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| Influence of Sacrificial Anode Parameters on Cathodic Protection for Cycloidal Propellers |
| Received:March 05, 2024 Revised:April 25, 2024 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.07.018 |
| KeyWord:cycloidal propeller sacrificial anode cathodic protection numerical simulation anti-corrosion service life |
| Author | Institution |
| CHEN Bo |
Shanghai Marine Equipment Research Institute, Shanghai , China |
| LIU Aibing |
Shanghai Marine Equipment Research Institute, Shanghai , China |
| SONG Hang |
National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| YANG Wenkai |
Shanghai Marine Equipment Research Institute, Shanghai , China |
| ZHANG Di |
National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
| LIU Guangyi |
National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Shandong Qingdao , China |
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| Abstract: |
| The work aims to investigate the influence of sacrificial anode design parameters on the cathodic protection effectiveness of cycloidal propeller structures, so as to provide insights for the design and engineering applications of cathodic protection. A numerical simulation model based on the boundary element method was established for the structural analysis of cycloidal propellers used in ship propulsion systems. Cathodic protection simulation calculations were conducted, focusing on quantities, sizes, and arrangement positions of different sacrificial anodes. The study emphasized the cathodic protection potential distribution on key structural components such as the upper-box, the rotating-box, blades, and blade end caps of cycloidal propellers, along with the estimation of sacrificial anode service life. Results indicated that increasing the quantity and size of sacrificial anodes made of Al-Zn-In-Mg-Ti aluminum alloy enhanced the cathodic protection effectiveness and extends the service life of sacrificial anodes. Changes in sacrificial anode arrangement positions impacted the potential gradient on blade surfaces and altered the cathodic protection potential distribution of the cycloidal propeller structure. Employing 10 drop-shaped aluminum alloy sacrificial anodes sized at 0.18D×0.11D×0.04D (D was the diameter of cycloidal propeller), arranged in a single layer between blades, could achieve a protection lifespan of over 2.5 years for cycloidal propeller structures. Drawing upon the aforementioned discoveries, optimizing the design parameters of sacrificial anodes can significantly bolster cathodic protection for vital structures, including cycloidal propeller blades and rotating-box housings. Nonetheless, the structural shadowing effects in the gaps between the rotating-box housing and the hull and upper housing lead to inadequate protection. Therefore, it is advisable to implement corrosion-resistant coatings on these structural components during practical engineering applications to alleviate corrosion risks. |
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