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Publications (10 of 14) Show all publications
Zavalis, T., Ström, M., Persson, D., Wendel, E., Ahlström, J., Törne, K., . . . Tidblad, J. (2023). Mechanistic Model with Empirical Pitting Onset Approach for Detailed and Efficient Virtual Analysis of Atmospheric Bimetallic Corrosion. Materials, 16(3), Article ID 923.
Open this publication in new window or tab >>Mechanistic Model with Empirical Pitting Onset Approach for Detailed and Efficient Virtual Analysis of Atmospheric Bimetallic Corrosion
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2023 (English)In: Materials, E-ISSN 1996-1944, Vol. 16, no 3, article id 923Article in journal (Refereed) Published
Abstract [en]

A mechanistic model of atmospheric bimetallic corrosion with a simplified empirical approach to the onset of localized corrosion attacks is presented. The model was built for a typical bimetallic sample containing aluminum alloy 1050 and stainless steel 316L sheets. A strategy was developed that allowed the model to be calibrated against the measured galvanic current, geometrical corrosion attack properties, and corrosion products. The pitting-onset simplification sets all pits to be formed at a position near the nobler metal and treated all pits as being of the same shape and size. The position was based on the location of the highest pitting events and the pit attributes on an average of the deepest pits. For 5 h exposure at controlled RH (85%, 91%, and 97%) and salt load (86 μg NaCl/cm2), the model was shown to be promising: both for analysis of local bimetallic corrosion chemistry, such as pH and corrosion products, and for efficient assessment of pitting damage by computing a single largest pit depth. Parametric studies indicated that the pitting-onset approximation deviated the most at the beginning of exposure and when RH was below 91%. © 2023 by the authors.

Place, publisher, year, edition, pages
MDPI, 2023
Keywords
AA 1050, aluminum, bimetallic corrosion, galvanic corrosion, lightweight, modeling, pitting, simulation, stainless steel, Aluminum alloys, Aluminum corrosion, Atmospheric chemistry, Atmospheric corrosion, Damage detection, Sodium chloride, Steel corrosion, Corrosion attack, Corrosion products, Mechanistic models, Pittings
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-64101 (URN)10.3390/ma16030923 (DOI)2-s2.0-85147850777 (Scopus ID)
Note

Correspondence Address: Zavalis Tommy, RISE Research Institutes of Sweden, Sweden; email: tommy.zavalis@ri.se; Funding details: VINNOVA, 2018-0288; Funding text 1: This work was funded by LIGHTer, a strategic innovation program within the Swedish innovation agency (VINNOVA) grant number 2018-0288.

Available from: 2023-02-28 Created: 2023-02-28 Last updated: 2024-04-04Bibliographically approved
Taxén, C., Moya Nunez, A. & Lilja, C. (2023). Stress corrosion of copper in sulfide solutions: Variations in pH-buffer, strain rate, and temperature. Materials and corrosion - Werkstoffe und Korrosion
Open this publication in new window or tab >>Stress corrosion of copper in sulfide solutions: Variations in pH-buffer, strain rate, and temperature
2023 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176Article in journal (Refereed) Epub ahead of print
Abstract [en]

Copper is the intended canister material for the disposal of spent nuclear fuel in Sweden. At repository depth the groundwater may contain dissolved sulfide. The main goal for this work is to study the tendency for stress corrosion of copper in sulfide solutions and examine the influence of various experimental parameters on stress corrosion. Slow strain rate testing was performed on copper test rods in solutions with 1.0 mM sulfide. The pH was kept near neutral with phosphate or borate buffer. The test matrix included variations in temperature, strain rate, and duration of the tests as well as salt and buffer concentrations. Cross-sections of the specimens after testing were investigated using scanning electron microscope/energy dispersive X-ray spectroscopy detector. Stress–strain curves do not reveal any signs of stress corrosion. However, intergranular corrosion in the shape of crack and pit-like features developed in all tests with 1.0 mM sulfide. The length of the deepest features in all these tests was of the same order of magnitude (10–20 µm). The suggested mechanism proposes that crack-like features originate at the surface of the copper metal from the oxidation of grain boundaries that behave as slightly less noble. © 2023 The Authors. 

Place, publisher, year, edition, pages
John Wiley and Sons Inc, 2023
Keywords
copper, corrosion, inter granular, SSRT, stress, sulfide, Copper compounds, Copper corrosion, Grain boundaries, Groundwater, Intergranular corrosion, Residual stresses, Scanning electron microscopy, Stress corrosion cracking, Sulfur compounds, Textures, X ray detectors, X ray spectroscopy, Canister materials, Dissolved sulfide, pH buffers, Spent nuclear fuels, Strain-rates, Strain-temperature, Stress-corrosion, Sulphide, Strain rate
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-64343 (URN)10.1002/maco.202313759 (DOI)2-s2.0-85150981810 (Scopus ID)
Note

This work was commissioned by SKB, Swedish NuclearFuel and Waste Management Co.

