Effect of Marine Bacillus Subtilis on Cavitation Erosion Resistance of HVOF-Sprayed WC-10Co-4Cr Coating in Artificial Seawater

IF 3.2 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS Journal of Thermal Spray Technology Pub Date : 2024-07-11 DOI:10.1007/s11666-024-01812-5

Zhe Guo, Miao Yu, Ye Tian, Ping Zhou, Jiewen Wang, Jin Liu, Xu Yin, Rui Yang, Xiuyong Chen, Hua Li

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Abstract

This study examined the influence of Bacillus subtilis adhesion on the corrosion and cavitation erosion resistance of high-velocity oxy-fuel (HVOF) sprayed WC-10Co-4Cr coatings. The polished HVOF-sprayed WC-10Co-4Cr coatings were divided into two groups: one immersed in artificial seawater (ASW) and the other immersed in ASW containing Bacillus subtilis (BASW). Following an immersion period of 42 days, chromium oxide was detected on the ASW-immersed coating according to x-ray diffraction, while the BASW-immersed coating showed no signs of oxidation or corrosion. Electrochemical testing indicated compromised corrosion resistance in both the coatings. Nonetheless, the corrosion resistance of the BASW-immersed coating was much better than the ASW-immersed coating, suggesting that the Bacillus subtilis biofilm protected the coating surface from the corrosive substances in ASW, such as chloride ions and oxygen. Cavitation erosion testing revealed that prior immersion in ASW accelerated the erosion process, while the BASW-immersed coating displayed better resistance to cavitation erosion due to the inhibited corrosion attained by the Bacillus subtilis biofilm.

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海洋枯草芽孢杆菌对人工海水中 HVOF 喷涂 WC-10Co-4Cr 涂层抗气蚀性能的影响

本研究考察了枯草芽孢杆菌附着对高速纯氧燃料（HVOF）喷涂的 WC-10Co-4Cr 涂层抗腐蚀和抗气蚀性能的影响。将抛光的 HVOF 喷射 WC-10Co-4Cr 涂层分为两组：一组浸入人工海水（ASW）中，另一组浸入含有枯草芽孢杆菌的 ASW（BASW）中。浸泡 42 天后，根据 X 射线衍射，在浸泡过 ASW 的涂层上检测到氧化铬，而浸泡过 BASW 的涂层则没有氧化或腐蚀迹象。电化学测试表明，两种涂层的耐腐蚀性都受到了影响。不过，BASW 浸渍涂层的耐腐蚀性要比 ASW 浸渍涂层好得多，这表明枯草芽孢杆菌生物膜保护了涂层表面免受 ASW 中氯离子和氧气等腐蚀性物质的侵蚀。气蚀测试表明，先浸泡在 ASW 中会加速气蚀过程，而浸泡在 BASW 中的涂层由于枯草芽孢杆菌生物膜的抑制腐蚀作用，显示出更好的抗气蚀能力。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.