About: Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content

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About: Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Use of creep-resistant steel P92 in modern power plants enables increase of service temperature up to 650 °C. Some alloying elements (Cr, W) can easily increase their oxidation states and form volatile compounds in high steam parameters environments. Very similar degradation mechanism is observed in strongly oxidizing aqueous environments, where these alloys are subject to transpassive dissolution. Model melts containing constant chromium content (9 wt.%) and variable amount of carbon (0.01 - 0.63 wt. %) and tungsten (1.5 - 4.0 wt. %) were used for study of the influence of alloying elements. Structure of these alloys was characterized using optical and scanning electron microscope. Electrochemical behaviour was evaluated by potentiodynamic method. Model alloys showed to have dissimilar structure compared to industrial melts of P92, however, shapes of their potentiodynamic curves are very similar. The curve in transpassive area is accompanied by formation of substantial local peaks whose position differ according to chemical composition and heat treatment of the alloy. The model alloys were potentiostatically etched in local peaks areas and characterized using scanning electron microscope equipped by EDS analyser. Use of creep-resistant steel P92 in modern power plants enables increase of service temperature up to 650 °C. Some alloying elements (Cr, W) can easily increase their oxidation states and form volatile compounds in high steam parameters environments. Very similar degradation mechanism is observed in strongly oxidizing aqueous environments, where these alloys are subject to transpassive dissolution. Model melts containing constant chromium content (9 wt.%) and variable amount of carbon (0.01 - 0.63 wt. %) and tungsten (1.5 - 4.0 wt. %) were used for study of the influence of alloying elements. Structure of these alloys was characterized using optical and scanning electron microscope. Electrochemical behaviour was evaluated by potentiodynamic method. Model alloys showed to have dissimilar structure compared to industrial melts of P92, however, shapes of their potentiodynamic curves are very similar. The curve in transpassive area is accompanied by formation of substantial local peaks whose position differ according to chemical composition and heat treatment of the alloy. The model alloys were potentiostatically etched in local peaks areas and characterized using scanning electron microscope equipped by EDS analyser. (en)
Title	Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content (en)
skos:prefLabel	Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content Structure and electrochemical behaviour of Fe-9Cr-W alloys with variable carbon and tungsten content (en)
skos:notation	RIV/60461373:22310/13:43896630!RIV14-MPO-22310___
http://linked.open...avai/predkladatel	Fakulta chemické technologie
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(FR-TI1/086), S
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Bystrianský, Jaroslav Rapouch, Jiří
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemické technologie
http://linked.open...dnocenehoVysledku	108379
http://linked.open...ai/riv/idVysledku	RIV/60461373:22310/13:43896630
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	creep resistant Fe-9Cr steel, polarization curve, electrochemical detection (en)
http://linked.open.../riv/klicoveSlovo	creep resistant Fe-9Cr steel electrochemical detection polarization curve
http://linked.open...ontrolniKodProRIV	[EA9D0558223E]
http://linked.open...v/mistoKonaniAkce	Brno
http://linked.open...i/riv/mistoVydani	Ostrava
http://linked.open...i/riv/nazevZdroje	Conference METAL 2013 proceedings
http://linked.open...in/vavai/riv/obor	JK
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	New design approach of energetic components and steel structures with high utility parameters, JSC
http://linked.open...UplatneniVysledku	2013
http://linked.open...iv/tvurceVysledku	Bystrianský, Jaroslav Rapouch, Jiří
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open.../riv/zahajeniAkce	2013-05-15 (xsd:date)
number of pages	4 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Tanger s.r.o.
https://schema.org/isbn	978-80-87294-39-0
http://localhost/t...ganizacniJednotka	22310

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