Available from: 2023-04-21 Created: 2023-04-21 Last updated: 2023-12-04Bibliographically approved
Prosek, T., Hagström, J., Persson, D., Fuertes, N., Lindberg, F., Chocholatý, O., . . . Thierry, D. (2016). Effect of the microstructure of Zn-Al and Zn-Al-Mg model alloys on corrosion stability. Corrosion Science, 110, 71-81
Open this publication in new window or tab >>Effect of the microstructure of Zn-Al and Zn-Al-Mg model alloys on corrosion stability
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2016 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 110, p. 71-81Article in journal (Refereed) Published
Abstract [en]

Zn-5Al and Zn-3Al-2Mg model alloys were cast and heat treated in order to obtain specimens with distinct microstructures and identical chemical compositions. The microstructure was characterised in detail to identify composition, size and distribution of present phases. Mass losses of samples with different microstructures and identical chemical compositions that were subjected to a cyclic corrosion test and a test under non-rinsing conditions differed by a factor of up to two. The mechanism is discussed based on measurements of corrosion stability of individual phases and chemical and phase compositions of corrosion products.

Place, publisher, year, edition, pages
Elsevier Ltd, 2016
Keywords
A. Metal coatings, A. Zinc, B. Polarisation, B. SEM, B. Weight loss, C. Atmospheric corrosion, Atmospheric corrosion, Chemical stability, Corrosion, Magnesium, Microstructure, Zinc, Zinc alloys, Zinc coatings, Chemical and phase compositions, Chemical compositions, Corrosion products, Corrosion stability, Cyclic corrosion tests, Effect of the microstructures, Measurements of, Weight loss, Aluminum
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-40027 (URN)10.1016/j.corsci.2016.04.022 (DOI)2-s2.0-84992297965 (Scopus ID)
Available from: 2019-10-09 Created: 2019-10-09 Last updated: 2023-11-01Bibliographically approved
Comanescu, I., Melchers, R. E. & Taxén, C. (2015). Corrosion and durability of offshore steel water injection pipelines (ed.). Ships and Offshore Structures, 11(4), 424-437
Open this publication in new window or tab >>Corrosion and durability of offshore steel water injection pipelines
2015 (English)In: Ships and Offshore Structures, ISSN 1744-5302, E-ISSN 1754-212X, Vol. 11, no 4, p. 424-437Article in journal (Refereed) Published
Abstract [en]

Carbon steel pipelines are widely used for injection of sea and other waters into oil and gas wells so as to increase the rate of recovery, particularly from mature fields. Internal corrosion usually is mild. However, cases of very aggressive channelling corrosion along the bottom of the pipeline have been observed. Practical experience and anecdotal observations have attributed this to microbiologically influenced corrosion even though extensive use is made of preventative measures including biocides, oxygen scavengers, corrosion and scale inhibitors, and pipeline pigging. Interpretation of data and observations for five water injection pipelines, made available by industry, indicate that microbiologically influenced corrosion may play a part in causing channelling corrosion but that the most likely cause is under-deposit corrosion under pipe debris that settles during periods of pipeline shut-downs and low water velocity.

Keywords
durability, microbiologically influenced corrosion, pipelines, steel, under-deposit corrosion, water injection
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12772 (URN)10.1080/17445302.2015.1014249 (DOI)2-s2.0-84923542079 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
Prosek, T., Thierry, D., Hagström, J., Persson, D., Fuertes, N., Lindberg, F., . . . Serak, J. (2015). Relationship between corrosion performance and microstructure of Zn-AI and Zn-AI-Mg model alloys. In: European Corrosion Congress, EUROCORR 2015: . Paper presented at European Corrosion Congress, EUROCORR 2015, 6 September 2015 through 10 September 2015 (pp. 511-522). Austrian Society for Metallurgy and Materials (ASMET)
Open this publication in new window or tab >>Relationship between corrosion performance and microstructure of Zn-AI and Zn-AI-Mg model alloys
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2015 (English)In: European Corrosion Congress, EUROCORR 2015, Austrian Society for Metallurgy and Materials (ASMET) , 2015, p. 511-522Conference paper, Published paper (Refereed)
Abstract [en]

Zn-5wt.%AI and Zn-3wt.%AI-2wt.%Mg model alloys were cast and heat treated in order to obtain specimens with distinct microstructure and identical chemical composition. The microstructure was characterized in detail using scanning electron microscopy (SEM), energy-dispersive x-ray spectroscopy (EDX) and x-ray diffraction spectroscopy (XRD) to identify chemical composition, size and distribution of present phases. Mass loss of samples with different microstructure and identical chemical composition subjected to a cyclic corrosion test and a test under non-rinsing conditions differed by a factor of up to two. Some model alloys showed better corrosion performance compared to commercial coatings with similar composition tested in parallel. This indicates that microstructure modification can improve the corrosion performance of industrial zinc alloy coatings. The mechanism is discussed based on measurements of corrosion stability of individual phases, preferential corrosion, composition and stability of corrosion products, dc electrochemical characteristics and infrared absorption spectroscopy (IRRAS) experiments.

