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Metals 2018, 8(9), 700; https://doi.org/10.3390/met8090700

Hydrogen Embrittlement Susceptibility of R4 and R5 High-Strength Mooring Steels in Cold and Warm Seawater

1
Tecnun, University of Navarra, Manuel de Lardizábal 15, 20018 San Sebastián, Spain
2
IK4-AZTERLAN, Research and Development of Metallurgical Processes, Aliendalde Auzunea 6, 48200 Durango, Spain
3
Vicinay Marine Innovación, Ibaiondo 1, 48940 Leioa, Bizkaia, Spain
*
Author to whom correspondence should be addressed.
Received: 7 August 2018 / Revised: 31 August 2018 / Accepted: 4 September 2018 / Published: 6 September 2018
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Abstract

Hydrogen embrittlement susceptibility ratios calculated from slow strain rate tensile tests have been employed to study the response of three high-strength mooring steels in cold and warm synthetic seawater. The selected nominal testing temperatures have been 3 °C and 23 °C in order to resemble sea sites of offshore platform installation interest, such as the North Sea and the Gulf of Mexico, respectively. Three scenarios have been studied for each temperature: free corrosion, cathodic protection and overprotection. An improvement on the hydrogen embrittlement tendency of the steels has been observed when working in cold conditions. This provides a new insight on the relevance of the seawater temperature as a characteristic to be taken into account for mooring line design in terms of hydrogen embrittlement assessment. View Full-Text
Keywords: SSRT; hydrogen embrittlement; high-strength steel; cathodic protection; mooring; sea temperature effect SSRT; hydrogen embrittlement; high-strength steel; cathodic protection; mooring; sea temperature effect
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Artola, G.; Arredondo, A.; Fernández-Calvo, A.I.; Aldazabal, J. Hydrogen Embrittlement Susceptibility of R4 and R5 High-Strength Mooring Steels in Cold and Warm Seawater. Metals 2018, 8, 700.

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