Cavitation-silt erosion behavior and mechanism in simulated sea water slurries of cermet coatings manufactured by HVOF spraying. (1st May 2023)

• Record Type: Journal Article
• Authors: Hong, Sheng; Wei, Ziyu; Lin, Jinran; Sun, Wei; Zheng, Yuan
• Is Part Of: Ceramics international. Volume 49(2023)Part A
• Page Start: 14355
• Page End: 14366
• Publication Date: 2023-05-01
• Subjects: Cavitation-silt erosion -- Cermet coating -- HVOF -- Sand concentration -- Flow velocity; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2023.01.024
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Understanding the interaction between the sea water slurries and flow-handling components is important for enhancing the cavitation-silt erosion (CSE) resistance of the ocean power generation systems. In this manuscript, two cermet coatings (i.e., Cr3 C2 -25(NiCr) coating and WC-10(Ni) coating) were manufactured via a high-velocity oxygen fuel (HVOF) spraying method, and influences of sand concentrations (SCs) as well as flow velocities (FVs) on their CSE characteristics in simulated sea water slurries (SSWS) were investigated. Results indicated that the Cr3 C2 -25(NiCr) coating exhibited larger porosity, lower hardness ( H ) and elastic modulus ( E ), stronger ability to resist corrosion in 3.5 wt% saline solution as well as worse CSE resistance in SSWS, and its CSE resistance was more affected by both the SC and FV by comparison to the WC-10(Ni) coating. Both SC and FV had a positive effect on the CSE damage for the Cr3 C2 -25(NiCr) and WC-10(Ni) coatings, while SC had more influence on their CSE resistances than FV. The CSE deterioration mechanisms in SSWS under different SCs and FVs of the Cr3 C2 -25(NiCr) and WC-10(Ni) coatings were also compared and revealed.