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Durable self-polishing antifouling cu-ti coating by a micron-scale cu/ti laminated microstructure design

Journal of Materials Science & Technology 2021年第20期79卷 62-74页

作者： Jiajia tian Kangwei Xu Junhua Hu Shijie Zhang Guoqin Cao Guosheng Shao State Centre for International Cooperation on Designer Low-Carbon and Environmental Material(SCICDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou450001China Special Functional Materials Department Luoyang Ship Material Research InstituteLuoyang471023China School of Life Science Zhengzhou UniversityZhengzhou450001China

Marine biofouling is a major issue deteriorating the service performance and lifespan of marine infrastructures.The development of a durable,long-term,and environment-friendly antifouling coating is therefore of significant importance but still a critical challenge in maritime engineering.Herein,we developed a cu-ti composite antifouling coating with micron-sized alternating laminated-structure of cu/ti by plasma spraying of mechanically mixed cu/ti powders.The coating was designed to enable controlled release of cu ions through galvanic dissolution of cu laminates from the cu/ti micro-galvanic cell in aqueous solution.Results showed that remarkable antifouling efficiency against bacterial survival and adhesion up to~100%was achieved for the cu-ti coating.cu/ti micro-galvanic cell was in-situ formed within cu-ti coating and responsible for its cu ions release.The successive dissolution of cu laminates resulted in the formation of micro-channels under ti laminates near surface,which contributed to controlled slow cu ions release and self-polishing effect.Thus,environment-friendly antifouling capability and∼200%longer antifouling lifetime than that of the conventional organic antifouling coatings can be achieved for the cu-ti coating.On the other hand,as compared to the conventional organic antifouling coatings,the cu-ti composite coating presented much higher mechanical durability due to its strong adhesion strength,excellent mechanical properties,and two orders lower wear rate.The present laminated cu-ti coating exhibits combination of outstanding antifouling performance and high mechanical durability,which makes this coating very potentially candidates in marine antifouling application.

关键词： Marine antifouling cu-ti coating Plasma spraying Micro-galvanic dissolution Durable Self-polishing

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