conditions, Biomedical devices, Electrostatic repulsion, Quartz crystal microbalance with dissipation monitoring, Surface complexation
National Category
Chemical Sciences Materials Engineering
Identifiers
urn:nbn:se:kth:diva-158285 (URN)10.1021/la503170x (DOI)000345552000020 ()25363360 (PubMedID)2-s2.0-84912573332 (Scopus ID)
Funder
Swedish Research Council
Note

QC 20150109

Available from: 2015-01-09 Created: 2015-01-07 Last updated: 2017-12-05Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-2123-2201

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