| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Varis, Tommi
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (54/54 displayed)
- 2024Wear and corrosion of HVAF and HVOF sprayed WC-CoCr coatings on aluminium alloycitations
- 2023Tribological properties of plasma sprayed Cr2O3, Cr2O3–TiO2, Cr2O3–Al2O3 and Cr2O3–ZrO2 coatingscitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2023Evolution of alumina phase structure in thermal plasma processingcitations
- 2023Enhancing the cavitation erosion resistance of AISI 420-type stainless steel with quenching and partitioningcitations
- 2023On the Applicability of Iron-Based Coatings Against Abrasion and Cavitation Erosion Wearcitations
- 2023Effect of heat treatments on the wear resistance of HVAF and HVOF sprayed tool steel coatingscitations
- 2022On the applicability of iron-based alloy coatings to different wear conditionscitations
- 2021Tribological properties of plasma sprayed Cr2O3, Cr2O3–TiO2, Cr2O3–Al2O3 and Cr2O3–ZrO2 coatingscitations
- 2021Approaches for Linking the High Kinetic Thermal Spray Process, Residual Stresses and Coating Performance by Utilizing In-situ Monitoring
- 2020Evaluation of Residual Stresses and Their Influence on Cavitation Erosion Resistance of High Kinetic HVOF and HVAF-Sprayed WC-CoCr Coatingscitations
- 2020Influence of powder properties on residual stresses formed in high-pressure liquid fuel HVOF sprayed WC-CoCr coatingscitations
- 2020Corrosion Properties of Thermally Sprayed Bond Coatings Under Plasma-Sprayed Chromia Coating in Sulfuric Acid Solutionscitations
- 2019Corrosion properties of thermally sprayed bond coatings under plasma sprayed chromia coating in sulfuric acid solutions
- 2016Optimization of HVOF Cr3C2-NiCr coating for increased fatigue performancecitations
- 2015High temperature corrosion of thermally sprayed NiCr and FeCr coatings covered with a KCl-K2SO4 salt mixturecitations
- 2014Damage mechanisms and cracking behavior of thermal sprayed WC-CoCr coating under scratch testingcitations
- 2014Nickel-based HVOF coatings promoting high temperature corrosion resistance of biomass-fired power plant boilerscitations
- 2014Performance testing of iron based thermally sprayed HVOF coatings in a biomass-fired fluidised bed boilercitations
- 2013Development and application of HVOF sprayed spinel protective coating for SOFC interconnectscitations
- 2013Increased lifetime for biomass and waste to energy power plant boilers with HVOF coatings:High temperature corrosion testing under chlorine-containing molten saltcitations
- 2013Materials for electronics by thermal sprayingcitations
- 2013Residual stress development in cold sprayed Al, Cu and Ti coatingscitations
- 2013Increased lifetime for biomass and waste to energy power plant boilers with HVOF coatingscitations
- 2012High temperature corrosion resistance of HVOF coatings in a NaCl-KCl-Na2SO4 salt
- 2012Optimizing NiCr thermal spray coating with process map methodology for high temperature power plant boiler application
- 2011Gas atomized thermal spray powders of various metals and alloys
- 2011Hexaferrite/polyethylene Composite coatings prepared with flame sprayingcitations
- 2010Nano-sized and sub-micron carbide powders for thermal spraying
- 2010MnCo2O4 spinel chromium barrier coatigns coatings for SOFC interconnect by HVOF
- 2009The effect of microstructure on mechanical properties of HVOF sprayed WC-CoCr composite coatings
- 2009Behavior of HVOF WC-10Co4Cr Coatings with Different Carbide Size in Fine and Coarse Particle Abrasioncitations
- 2008Influence of the elementary mixing scale on HVOF-sprayed coatings derived from nanostructured aluminosilicate/mullite feedstockcitations
- 2007Application of HVOF techniques for spraying of ceramic coatings
- 2007Coating integrated optical fibres for monitoring of boiler heat transfer surfacescitations
- 2007Nanostructured ceramic HVOF coatings for improved protection
- 2007Comparison between plasma- and HVOF-sprayed ceramic coatings:Part I: microstructure and mechanical propertiescitations
- 2007Comparison between plasma- and HVOF-sprayed ceramic coatings:Part II: tribological behaviourcitations
- 2007Hot corrosion and erosion resistance of new coating alloys for biomass and waste boiler heat transfer surfaces
- 2006On the role of particle state and deposition procedure on mechanical, tribological and dielectric response of high velocity oxy-fuel sprayed alumina coatingscitations
- 2006Improved mechanical properties by nanoreinforced HVOF-sprayed ceramic composite coatings
- 2006Process optimization for nanostructured HVOF -sprayed Al2O 3-based ceramic coatings
- 2006Process optimization for nanostructured HVOF-sprayed Al2O3-based ceramic coatingscitations
- 2006Development of nanostructured Al2O3-Ni HVOF coatingscitations
- 2006Parameter optimization of HVOF sprayed nanostructured alumina and alumina-nickel composite coatingscitations
- 2006Combination of protective coating and temperature monitoring in boilers
- 2006Wear behaviour of APS and HVOF sprayed ceramic coatings
- 2006Wear behaviour of APS and HVOF sprayed ceramic coatings
- 2006Process optimization for nanostructured HVOF -sprayed Al2O3-based ceramic coatingscitations
- 2006Development of nanostructured Al2O3-NiHVOFcoatings
- 2005Process optimization and performance of nanoreinforced HVOF-sprayed ceramic coatings
- 2004The on-site manufacturing of thermally sprayed coatings
- 2003Sealing of thermally sprayed coatings
- 2000Using IR-thermography as a quality-control tool for thermal spraying in the aircraft industry
Places of action
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article
High temperature corrosion of thermally sprayed NiCr and FeCr coatings covered with a KCl-K2SO4 salt mixture
Abstract
Current boiler tube materials and designs are sensitive to changes in process conditions. The desire to increase efficiency through the increase in process temperature and the use of high-chlorine and alkali containing fuels such as biomass is challenging. The alloying of steel to increase the corrosion resistance leads to a significant increase in cost. Thermally sprayed coatings offer promising, effective, flexible and cost efficient solution to fulfil the material needs for the future. However, some heat exchanger design alterations have to be overcome before global commercialization. High temperature corrosion in combustion plants can occur by a variety of mechanisms, including passive scale degradation with subsequent rapid scaling, loss of adhesion and scale detachment, attack by molten or partly molten deposits via fluxing reactions and intergranular/interlamellar corrosion. The activated chlorine corrosion mechanism plays a key role in the thermally sprayed coatings due to their unique lamellar structure. In this study, the corrosion behaviour of NiCr and FeCr (HVOF and wire arc) thermally sprayed coatings was tested under simplified biomass combustion conditions. The tests were carried out by using a KCl-K2SO4 salt mixture as a synthetic biomass ash, which was placed on the coated materials and then heat treated for one week (168 h) at two different temperatures (550 °C and 600 °C) and in two different gas atmospheres (air and air + 30% H2O). After exposure, the metallographic cross sections of the coatings were studied with SEM/EDX. The results showed that the coatings behaved relatively well at the lower test temperature while critical interlamellar corrosion was observed in some cases at the higher test temperature. A few coatings (HVOF Ni49Cr, HVOF Ni21Cr, and wire arc sprayed Fe30Cr) showed promising performance even at 600 °C in both atmospheres (dry and wet).