Název: High temperature corrosion behaviour of nicr-based coatings applied by twin wire arc spray technology
Autoři: Lencová, K. ; Vostřák, M. ; Naďová, J. ; Lukáč, František ; Mušálek, Radek
Typ dokumentu: Příspěvky z konference
Konference/Akce: Anniversary International Conference on Metallurgy and Materials - METAL 2021 /30./, Brno (CZ), 20210526
Rok: 2021
Jazyk: eng
Abstrakt: High temperature corrosion is a serious problem related to the combustion of heavy oils with high vanadium contents. Protective overlay coatings are used to allow functioning of engineering components under extreme conditions and provide corrosion resistance to extend the component life. This article is concerned with the high temperature corrosion behaviour of two protective NiCr-based coatings and bare structural steel 1.4959 (W.nr.) in a molten salt environment of 40% Na2SO4 and 60% V2O5 at 750 °C under cyclic condition. NiCr and NiCrMoNbTa coating was deposited on steel 1.4903 (W.nr.) by Twin wire arc spray technology (TWAS). To establish the kinetics of corrosion, the thermogravimetric technique was used. The X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) techniques were used to analyse the corrosion products and determine the corrosion mechanism. The hot corrosion resistance of both coatings was better than bare steel samples. The NiCrMoNbTa coating showed better corrosion behaviour than the NiCr coating. However, also the NiCr coating provides sufficient protection to the substrate material.
Klíčová slova: Heavy oils; High temperature corrosion; NiCr; NiCr-based coating; NiCrMoNbTa; Twin Wire Arc Spray; Vanadium
Zdrojový dokument: METAL 2021. 30th Anniversary International Conference on Metallurgy and Materials. Conference proceedings, ISBN 978-80-87294-99-4, ISSN 2694-9296
Poznámka: Související webová stránka: https://www.confer.cz/metal/2021/4185-high-temperature-corrosion-behaviour-of-nicr-based-coatings-applied-by-twin-wire-arc-spray-technology

Instituce: Ústav fyziky plazmatu AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: https://hdl.handle.net/11104/0337580

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-512266


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