Antifouling Properties and Release of Dissolved Copper of Cold Spray Cu/Cu{sub 2}O Coatings for Ships and Steel Structures in Marine Environment
- Yantai University, College of Oceanography (China)
- Luoyang Ship Material Research Institute (LSRMI), Science and Technology on Marine Corrosion and Protection Laboratory (China)
- Ocean University of China (China)
- Sun Yat-sen University, College of Chemical Engineering and Technology (China)
- Marine Chemical Research Institute, State Key Laboratory of Marine Coatings (China)
At the submarine screen doors of ships, the flow of water was fast and organic coatings were easy to peel off. To solve the problems of biofouling, the Cu/Cu{sub 2}O coatings were prepared by cold spray technology. In this paper, the release mechanism of effective antifouling components of the coatings was studied by micro-domain electrochemical potential scanning technique. Cuprous oxide in the coatings and the surrounding copper constituted micro-cells which accelerated the local electrochemical dissolution of copper. Cuprous oxide acted as the cathode, and the surrounding copper acted as the anode. Meanwhile, under the action of current, chloride ions were transferred from cathode to the anode and promoted local electrochemical dissolution of copper. Experiments show that the higher the Cu{sub 2}O content in the coatings, the greater the release rate of dissolved copper and inhibitory effect on diatoms. In the environments varied in dissolved oxygen, salinity, temperature and flow rate, the coatings maintained sufficient release rate of dissolved copper, unless the salinity was very low. Most of the dissolved copper was provided by the electrochemical dissolution process of copper. Whether in the indoor test or marine environment experiments, 30% Cu{sub 2}O coatings show the best performance. After insulating layer was sprayed, the effect of antifouling was improved evidently and the coatings were applied to the submarine screen doors of ships.
- OSTI ID:
- 22863223
- Journal Information:
- Journal of Materials Engineering and Performance, Vol. 27, Issue 11; Other Information: Copyright (c) 2018 ASM International; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); ISSN 1059-9495
- Country of Publication:
- United States
- Language:
- English
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