RT Journal Article
T1 Corrosion fatigue numerical model for austenitic and lean-duplex stainless-steel rebars exposed to marine environments
A1 Calderón-Uríszar-aldaca, Iñigo
A1 Briz, Estibaliz
A1 Matanza, Amaia
A1 Martin, Ulises
A1 Bastidas, David M.
AB Steel rebars of structures exposed to cyclic loadings and marine environments suffer an accelerated deterioration process by corrosion fatigue, causing catastrophic failure before service life ends. Hence, stainless steel rebars have been emerging as a way of mitigating pitting corrosion contribution to fatigue, despite the increased cost. The present study proposes a corrosion fatigue semiempirical model. Different samples of rebars made of carbon steel, 304L austenitic (ASS), 316L ASS, 2205 duplex (DSS), 2304 lean duplex stainless steels (LDSS), and 2001 LDSS have been embedded in concrete and exposed to a tidal marine environment for 6 months. Corrosion rates of each steel rebar have been obtained from direct measurement and, considering rebar standard requirements for fatigue and fracture mechanics, an iterative numerical model has been developed to derive the cycles to failure for each stress range level. The model resulted in a corrosion pushing factor for each material, able to be used as an accelerating coefficient for the Palmgren-Miner linear rule and as a performance indicator. Carbon steel showed the worst performance, while 2001 LDSS performed 1.5 times better with the best cost-performance ratio, and finally 2205 DSS performed 1.5 times better than 2001 LDSS.
SN 2075-4701
YR 2020
FD 2020-09-10
LA eng
NO Calderón-Uríszar-aldaca , I , Briz , E , Matanza , A , Martin , U & Bastidas , D M 2020 , ' Corrosion fatigue numerical model for austenitic and lean-duplex stainless-steel rebars exposed to marine environments ' , Metals , vol. 10 , no. 9 , 1217 , pp. 1-19 . https://doi.org/10.3390/met10091217 , https://doi.org/10.3390/met10091217
NO Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
NO Acknowledgments: The tests presented in this manuscript were performed as part of the IISIS: “Investigación Integrada en Islas Sostenibles” (Integrated research in Sustainable Islands) research project, in receipt of funding from the Center for the Development of Industrial Technology (CDTI) and the Technological Fund, part of the Spanish Ministry of Industry, through the INNPRONTA research program. The final goal of the project is to research different technologies for building offshore island-cities, involving construction, energy and smart technologies with leading companies and research centers focused on each field. In the field of construction, the challenge is to develop modular construction and special marine reinforced concrete for the construction of islands that are capable of withstanding corrosive marine environments. In this context, most pathologies linked to reinforced concrete in marine environments are caused by rebar deterioration within the concrete and especially by chloride attack. The use of stainless steels is a very promising way to solve this problem, as has been demonstrated in several tests, among which are those presented in this paper. Finally, we are also especially thankful to ACERINOX EUROPA (part of the ACERINOX Group) for funding the IISIS project, supplying the necessary rebar samples for testing, and particularly to Rafael Sanchez and Julia Contreras from Technical Departments/Labs for their expertise and for their commitment that greatly assisted our research. Funding: The authors would like to acknowledge funding support from Centre for Industrial Technological Development CDTI and ACERINOX EUROPA, that funded the materials and experiments through the grant of IISIS project: IPT-20111023 and UPV/EHU PPGA19/61 contract. Besides, they would also like to acknowledge the University of Akron, Fellowship Program FRC-207367, the IT1314-19 (Basque Government) and GIU19/029 (UPV/EHU) research groupsand the Laboratoire des ciencies de l’ingenieur appliquées, Fédération IPRA-EA4581, from the Université de Pau et Pays de l’Adour, for their support setting a cooperation framework for this research. The authors would like to acknowledge funding support from Centre for Industrial Technological Development CDTI and ACERINOX EUROPA, that funded the materials and experiments through the grant of IISIS project: IPT-20111023 and UPV/EHU PPGA19/61 contract. Besides, they would also like to acknowledge the University of Akron, Fellowship Program FRC-207367, the IT1314-19 (Basque Government) and GIU19/029 (UPV/EHU) research groupsand the Laboratoire des ciencies de l?ingenieur appliqu?es, F?d?ration IPRA-EA4581, from the Universit? de Pau et Pays de l?Adour, for their support setting a cooperation framework for this research.
DS TECNALIA Publications
RD 23 jul 2024