Deposition of Aluminum Coatings by HVOF Process on Complex Geometries

Autor:	Anderson Geraldo Marenda Pukasiewicz, Ramón Sigifredo Cortés Paredes, Gustavo Bavaresco Sucharski, Karen Juliana Vanat
Rok vydání:	2021
Předmět:	Materials science chemistry.chemical_element Substrate (electronics) Adhesion engineering.material Condensed Matter Physics Surfaces Coatings and Films chemistry Coating Aluminium Thermal Materials Chemistry engineering Deposition (phase transition) Particle velocity Composite material Thermal spraying
Zdroj:	Journal of Thermal Spray Technology. 30:1905-1926
ISSN:	1544-1016 1059-9630
DOI:	10.1007/s11666-021-01249-0
Popis:	Thermal sprayed aluminum coatings are widely used for protection against marine corrosion. The high velocity oxy-fuel process (HVOF) makes it possible to deposit aluminum coatings with high particle velocity and, thus, higher coating adhesion than other thermal spray techniques. This work deals with HVOF aluminum coating deposition on complex shapes and investigates the effect of the spray angle on coating formation. It also analyzes the effect of substrate preheating and nitrogen carrier gas flow. The spray angle was the most influential parameter on the HVOF coatings properties. A spraying angle of 60° promoted a better deposition behavior in inner and outer corner complex profiles. However, on internal corners and concave surfaces, the coating microstructure presented voids and cracks. A spray angle of 90° increased the adhesion and resulted in better results for the potentiodynamic polarization tests on concave and convex samples.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::28f0dda90db50a487af5418d120416ed https://doi.org/10.1007/s11666-021-01249-0 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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