A5014283308- High-Temperature Coating Behaviors
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Metal Alloys Wear and Properties
- Materials Engineering and Processing
- Advanced ceramic materials synthesis
- Advancements in Materials Engineering
- Integrated Water Resources Management
- Material Properties and Applications
- Nuclear Materials and Properties
- Diamond and Carbon-based Materials Research
- Metallurgical Processes and Thermodynamics
- Technical Engine Diagnostics and Monitoring
- Surface Treatment and Coatings
- High Entropy Alloys Studies
Research and Testing Institute Plzen (Czechia)
2019-2023
This study is focused on the high-temperature corrosion evaluation of selected thermally sprayed coatings. NiCoCrAlYHfSi, NiCoCrAlY, NiCoCrAlTaReY, and CoCrAlYTaCSi coatings were base material 1.4923. used as a cost-efficient construction for components power equipment. All evaluated using HP/HVOF (High-Pressure/High-Velocity Oxygen Fuel) technology. High-temperature testing was performed in molten salt environment typical coal-fired boilers. exposed to 75% Na2SO4 25% NaCl at temperature 800...
In order to extend the life of boilers by applying an anti-corrosion coating without need dismantle them, it is advisable find coatings that can be applied using cheaper and portable techniques, such as Twin Wire Arc Spray technology (TWAS). this study, we compare selected NiCr-based two uncoated steel substrates (steel 1.7715 1.4903). Two coatings, Cr3C2 - 25% NiCr Hastelloy C-276 are deposited High velocity oxygen-fuel (HVOF) three NiCrTi, NiCrMo, Inconel 625, TWAS. addition corrosion...
Abstract High temperature corrosion in a molten sodium sulfate salt environment is serious problem of coal-fired boiler components. The promising possibility for surface protection to apply thermally sprayed coatings. However, the key success choose optimal material and proper spraying technology given application. Therefore, this study aimed at comparison high behaviour two protecting NiCr-based coatings by different technologies on 1.4903 (W.nr.) chrome-molybdenum steel. NiCrMoWFe was...
Abstract The NiCr coatings, deposited by modern Cold Spray technology, and well-established Twin Wire Arc Spraying High Velocity Oxygen Fuel technologies, was studied in terms of microstructure, mechanical, tribological corrosion properties. Compared to other thermal spraying CS coatings achieve higher cohesive strength associated dense structure is responsible for the coatings’ high protection ability. influence technological parameters found negligible, except usage nozzle internal...
Increasing interest for industrial use of thermally sprayed coatings leads to development in most thermal spraying technologies, including atmospheric plasma (APS). The latest cascaded torch SinplexPro from Oerlikon Metco incorporates the efficiency advantages arc technology into a single-cathode spray gun. It more stable across wide range gas flows, mixtures and pressures also highly increases powder throughput. Thermal molybdenum are widely used improving wear resistance sliding properties...
The components of rail vehicles are strained by a number sources, whether operational, natural, or effects caused passengers.For protection against these influences, the types surface is frequently used.The project called "Increasing resistance means modern thermal spraying technologies" deals with improving performance and service life vehicle spraying.In project, more than ten selected for coating different material sprayed methods spraying.This paper focused on made Twin Wire Arc...
Abstract This study evaluates the hot corrosion behavior of NiCoCrAlY, NiCoCrAlYHfSi, NiCoCrAlTaReY, and CoCrAlYTaCSi coatings on 1.4923 stainless steel, applied by high-pressure HVOF spraying. All were cycled in an environment Na2SO4 82% Fe2(SO4)3 at 690 °C. Each cycle consisted 1 h heating a silicon carbide tube furnace followed 20 min cooling. Weight change measurements performed after each to track kinetics, SEM EDS analysis employed analyze mechanism. showed best resistance tested.
Abstract This paper concerns the combined influence of spraying parameters and heat flux level during atmospheric plasma process commercial alumina-titania coating. One main industrial application are wear abrasion resistant protective thermally sprayed coatings. Commercial high throughput torch with cascaded construction is used as equipment. Three sets were for basic evaluation their influence. Additionally, three levels input added to some those parameters. Those called “cold”, “hot”...
Abstract TWAS technology is established and widely used in practice for spraying metal alloy-based coatings, benefiting from the low cost of device mobility, enabling application coatings even on large structures without need disassembly. properties performance depends not only chosen type material but also deposition process parameters, which must be carefully so that resulting coating meet expectations. This paper presents results parameters optimization study, obtained using...
The wear resistant Mo coatings were deposited using SmartArc Electric Arc Wire Spray System and advanced SinplexPro high throughput atmospheric plasma spray gun. analyzed in terms of microstructure, mechanical properties tribological characteristics, including rate mechanism. It was shown that despite the differences deposition process principles, don’t differ with respect to their functional properties. Both reached comparable hardness, microhardness, resistance coefficient friction....
Atmospheric plasma sprayed (APS) chromia coating provides excellent wear behaviour combined with corrosion resistance even in aggressive environments.In this paper, the influence of variable spraying parameters on mechanical properties and microstructure coatings is investigated.Main goal for optimization to achieve high abrasive resistance.APS ceramic such as could perform some industrial applications well more commonly used HVOF (high velocity oxygen fuel) cermet coatings, especially...
The thermal spray technologies are versatile methods of deposition thick coatings on the components surfaces.Based spraying technology principle, various materials and coating thicknesses can be deposited.Some technologies, as mobile systems, have capability to used directly on-site.Typically, Twin Wire Arc Spraying systems (TWAS) utilized large-scale constructions protect them from corrosion.Also, one latest Cold Spray, is nowadays being developed serve system.Both offer possibility up...
The paper focuses on the evaluation of ability selected heat sprayed coatings to protect surface component in an environment simulating a geothermal turbine.The subject testing were based hardmetals, applied by HVOF technology (WC-CoCr, Cr3C2-NiCr) and Fe Ni alloys, (NiCr, FeCrAlY) TWAS (FeCrAlNiC, FeCr, NiCr) technologies.It has been shown that although provide higher protective properties terms both corrosion resistance mechanical influences, it is also possible apply coating with if...
High velocity oxy-fuel spraying (HVOF) being one of thermal techniques, is deployed in many commercial applications mostly for very hard wear and/or corrosion resistant coatings.Supersonic speed the jet combined with temperatures around 5500 K utilized to spray most metals, metallic alloys, cermets and superalloys [1][2][3].Typical HVOF coatings are compact, dense, low porosity, moderate oxidation level high bonding strength substrate [1].Cermets standardly commercially applied materials,...
High temperature corrosion is a serious problem related to the combustion of heavy oils with high vanadium contents.Protective overlay coatings are used allow functioning engineering components under extreme conditions and provide resistance extend component life.This article concerned behaviour two protective NiCr-based bare structural steel 1.4959 (W.nr.) in molten salt environment 40% Na2SO4 60% V2O5 at 750 °C cyclic condition.NiCr NiCrMoNbTa coating was deposited on 1.4903 by Twin wire...