Journal
JOURNAL OF THERMAL SPRAY TECHNOLOGY
Volume 30, Issue 6, Pages 1566-1581Publisher
SPRINGER
DOI: 10.1007/s11666-021-01211-0
Keywords
antifouling; Cu-X coating; durable; plasma spray; micro-galvanic dissolution
Categories
Funding
- National Natural Science Foundation of China [52001280]
- Key Research Project of Henan Province [20A430029]
- China Postdoctoral Science Foundation [2020M682339]
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This study introduced an effective antifouling approach using laminated-structured Cu-X composite coatings fabricated through plasma spraying. The research systematically investigated the impact of different cathode X compositions on the micro-galvanic dissolution behavior and antifouling performance of the Cu-X coatings. Results showed that the Cu-X composite coatings exhibited long-lasting antifouling capability and remarkable antifouling efficiency.
Marine biofouling is a ubiquitous and serious problem in maritime engineering. Here, we reported an effective antifouling approach through facile fabrication of laminated-structured Cu-X composite coatings by plasma spraying of mechanically blended Cu and X powders, in which X is a type of metal nobler than Cu. The Cu-X coatings were designed to controlled release Cu ions from Cu/X micro-galvanic cells and thus to achieve long-term and effective antifouling performance. The effect of cathode X composition (i.e., Ni, stainless steel (SS), and Ti) on the micro-galvanic dissolution behavior and antifouling performance of the Cu-X coatings was systematically investigated. Results indicated that the cathode X composition exhibited little influence on the micro-galvanic dissolution mechanism of Cu-X coatings. Nevertheless, Cu ions release rate increased as follows: Cu-Ni coating < Cu-SS coating < Cu-Ti coating. Moreover, the Cu-X composite coatings exhibited long-lasting antifouling capability and remarkable antifouling efficiency of similar to 100%. Electrochemical test results revealed that the potential difference between Cu/X was the primary factor determining the difference of Cu dissolution rate and thus the Cu ions release rate between different Cu-X coatings. These results would open a new window for designing long-term and environment-friendly Cu-X antifouling coatings by employing various tunable bimetals.
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