Franssen, J.G.R. (2022) Determining the Integrity of the Flexible Bladder under Marine Underwater Conditions. Integration Project, Industrial Engineering and Management.
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Abstract
A marine underwater energy storage system is exposed to biofouling which causes biodeterioration of the material. One of the components is made of Ethylene Propylene Diene Monomer (EPDM) on which the impacts of biodeterioration regarding surface deterioration and mechanical property decrease are investigated. In this study, the extent of both impacts is investigated using experiments with a 3D Optical Profilometer and an Universal Testing Machine (UTM). The former was chosen as weighting material excludes the impact of the particles’ dissolution and degradation. It is found that no corrosion occurs on EPDM and also no direct deterioration by macro-organisms is found. Mussels caused an increase in pit depth and quantity after 3 months by a maximum of 0.016 millimetre and factor 4, respectively. Calcium extraction by the mussels is deemed the most likely reason. Since an element is extracted from the compound, it is labeled as biodegradation. Surface roughness alterna- tions of 2 to 4 micrometre were found, which could be due to ocean currents, macrofouler attachment and biotic degradation. Biotic degradation was not found in this study, but is expected to have an impact in the long term. It is suspected that biodeterioration due to biodegradability of EPDMs molecules and its additives determine EPDM’s service life. The decrease in mechanical properties could not be determined due to a lack of information about he initial material values.
| Item Type: | Thesis (Integration Project) |
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| Supervisor name: | Vakis, A. and Prins, W.A. and Mohebbi, M. and Nienhuis, R.M. |
| Degree programme: | Industrial Engineering and Management |
| Thesis type: | Integration Project |
| Language: | English |
| Date Deposited: | 08 Mar 2022 14:47 |
| Last Modified: | 08 Mar 2022 14:47 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/26667 |
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