Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers
To confirm the suitability of aluminum for the heat transfer surfaces as a heat exchanger material for ocean thermal energy conversion, the seawater corrosion resistance of aluminum plates in a plate heat exchanger was experimentally investigated. In this study, four different surface shapes with ch...
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MDPI AG
2025-03-01
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| author | Hirofumi Arima |
| author_facet | Hirofumi Arima |
| author_sort | Hirofumi Arima |
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| description | To confirm the suitability of aluminum for the heat transfer surfaces as a heat exchanger material for ocean thermal energy conversion, the seawater corrosion resistance of aluminum plates in a plate heat exchanger was experimentally investigated. In this study, four different surface shapes with chevron angles of 45° and 60° and different treatment types of A1050 aluminum heat transfer surfaces were processed into herringbone patterns. Additionally, the surfaces of the test plates were either anodized or untreated. In continuously flowing deep ocean water, the surface conditions of the test plates were observed at 1, 3, 6, and 12 months using mass measurements, visual inspection, laser microscopy, and SEM. For the anodized A1050 plates, regardless of the surface shape, there was almost no change in the mass, laser microscopy, or SEM results even after 12 months. In contrast, the untreated plate mass decreased in the samples after 3 months or later, and the mass reduction rate was approximately 2–7%. In conclusion, untreated aluminum is not suitable for use in seawater and an anodizing treatment is necessary for its use in heat exchangers for ocean thermal energy conversion. |
| format | Article |
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| institution | OA Journals |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-03-01 |
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| spelling | doaj-art-7d34b086bca7434baddb46fa7ad208f22025-08-20T01:48:53ZengMDPI AGMetals2075-47012025-03-0115330010.3390/met15030300Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat ExchangersHirofumi Arima0Institute of Ocean Energy, Saga University, Saga 849-4256, JapanTo confirm the suitability of aluminum for the heat transfer surfaces as a heat exchanger material for ocean thermal energy conversion, the seawater corrosion resistance of aluminum plates in a plate heat exchanger was experimentally investigated. In this study, four different surface shapes with chevron angles of 45° and 60° and different treatment types of A1050 aluminum heat transfer surfaces were processed into herringbone patterns. Additionally, the surfaces of the test plates were either anodized or untreated. In continuously flowing deep ocean water, the surface conditions of the test plates were observed at 1, 3, 6, and 12 months using mass measurements, visual inspection, laser microscopy, and SEM. For the anodized A1050 plates, regardless of the surface shape, there was almost no change in the mass, laser microscopy, or SEM results even after 12 months. In contrast, the untreated plate mass decreased in the samples after 3 months or later, and the mass reduction rate was approximately 2–7%. In conclusion, untreated aluminum is not suitable for use in seawater and an anodizing treatment is necessary for its use in heat exchangers for ocean thermal energy conversion.https://www.mdpi.com/2075-4701/15/3/300aluminumplate heat exchangerdeep seawateranodic oxidationcorrosion |
| spellingShingle | Hirofumi Arima Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers Metals aluminum plate heat exchanger deep seawater anodic oxidation corrosion |
| title | Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers |
| title_full | Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers |
| title_fullStr | Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers |
| title_full_unstemmed | Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers |
| title_short | Seawater Corrosion of the Anodized A1050 Aluminum Plate for Heat Exchangers |
| title_sort | seawater corrosion of the anodized a1050 aluminum plate for heat exchangers |
| topic | aluminum plate heat exchanger deep seawater anodic oxidation corrosion |
| url | https://www.mdpi.com/2075-4701/15/3/300 |
| work_keys_str_mv | AT hirofumiarima seawatercorrosionoftheanodizeda1050aluminumplateforheatexchangers |