The hydrothermal performance and corrosion resistance of MgO@Nb2O5 composite coatings on Mg–7Y alloy in natural seawater

Chang Liu; Quantong Jiang; Qiang Sun; Siwei Wu; Heng Tang; Dongzhu Lu; Nazhen Liu; Jizhou Duan; Baorong Hou

Journal of Materials Research and Technology (Sep 2023)

The hydrothermal performance and corrosion resistance of MgO@Nb2O5 composite coatings on Mg–7Y alloy in natural seawater

Chang Liu,
Quantong Jiang,
Qiang Sun,
Siwei Wu,
Heng Tang,
Dongzhu Lu,
Nazhen Liu,
Jizhou Duan,
Baorong Hou

Affiliations

Chang Liu: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China
Quantong Jiang: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China; Sanya Institute of Ocean Eco-Environmental Engineering, Zhenzhou Road, Sanya 572000, China; Corresponding author. School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China.
Qiang Sun: China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China
Siwei Wu: China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China
Heng Tang: China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China
Dongzhu Lu: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China
Nazhen Liu: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China; Corresponding author. School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China.
Jizhou Duan: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China; Sanya Institute of Ocean Eco-Environmental Engineering, Zhenzhou Road, Sanya 572000, China
Baorong Hou: School of Materials Science and Engineering, Qilu University of Technology, No.3501, Daxue Road, Jinan 250353, PR China; China CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, No.7 Nanhai Road, Qingdao 266071, China; Laoshan Laboratory Marine Corrosion and Protection Open Studio, No.1 Wenhai Road, Qingdao 266071, China; Sanya Institute of Ocean Eco-Environmental Engineering, Zhenzhou Road, Sanya 572000, China

Journal volume & issue: Vol. 26
pp. 9203 – 9223

Abstract

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MgO@Nb2O5 composite coating was prepared on the surface of Mg–7Y alloy by micro-arc oxidation technique. The microstructure of the composite coatings was tested by scanning electron microscopy, energy spectrum analysis, X-ray diffraction and scanning kelvin probe force microscope. The hydrothermal performance and corrosion resistance of MgO@Nb2O5 composite coatings were analyzed by electrochemistry tests and laser confocal. The results showed that microspore diameter, porosity and roughness of the composite coatings were all decreased with the increasing of Nb2O5 concentration. The micro-arc oxidation composite coatings were mainly composed of MgO and Nb2O5. Compared with the micro-arc oxidation coating without Nb2O5, the corrosion voltage of the micro-arc oxidation coating with Nb2O5 was increased and the corrosion current was reduced. The corrosion resistance of Mg–7Y alloy was effectively improved by the MgO@Nb2O5 composite coatings, and the best corrosion resistance of the micro-arc oxidation coating was achieved when the Nb2O5 concentration was 2 g/L. The hydrothermal test demonstrated that the hydrothermal resistance of the coatings was significantly improved due to the addition of Nb2O5.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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