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Theelen, M. (author), Broos, R.J.P. (author), Hovestad, A. (author)The degradation mechanisms of the molybdenum (Mo) back contact for Cu(In,Ga)Se2 solar cells in the presence of atmospheric species have been investigated. Mo/MoSe2 films on glass were immersed in water purged with the gases oxygen (O2), nitrogen (N2), carbon dioxide (CO2), air, in non-purged water, and exposed to air. It was found that the...article 2022
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Zhang, X. (author), Noel-Hermes, N. (author), Ferrari, G. (author), Hoogeland, M.G. (author)Corrosion of mooring chains is regarded as one of main threats to the offshore mooring systems. Localized corrosion is even more dangerous than uniform corrosion because it may not show significant mass loss but it can cause stress concentration and initiate cracks under force, leading to accelerated degradation of mooring chains. Localized...article 2022
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Fayezioghani, A. (author), Dekker, R. (author), Sluys, L.J. (author)Structural components in corrosive environments such as pipelines, bridges, aircrafts, and turbines are imposed to stress corrosion. A stress corrosion model for pit growth should a) accurately consider the electrochemistry of the corrosion process, b) properly deal with the moving interface between solid and electrolyte, and c) effectively...article 2022
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Shoeibi Omrani, P.S. (author), Egberts, P.J.P. (author), Octaviano, R. (author)This paper presents the design and implementation of a geothermal doublet digital twin which allows for several functionalities in real time: - Monitoring of doublet performance and emission - Monitoring critical processes in the production such as corrosion, erosion and scaling - Detection of events and anomalies in the production - Process...conference paper 2022
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Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author)A numerical model for corrosion pit propagation under mechanical loading is presented. The level set method is used for corrosion front tracking and also enables the domain to be split into a solid and a pit domain. In the pit the diffusion of atoms originating from the dissolution process occurring at the pit front is simulated. The model is...article 2021
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- Dekker, R. (author), van der Meer, F.P. (author), Maljaars, J. (author), Sluys, L.J. (author) article 2021
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Rossi, E. (author), Zhang, H. (author), Garcia, S.J. (author), Bijleveld, J. (author), Nijland, T.G. (author), Copuroglu, O. (author), Polder, R.B. (author), Savija, B. (author)The elastic modulus of corrosion product (Ecp) has been reported with significant variations in the literature. This study aims to investigate the Ecp of naturally-generated chloride-induced corrosion products formed in different concrete mixes. Microstructural characterization was conducted through nano-indentation, electron microscopy and...article 2021
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Atli-Veltin, B. (author), Coppejans, O.J. (author), Hoogeland, M. (author), van Bergen, J.W. (author)Increasing resistance against impact, either from other ships, floating objects or icebergs, will make shipping safer. Lean Duplex, which is in the stainless steel family, has high strength, and corrosion resistance. Lean Duplex is investigated focusing on its crash resistance in raking scenarios as part of an ongoing project. Material...conference paper 2020
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Roubos, A. (author), Allaix, D. (author), Fischer, K. (author), Steenbergen, R. (author), Jonkman, S. (author)General frameworks for reliability differentiation have evolved over time and are mainly developed for buildings. However, recommendations for the safety of existing quay walls are lacking. In this study, target reliability indices for assessing existing quay walls were derived by economic optimisation and by evaluating the requirements...article 2020
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Roubos, A.A. (author), Allaix, D.L. (author), Schweckendiek, T. (author), Steenbergen, R.D.J.M. (author), Jonkman, S.N. (author)The assessment of service-proven quay walls subject to corrosion-induced degradation is inherently a time-dependent reliability problem. Two major challenges are the modelling of corrosion and taking into account the decrease of epistemic uncertainty throughout the quay wall’s service life. The main objective of this study is to examine the...article 2020
