Corrosion fatigue behavior of mooring chain steel in seawater

Alberto Arredondo, Jonathan Fernández, Elena Silveira, Josí Lu s. Arana

Producción científica: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

10 Citas (Scopus)

Resumen

With a majority of the reported chain failures related to fatigue, this phenomenon is one of the main topics to be studied as part of Mooring Integrity Management. Present fatigue design is mainly based on fatigue curves for chains under tension-tension loads in seawater. However, the applicability of these curves for different loading modes and specific environments remains unclear. This paper studies the fatigue behavior of the material used on chains as it builds the baseline for the performance of these mooring components. It includes uniaxial fatigue tests that were undertaken on R4 and R5 steel grades obtained from actual chains after all their manufacturing steps. Samples were not only tested in air and in synthetic seawater but different corrosion related parameters were also studied: frequency, temperature and cathodic protection. From the results of these tests, separated SN curves were obtained. Subsequently, these curves were analyzed and compared against present recommended design curves for material. Fractographic examination was undertaken to assess the effect of corrosion and cathodic protection and comparison between material and component response was also addressed. Results showed the strong synergy between corrosion and fatigue. Also, the improvement from fatigue design curves to actual response of the materials was quantified.

Idioma originalInglés
Título de la publicación alojadaOffshore Technology; Offshore Geotechnics
EditorialAmerican Society of Mechanical Engineers (ASME)
ISBN (versión digital)9780791849927
DOI
EstadoPublicada - 2016
EventoASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2016 - Busan, República de Corea
Duración: 19 jun 201624 jun 2016

Serie de la publicación

NombreProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volumen1

Conferencia

ConferenciaASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2016
País/TerritorioRepública de Corea
CiudadBusan
Período19/06/1624/06/16

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