Temporal variability in corrosion modeling and reliability updating
Many parameters influencing corrosion degradation are time-variant and the corrosion process is thus subject to temporal variability, the real characteristics of which are commonly neglected in reliability assessment. After a short overview on the quantitative modeling of corrosion loss, a compariso...
| Published in: | 24th International Conference on Offshore Mechanics and Arctic Engineering: Volume 2 |
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| Main Authors: | , |
| Format: | Conference Object |
| Language: | English |
| Published: |
2005
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| Subjects: | |
| Online Access: | https://vbn.aau.dk/da/publications/8a2798cd-3c3e-4885-86a7-b59c52c6e098 https://doi.org/10.1115/OMAE2005-67199 http://www.scopus.com/inward/record.url?scp=27744541087&partnerID=8YFLogxK |
| Summary: | Many parameters influencing corrosion degradation are time-variant and the corrosion process is thus subject to temporal variability, the real characteristics of which are commonly neglected in reliability assessment. After a short overview on the quantitative modeling of corrosion loss, a comparison is made between different temporal models of corrosion degradation and the consequences of applying an inappropriate model are investigated. The effect of temporal variability is then investigated in detail and illustrated on an example considering CO 2 corrosion in pipelines. It is demonstrated how the time-variant corrosion process can be consistently represented by constant parameters, using equivalent values of the corrosion rate. Finally the influence of temporal variability on the reliability updating following inspections is investigated and it is shown how this effect can be accounted for in inspection planning. |
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