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Saeed, A. (author), Volker, A.W.F. (author), Martina, Q. (author), Alalouni, A. (author)Scale and corrosion affect the production certainty of oil and gas well. Scale build-up reduces flow and ultimately could shut down production when it block to tubing completely. Corrosion of the tubing wall occurs very often simultaneously with scale build-up and affects the integrity of the tubing wall. Vital information about the integrity is...conference paper 2019
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Zhang, X. (author), Hoogeland, M.G. (author)After chain making, proof load testing is used to evaluate if the chains are mechanically qualified. However, proof load testing may bring elongation in the chain links that may affect the corrosion performance of mooring chains in seawater. The influence of deformation and microorganisms on the corrosion properties of chain steel in seawater...article 2019
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Vandeweijer, V. (author), Hofstee, C. (author), Graven, H. (author)Since 2004 the feasibility of CO2 injection and storage in depleted natural gas fields has been researched and demonstrated at K12-B, a gas field on the Dutch continental shelf. In total over 100 Kton of CO2 was injected. The entire operation at the K12-B field was completed without any major complications. It can therefore be stated that safe...conference paper 2018
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Polder, R.B. (author), van Put, M. (author), Peelen, W.H.A. (author)Testing for the chloride threshold (also called critical chloride content) for corrosion initiation of steel in concrete has been found difficult and, at best, time consuming. Nevertheless, the chloride threshold is an important parameter in service life design of new structures and for evaluation of the remaining service life of existing...conference paper 2017
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Polder, R.B. (author), Boutz, M.M.R. (author), Ottelé, M. (author)Asset managers would benefit from knowing when to expect corrosion initiation in a particular reinforced concrete structure. However, accepted approaches to test existing structures for the remaining time to corrosion initiation are lacking. This paper proposes such an approach, based on experience in the field and additional considerations....conference paper 2017
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Yang, Z. (author), Polder, R. (author), Mol, J.M.C. (author), Andrade, C. (author)Two modified Mg-Al hydrotalcites (MHTs), (MHT-pAB and MHT-NO2) were incorporated into mortar (with different w/c ratios) in two different ways: (1) as one of the mixing components in bulk mortar; (2) as part of cement paste coating of the reinforcing steel. Accelerated chloride migration, cyclic wetting-drying and diffusion tests were performed...article 2017
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van Breugel, K. (author), Polder, R.B. (author), de Rooij, M.R. (author)For many concrete infrastructural works a service life of 80, 100 or 200 years is required. To convince owners and authorities that these requirements can be met probability-based models for service life predictions have been developed. These models are based on theoretical and experimental laboratory studies. Many of these models focus on the...conference paper 2017
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Yang, Z. (author), Polder, R. (author), Mol, J.M.C. (author)Owing to the unique molecular structure and high ion exchange capacity, hydrotalcites are believed to have a potential to be modified and tailor-made as an active corrosion protective component of reinforced concrete. In this paper, two types of modified hydrotalcites (MHT-pAB and MHT-NO2) were tested both in alkaline solution and mortar for...article 2017
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Angst, U.M. (author), Geiker, M.R. (author), Michel, A. (author), Gehlen, C. (author), Wong, H. (author), Isgor, O.B. (author), Elsener, B. (author), Hansson, C.M. (author), Francois, R. (author), Hornbostel, K. (author), Polder, R.B. (author), Alonso, M.C. (author), Sanchez, M. (author), Correia, M.J. (author), Criado, M. (author), Sagues, A. (author), Buenfeld, N. (author)Although the steel–concrete interface (SCI) is widely recognized to influence the durability of reinforced concrete, a systematic overview and detailed documentation of the various aspects of the SCI are lacking. In this paper, we compiled a comprehensive list of possible local characteristics at the SCI and reviewed available information...article 2017
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Zhang, X. (author), Noel, N. (author), Ferrari, G. (author), Hoogland, M.G. (author)Failures of mooring lines on floating production, storage and offloading systems (FPSOs) raise concern to the offshore industry. Localized corrosion of mooring chain is regarded as one of main failure mechanisms. The project of Localized Mooring Chain Corrosion (LMCC) is aiming at studying the mechanism of local corrosion on mooring chain steel...conference paper 2016