A Life at Sea and the Corrosion Fatigue Lives of Offshore Structures

Thomas, Daniel J.

doi:10.1007/s11668-021-01158-y

Cited by 3 publications

(2 citation statements)

References 3 publications

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“…Even for a well-designed structure, with a long time of exposure to the harsh marine environment, corrosion causes the degradation of the metal leading to create corrosion fatigue cracks and, consequently, structural failure. This scenario increases the O&M cost because of the possibility of more frequent maintenance, repair activities, and any replacement if needed [18]. Therefore, a successful corrosion monitoring approach can potentially decrease the ongoing O&M cost of wind turbines directed at reducing economic losses and environmental damages.…”

Section: Structural Health Monitoring Of Wind Turbines: Corrosion Monitoringmentioning

confidence: 99%

Ultrasound-Based Smart Corrosion Monitoring System for Offshore Wind Turbines

2022

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The ultrasound technique is a well-known non-destructive and efficient testing method for on-line corrosion monitoring. Wall thickness loss rate is the major parameter that defines the corrosion process in this approach. This paper presents a smart corrosion monitoring system for offshore wind turbines based on the ultrasound pulse-echo technique. The solution is first developed as an ultrasound testbed with the aim of upgrading it into a low-cost and low-power miniaturized system to be deployed inside offshore wind turbines. This paper discusses different important stages of the presented monitoring system as design methodology, the precision of the measurements, and system performance verification. The obtained results during the testing of a variety of samples show meaningful information about the thickness loss due to corrosion. Furthermore, the developed system allows us to measure the Time-of-Flight (ToF) with high precision on steel samples of different thicknesses and on coated steel samples using the offshore standard coating NORSOK 7A.

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Section: Structural Health Monitoring Of Wind Turbines: Corrosion Monitoringmentioning

confidence: 99%

Ultrasound-Based Smart Corrosion Monitoring System for Offshore Wind Turbines

2022

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“…Considering the increased usage amount of UHSS, the localized corrosion caused by UHSS may reduce the fatigue performance. Hence, corrosion fatigue crack initiation and propagation could be greatly accelerated, resulting in a significant decline of fatigue life [21][22][23][24][25][26]. Therefore, the corrosion behavior of bridge steel in this environment must be studied, especially the synergy influence of the galvanic corrosion and fatigue behaviors to the welded joints.…”

Section: Introductionmentioning

confidence: 99%

Galvanic Corrosion and Fatigue Behavior of a SM480C Welded Joint Steel in a Sea-Crossing Suspension Bridge

Zhou¹,

Zhang²,

Xu³

et al. 2022

International Journal of Corrosion

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The corrosion tendency and fatigue behavior of a SM480C welded joint in a sea-crossing suspension bridge after twenty-year exposure to a marine environment was investigated in this work. It was found that the corrosion product on the whole surface of the welded joint is loose, with many holes and cracks, which allowing corrosive media enter and reach the surface of the substrate. Localized corrosion occurred in the weld zone (WZ) and the heat-affected zone (HAZ), the maximum depth of localized corrosion in the HAZ reached 1.8 mm, and the maximum local corrosion rate is 0.082 mm/y. By using Bimetallic Conjugation Theory calculations, the galvanic effect of the welded joint was qualified, indicates that HAZ was the most corrosion susceptible area in the welded joint. The galvanic corrosion current on HAZ reached approximately 2 μA, which is much higher than the corrosion of isolated HAZ by about 6.5 times. The corrosion has an obvious influence on the fatigue performance, the elongation of the bridge deck decreases by 40%~70%, and the tensile strength decreases by 4.5%~31.33%. In order to ensure the service safety and avoid premature failure, the average thickness of the corroded bridge deck should not be less than 10 mm under the stress amplitude of 115 MPa.

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Corrosion in Wind Turbine Components

Al-Moubaraki

2024

Encyclopedia of Renewable Energy, Sustainability and the Environment

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A Life at Sea and the Corrosion Fatigue Lives of Offshore Structures

Cited by 3 publications

References 3 publications

Ultrasound-Based Smart Corrosion Monitoring System for Offshore Wind Turbines

Ultrasound-Based Smart Corrosion Monitoring System for Offshore Wind Turbines

Galvanic Corrosion and Fatigue Behavior of a SM480C Welded Joint Steel in a Sea-Crossing Suspension Bridge

Corrosion in Wind Turbine Components

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