FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W68521710> ?p ?o ?g. }

• W68521710 abstract "The use of waste (or recycled) wood as a fuel in heat and power stations is becoming more widespread in Sweden (and Europe), because it is CO2 neutral with a lower cost than forest fuel. However, it is a heterogeneous fuel with a high amount of chlorine, alkali and heavy metals which causes more corrosion than fossil fuels or forest fuel.A part of the boiler which is subjected to a high corrosion risk is the furnace wall (or waterwall) which is formed of tubes welded together. Waterwalls are made of ferritic low-alloyed steels, due to their low price, low stress corrosion cracking risk, high heat transfer properties and low thermal expansion. However, ferritic low alloy steels corrode quickly when burning waste wood in a low NOx environment (i.e. an environment with low oxygen levels to limit the formation of NOx). Apart from pure oxidation two important forms of corrosion mechanisms are thought to occur in waste environments: chlorine corrosion and alkali corrosion.Although there is a great interest from plant owners to reduce the costs associated with furnace wall corrosion very little has been reported on wall corrosion in biomass boilers. Also corrosion mechanisms on furnace walls are usually investigated in laboratories, where interpretation of the results is easier. In power plants the interpretation is more complicated. Difficulties in the study of corrosion mechanisms are caused by several factors such as deposit composition, flue gas flow, boiler design, combustion characteristics and flue gas composition. Therefore, the corrosion varies from plant to plant and the laboratory experiments should be complemented with field tests. The present project may thus contribute to fill the power plant corrosion research gap.In this work, different kinds of samples (wall deposits, test panel tubes and corrosion probes) from Vattenfall’s Heat and Power plant in Nykoping were analysed. Coated and uncoated samples with different alloys and different times of exposure were studied by scanning electron microscopy (SEM), energy dispersive x-ray analysis (EDX), X-ray diffraction (XRD) and light optical microscopy (LOM). The corrosive environment was also simulated by Thermo-Calc software.The results showed that a nickel alloy coating can dramatically reduce the corrosion rate. The corrosion rate of the low alloy steel tubes, steel 16Mo3, was linear and the oxide scale non-protective, but the corrosion rate of the nickel-based alloy was probably parabolic and the oxide much more protective. The nickel alloy and stainless steels showed good corrosion protection behavior in the boiler. This indicates that stainless steels could be a good (and less expensive) alternative to nickel-based alloys for protecting furnace walls.The nickel alloy coated tubes (and probe samples) were attacked by a potassium-lead combination leading to the formation of non-protective potassium lead chromate. The low alloy steel tubes corroded by chloride attack. Stainless steels were attacked by a combination of chlorides and potassium-lead.The Thermo-Calc modelling showed chlorine gas exists at extremely low levels (less than 0.1 ppm) at the tube surface; instead the hydrated form is thermodynamically favoured, i.e. gaseous hydrogen chloride. Consequently chlorine can attack low alloy steels by gaseous hydrogen chloride rather than chlorine gas as previously proposed. This is a smaller molecule than chlorine which could easily diffuse through a defect oxide of the type formed on the steel." @default.
• W68521710 created "2016-06-24" @default.
• W68521710 creator A5038143641 @default.
• W68521710 creator A5041762306 @default.
• W68521710 date "2013-01-01" @default.
• W68521710 modified "2023-09-27" @default.
• W68521710 title "Initial Corrosion of Waterwalls Materials in a Waste Wood Fired Power Plant" @default.
• W68521710 hasPublicationYear "2013" @default.
• W68521710 type Work @default.
• W68521710 sameAs 68521710 @default.
• W68521710 citedByCount "1" @default.
• W68521710 countsByYear W685217102013 @default.
• W68521710 crossrefType "journal-article" @default.
• W68521710 hasAuthorship W68521710A5038143641 @default.
• W68521710 hasAuthorship W68521710A5041762306 @default.
• W68521710 hasConcept C105923489 @default.
• W68521710 hasConcept C119599485 @default.
• W68521710 hasConcept C127413603 @default.
• W68521710 hasConcept C130751788 @default.
• W68521710 hasConcept C167206829 @default.
• W68521710 hasConcept C178790620 @default.
• W68521710 hasConcept C185592680 @default.
• W68521710 hasConcept C191897082 @default.
• W68521710 hasConcept C192562407 @default.
• W68521710 hasConcept C20625102 @default.
• W68521710 hasConcept C2780013297 @default.
• W68521710 hasConcept C2781099003 @default.
• W68521710 hasConcept C39432304 @default.
• W68521710 hasConcept C4311470 @default.
• W68521710 hasConcept C548081761 @default.
• W68521710 hasConceptScore W68521710C105923489 @default.
• W68521710 hasConceptScore W68521710C119599485 @default.
• W68521710 hasConceptScore W68521710C127413603 @default.
• W68521710 hasConceptScore W68521710C130751788 @default.
• W68521710 hasConceptScore W68521710C167206829 @default.
• W68521710 hasConceptScore W68521710C178790620 @default.
• W68521710 hasConceptScore W68521710C185592680 @default.
• W68521710 hasConceptScore W68521710C191897082 @default.
• W68521710 hasConceptScore W68521710C192562407 @default.
• W68521710 hasConceptScore W68521710C20625102 @default.
• W68521710 hasConceptScore W68521710C2780013297 @default.
• W68521710 hasConceptScore W68521710C2781099003 @default.
• W68521710 hasConceptScore W68521710C39432304 @default.
• W68521710 hasConceptScore W68521710C4311470 @default.
• W68521710 hasConceptScore W68521710C548081761 @default.
• W68521710 hasLocation W685217101 @default.
• W68521710 hasOpenAccess W68521710 @default.
• W68521710 hasPrimaryLocation W685217101 @default.
• W68521710 hasRelatedWork W106057270 @default.
• W68521710 hasRelatedWork W1986212327 @default.
• W68521710 hasRelatedWork W1994269521 @default.
• W68521710 hasRelatedWork W2013841343 @default.
• W68521710 hasRelatedWork W2015207117 @default.
• W68521710 hasRelatedWork W2021568278 @default.
• W68521710 hasRelatedWork W2039509893 @default.
• W68521710 hasRelatedWork W2046763661 @default.
• W68521710 hasRelatedWork W2055336194 @default.
• W68521710 hasRelatedWork W2076124669 @default.
• W68521710 hasRelatedWork W2155977011 @default.
• W68521710 hasRelatedWork W2160255208 @default.
• W68521710 hasRelatedWork W2526587158 @default.
• W68521710 hasRelatedWork W2587086098 @default.
• W68521710 hasRelatedWork W2932669117 @default.
• W68521710 hasRelatedWork W2991310197 @default.
• W68521710 hasRelatedWork W3137073617 @default.
• W68521710 hasRelatedWork W334060818 @default.
• W68521710 hasRelatedWork W343172776 @default.
• W68521710 hasRelatedWork W2551163365 @default.
• W68521710 isParatext "false" @default.
• W68521710 isRetracted "false" @default.
• W68521710 magId "68521710" @default.
• W68521710 workType "article" @default.