Effect of corrosion thinning on depth of operation: Case study of an HY-80 steel submarine pressure hull

Effect of corrosion thinning on depth of operation: Case study of an HY-80 steel submarine pressure hull

The effect of corrosion thinning on the collapse pressure of a submarine pressure hull made of HY-80 steel is investigated. Corrosion experiments on the heat-treated steel were conducted using potentiodynamic polarisation and immersion tests in sampled seawater, and compared to the in-situ measureme...

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Bibliographic Details
Published in:Marine structures Vol. 81; p. 103103
Main Authors: Viljoen, Hermanus C., Mahomed, Nawaz, Cupido, Llewellyn H., Mitchell, Greg P.
Format: Journal Article
Language:English
Published: Barking Elsevier Ltd 01-01-2022
Elsevier BV
Subjects:
Chemical analysis
Collapse
Collapse pressure
Corrosion
Corrosion effects
Corrosion rate
Corrosion thinning
Finite element method
Heat treatment
High strength low alloy steels
HY80 steel
Immersion tests (corrosion)
Pressure
Pressure effects
Seawater
Steel
Submarine hull
Submarines
Thinning
Water analysis
HY80 steel
Corrosion thinning
Submarine hull
Collapse pressure
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Summary:The effect of corrosion thinning on the collapse pressure of a submarine pressure hull made of HY-80 steel is investigated. Corrosion experiments on the heat-treated steel were conducted using potentiodynamic polarisation and immersion tests in sampled seawater, and compared to the in-situ measurements of a submarine pressure hull, to establish the annual corrosion thinning rates for the material. A finite element analysis was carried out on the ring-stiffened cylindrical section to determine the collapse pressure over a range of hull thinning, using experimentally obtained stress-strain behaviour of the material. Results on collapse pressures and their associated depth of operation are presented. •In-situ submarine pressure hull corrosion thinning measurements on dry-docked submarine.•Established the corrosion thinning rate for HY-80 steel, using two methods.•Established the actual stress-strain behaviour of the exact material used in the construction of the hull.•Accurately modelled the mid-section of the pressure hull structure.•Developed a relationship for corrosion thinning versus reduction in depth of operation, related to years of operation.
ISSN:0951-8339
1873-4170
DOI:10.1016/j.marstruc.2021.103103