Combined Slurry and Cavitation Erosion Resistance of Hvof Thermal Spray Coated Stainless Steel

Amarendra, H. J.; Prathap, M.S.; Karthik, S.; Darshan, B.M.; Devaraj,; Girish, P.C.; runa, V.T.

doi:10.1016/j.matpr.2017.01.046

Cited by 27 publications

(12 citation statements)

References 15 publications

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“…Some researchers also investigated the effect of nanoreinforcement mixed with micron-size base material. 8,9 The results showed better hardness with lesser porosity and higher erosion resistance offered by the coated surface in comparison with the uncoated surface. For the preparation of composite coating, alumina (Al 2 O 3 ) is a commonly used reinforced coating powder in combination with other coating powders, generally with Titania (TiO 2 ) and Zirconia (ZrO 2 ).…”

Section: Introductionmentioning

confidence: 93%

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment

Sharma

Kaur

Bhandari

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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Hydro turbine components are subjected to severe erosion especially during the rainy season in the Himalayan region. To protect the CA6NM turbine steel, an attempt has been made to develop the Ni-40Al2O3 composite coating using a high-velocity flame spray process. To lower the porosity, the coating was developed by mixing two different sizes (viz. micron and nano) of alumina (Al2O3) reinforcement with 60 wt.% Ni as the base powder. The characterization of the as-sprayed coating was done by scanning electron microscopy/energy dispersive X-ray spectroscopy, and PANalytical X-ray diffraction technique, whereas mechanical characterization was done for the evaluation of microhardness, bond strength, and surface roughness. The performance of the developed coating was compared with uncoated steel on slurry jet erosion test rig under accelerated conditions by varying the three parameters, viz. slurry concentration, erodent size, and impact velocity. Ni-40Al2O3 coating was found to be effective for minimizing the erosion rate in comparison with the uncoated steel. Scanning electron microscopy of eroded coatings mainly reveals the brittle type of signature on the coating.

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Section: Introductionmentioning

confidence: 93%

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment

Sharma

Kaur

Bhandari

2019

Proceedings of the Institution of Mechanical Engineers, Part J:

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“…Nanostructured Ni-Cr coating offered better erosion-corrosion (E-C) resistance under actual boiler conditions due to the presence of protective NiO and Cr2O3 phases in their oxide scales and its superior as-sprayed microhardness. However, in conventional Ni-Cr coating, it was observed that there was an increase in weight loss with increase in sand particle size and duration of the test showed good cavitation erosion resistance [20,113]. Nanostructured WC-based and Cr3C2-25NiCr coating showed low erosion-corrosion and erosion-wear compared to conventional coatings corresponding to highest microhardness value, lower porosity, higher fracture toughness, and lower roughness [6,19,21].…”

Section: Aisi 1018 Steel Erosion Corrosion Test Potentiodynamic Polarmentioning

confidence: 97%

Nanocrystalline Cermet Coatings for Erosion–Corrosion Protection

et al. 2019

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The processing techniques, microstructural characteristics, and erosion corrosion behaviour of Cr3C2–NiCr and tungsten carbide (WC)-based cermet coatings are reviewed in this work. Conventional and nanocrystalline Cr3C2–NiCr and WC-based cermet coatings are generally synthesized using thermal spray technique. The wear, erosion, and corrosion protection ability of conventional and nanocermet coatings are compared based on available literature. In Cr3C2–NiCr coatings, the corrosion resistance is offered by NiCr metal matrix while the wear resistance is provided by the carbide ceramic phase, making it suitable for erosion–corrosion protection. The nanocrystalline cermet coatings exhibits better erosion–corrosion resistance as compared to the conventional coatings. The nanocrystalline coatings reduces the erosion–corrosion rate significantly compared to conventional coatings. It is attributed to the presence of the protective NiCr metallic binder that allows easier and faster re-passivation when the coating is subjected to wear and the fine-grain structure with homogeneous distribution of the skeleton network of hard carbide phases. In addition, corrosion-accelerated erosion dominates the reaction mechanism of erosion–corrosion and, therefore, higher hardness, strength, and better wear resistance of nanocermet coating along with its faster repassivation kinetics accounts for improved corrosion resistance as compared to conventional coatings.

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“…Erosion mechanism was mixed (ductile + brittle). Material loss was increased by introducing cavitation inducers [38]. Titania (TiO 2 ) coating was applied on mild steel substrate by HVOF thermal spray process and erosion-corrosion behavior was studied and compared.…”

Section: Effects Of Thermal Spray Coatingsmentioning

confidence: 99%

Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

Kumar

Singh

et al. 2018

Tribology Online

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This literature study is based on the research work conducted in the field of erosion behavior of steel alloys. The focus is on the surface modification of the steel alloys by heat treatment, surface hardening and surface coating methods. Laser cladding and laser hardening processes are also explained. The influence of tribological parameters on the erosion is explained. Steel alloys are chosen because of a wide number of applications due to their excellent properties. Efforts have been made to understand the cause and the remedial action towards the improvements in wear performance. Suitable surface treatment method on the steel alloys may definitely do this work but there should be a need of proper control over the process parameters. The environmental conditions of the laboratory are differing from the real working environment. Hence, the results which are satisfactory at the laboratory are not doing well in real place of application.

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Combined Slurry and Cavitation Erosion Resistance of Hvof Thermal Spray Coated Stainless Steel

Cited by 27 publications

References 15 publications

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment

Nanocrystalline Cermet Coatings for Erosion–Corrosion Protection

Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

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Combined Slurry and Cavitation Erosion Resistance of Hvof Thermal Spray Coated Stainless Steel

Cited by 27 publications

References 15 publications

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al2O3 coating in aggressive environment

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al2O3 coating in aggressive environment

Nanocrystalline Cermet Coatings for Erosion–Corrosion Protection

Influence of Surface Treatments on Erosion Behavior of Various Steel Alloys- A Literature Review

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Product

Resources

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Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment

Slurry jet erosion performance of high-velocity flame-sprayed nano mixed Ni-40Al₂O₃ coating in aggressive environment