Place, publisher, year, edition, pages
Austrian Society for Metallurgy and Materials (ASMET), 2015
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-40393 (URN)2-s2.0-85025611067 (Scopus ID)9781510837379 (ISBN)
Conference
European Corrosion Congress, EUROCORR 2015, 6 September 2015 through 10 September 2015
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2023-11-01Bibliographically approved
Comanescu, I. & Taxén, C. (2013). The possible influence of microorganisms on the patterns of corrosion seen in water injection pipelines (ed.). In: : . Paper presented at Corrosion 2013, Orlando, FL, 17 March 2013 through 21 March 2013.
Open this publication in new window or tab >>The possible influence of microorganisms on the patterns of corrosion seen in water injection pipelines
2013 (English)Conference paper, Published paper (Refereed)
Abstract [en]

A major problem for the management of oil and gas pipelines is corrosion influenced by microorganisms particularly, bacteria. The present study focuses on the influence particularly of the sulfate reducing bacteria on the internal corrosion of water injection pipelines. The research is based on reports from long-term observations of several water injections pipelines from the North Sea continental shelf. Observation data taken into consideration are pigging operation information, composition of corrosion products and their amount, corrosion rates and pipe geometry, identified biological consortia, water chemistry and process parameters. Observations regarding water quality and mitigation methods are made also. The distribution of corrosion including pitting and 'features' along the pipeline as well as the localization of these in relation to the orientation of the surfaces, is considered. This includes different corrosion patterns along the pipeline and the relative severity of six o'clock corrosion. These observations are used to make correlation estimates between severity and location of corrosion and service history and the local environmental conditions, where this information is available. The correlations are used to develop a clearer view of the proportion of biocorrosion contributing to the total corrosion in water injection pipelines. Additionally, an assessment is made of the efficiency of mitigation procedures such as biocide treatments and pigging operations. The paper provides possible explanations for different rates and spatial patterns of corrosion for water injection pipelines. © 2013 by NACE International.

Series
NACE - International Corrosion Conference Series, ISSN 0361-4409
Keywords
Biocorrosion, Hydrogen sulfide, Sulfate reducing bacteria, Water injection pipelines (wips)
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12925 (URN)9781627481458 (ISBN)
Conference
Corrosion 2013, Orlando, FL, 17 March 2013 through 21 March 2013
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
Comanescu, I. & Taxén, C. (2012). Assessment of MIC in carbon steel water injection pipelines (ed.). In: Society of Petroleum Engineers - SPE International Conference and Exhibition on Oilfield Corrosion 2012: . Paper presented at SPE International Conference and Exhibition on Oilfield Corrosion 2012, Aberdeen, 28 May 2012 through 29 May 2012, 92248 (pp. 227-234).
Open this publication in new window or tab >>Assessment of MIC in carbon steel water injection pipelines
2012 (English)In: Society of Petroleum Engineers - SPE International Conference and Exhibition on Oilfield Corrosion 2012, 2012, p. 227-234Conference paper, Published paper (Refereed)
Abstract [en]

The present study compares corrosion mass loss and pit depth measurements on carbon steel corrosion coupons exposed under similar operating parameters, but with different biological consortia. One set of data were obtained from standard flush disc corrosion coupons used to monitor corrosion rates in a water injection pipeline on the North Sea continental shelf. The coupons were exposed on average for 6 months over 6 years operational time. These data are compared with published corrosion data of coupons exposed in abiotic district hot water systems from several power plants situated in Europe. The exposure time for these coupons was 9 months. Both systems were anoxic and in the same temperature range and are comparable. Observations regarding relationship between MIC and bacterial consortia, bacterial numbers and type, water quality and corrosion products are also made. The corrosion rate of the water injection pipeline is approximately 10 times higher compared with the corrosion rate in the abiotic district hot water system. It is concluded that the increased corrosion on the carbon steel coupons in the early stage is caused by MIC. This is also supported by the chemical and biological information available for the pipelines. The results reported here constitute the first step of an overall study to improve the level of understanding of the bacterial contribution to the total corrosion rates of carbon steel in water injection flowlines. Such understanding is expected to improve management and operational decision-making for practical control of corrosion in the field, by providing predictions of expected life time as a function of control of biotic consortia (e.g. through pigging, and biocide treatments). Further, it will facilitate decisions concerning choice of pipeline construction materials for future design. Copyright 2012, Society of Petroleum Engineers.

National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12945 (URN)9781622760800 (ISBN)
Conference
SPE International Conference and Exhibition on Oilfield Corrosion 2012, Aberdeen, 28 May 2012 through 29 May 2012, 92248
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
Ha, H., Taxén, C., Cong, H. & Scully, J. (2012). Effect of applied potential on Pit propagation in copper as function of water chemistry (ed.). Journal of the Electrochemical Society, 159(2), C59-C73
Open this publication in new window or tab >>Effect of applied potential on Pit propagation in copper as function of water chemistry
2012 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 159, no 2, p. C59-C73Article in journal (Refereed) Published
Abstract [en]

The effect of potential on pit propagation as a function of water chemistry was investigated using artificial pit electrodes. In both 0.01 M HCO 3 - 0.01 M SO 4 2- and 0.01 M HCO 3 - 0.01 M Cl - solutions, pits grew faster at higher applied potentials. However the magnitude of the pitting rate depends on the solution chemistry. A higher pitting rate was observed during pit growth in 0.01 M HCO 3 - 0.01 M SO 4 2- solution compared to 0.01 M HCO 3 - 0.01 M Cl - solution. The chemistry of the water determined the morphology and the molecular identity of corrosion products deposited inside and outside of the pits. Thick and porous layers of malachite and brochantiteposnjakite covered pits in 0.01 M HCO 3 - 0.01 M SO 4 2- solution. In contrast, thin and compact layers of malachite, cuprite and atacamitenantokiteeriochantite covered pits in 0.01 M HCO 3 - 0.01 M Cl - solution. Modeling successfully predicted these corrosion products. Applied potential determined the amount, the structure and the distribution of corrosion products in both experiment and model. However, the effect of potential was more pronounced in 0.01 M HCO 3 - 0.01 M SO 4 2- solution in comparison to 0.01 M HCO 3 - 0.01 M Cl - solution. © 2011 The Electrochemical Society.

National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12844 (URN)10.1149/2.010202jes (DOI)2-s2.0-84855323191 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
Comanescu, I., Melchers, R. E. & Taxén, C. (2012). Life time assessment of offshore water injection pipelines as a function of microbiologically influenced corrosion (ed.). In: : . Paper presented at 22nd International Offshore and Polar Engineering Conference, ISOPE-2012, Rhodes, 17 June 2012 through 22 June 2012, 92532 (pp. 252-258).
Open this publication in new window or tab >>Life time assessment of offshore water injection pipelines as a function of microbiologically influenced corrosion
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Corrosion of water injection pipelines (WIP) in the oil and gas industry is a major issue involving potential premature life time predictions and unpredicted costs like periodic biocide treatment and pipeline pigging. This paper presents a part of a larger project concerned with improving understanding of the influence of bacterial activity on corrosion, as distinct from abiotic corrosion, in oil and gas transport systems for better management of pipeline systems. Observations are made concerning life time as a function of microbiologically influenced corrosion (MIC) risk and relationships between MIC, bacterial numbers and types, and water quality.

Series
Proceedings of the International Offshore and Polar Engineering Conference, ISSN 1098-6189
Keywords
Biocorrosion, Lifetime, Microbiologically influenced corrosion, Risk assessment, Water injection pipelines
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12944 (URN)2-s2.0-84866077088 (Scopus ID)9781880653944 (ISBN)
Conference
22nd International Offshore and Polar Engineering Conference, ISOPE-2012, Rhodes, 17 June 2012 through 22 June 2012, 92532
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
Taxén, C., Letelier, M. & Lagos, G. (2012). Model for estimation of copper release to drinking water from copper pipes (ed.). Corrosion Science, 58, 267-277
Open this publication in new window or tab >>Model for estimation of copper release to drinking water from copper pipes
2012 (English)In: Corrosion Science, ISSN 0010-938X, E-ISSN 1879-0496, Vol. 58, p. 267-277Article in journal (Refereed) Published
Abstract [en]

Modelling and prediction of the copper concentration released from copper plumbing tubes due to corrosion, dissolution, precipitation and other processes has not previously been successful. The model presented here is based on a set of dissolution and precipitation reactions, equilibrium between species in solution and solids, mass balance, kinetic expressions, adsorption isotherms, and surface area coverage by precipitates.The model developed has created two major outputs: first; it is the most conclusive collection of mechanistic considerations to date; and second; reasonable correlations between the model and actual data have been obtained for a broad range of waters. © 2012 Elsevier Ltd.

Keywords
A. Copper, B. modelling studies, C. Amorphous structures, C. Oxidation, C. Oxygen reduction
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-12837 (URN)10.1016/j.corsci.2012.02.005 (DOI)2-s2.0-84858625044 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2023-11-01Bibliographically approved
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Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1577-6704

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