resistance of thermally sprayed coatings in an environment simulating a turbine of geotermal power plant

Houdková, Šárka; Vostřák, Marek; Lencová, Kateřina; Šulcová, Petra; Duliškovič, Josef

doi:10.37904/metal.2021.4188

Cited by 1 publication

(5 citation statements)

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“…More recently in the work of Houdkova et al., [ 142 ] two types of cermets deposited by HVOF, WC‐CoCr, and Cr 3 C 2 ‐NiCr, were tested for corrosion protection of carbon steel for geothermal steam turbine applications, alongside other Ni‐ and Fe‐based alloys, also deposited by HVOF as well as TWAS methods. The coatings were exposed in autoclave for 105 days in a simulated geothermal brine rich in chloride ions and CO 2 , of pH 3.5–4, 250 °C temperature, and 12 bar pressure.…”

Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

“…Three Fe‐based alloys, Cr 18.09 Ni 17.9 C 4.62 Al 2.06 V 2 Si 0.25 Fe 55.05 , Cr 13 Fe 87 , and Cr 24 Al 8 Y 0.5 Fe 67.5 , were also deposited by TWAS and HVOF for corrosion mitigation of carbon steel in steam turbines by Houdkova et al. [ 142 ] The coatings, deposited to thicknesses in the range 369–537 µm, were subjected to 105 days exposure in a simulated geothermal brine containing Cl − ions and CO 2 , of pH‐3.5–4, 250 °C, and 12 bar. Mechanical performance tests were also performed, together with standard microstructural examination.…”

Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

“…More recently, in the study of Houdkova et al., [ 142 ] two Ni‐based alloys, both of the Cr 20 Ni 80 type, were deposited by Twin wire arc spray (TWAS) and HVOF over carbon steel for corrosion mitigation of steam turbine components. [ 142 ] The coatings were tested in simulated geothermal brine containing Cl − ions and CO 2 for 105 days, followed by standard microstructural and visual examination and further mechanical tests. Among the tested coatings, the two Ni alloy specimens performed satisfactorily, with no indicative signs of corrosion damage, although the alloys were not listed as the best‐performing ones.…”

Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

“…Several electroplated Ni-based coatings were applied by Salvago et al, [160] onto AISI 4137-H steel for sulfide stress corrosion cracking (SSC) mitigation of drill tool joints in the Larderello geothermal area (Italy). Different coating compositions: Ni, Ni-S, [142] Copyright 2021, Tanger Ltd.…”

Section: Coatingsmentioning

confidence: 99%

mentioning

confidence: 99%

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Research and Development on Coatings and Paints for Geothermal Environments: A Review

Fanicchia,

Karlsdottir

2023

Adv Materials Technologies

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Geothermal power plants are complex systems, where the interplay between different metallic components transforms the enthalpy of hot brine in the form of electricity or usable heated water. The naturally occurring variety in brine chemistry, linked to the presence of specific key species, and its thermo‐physical properties, leads to the development of different power plant configurations. Key species and power plant configuration in turn determine the extent of damage experienced by each component in the power plant: erosion, corrosion, and/or scaling, often acting combined. Paints and coatings, compared to changing the component alloy, have represented a preferred solution to mitigate these issues due to advantages in terms of costs and repairability. This is reflected in the large number of publications on research and development in this area within the past ≈50 years, with even an increasing trend in the past 10–20 years, indicating the strong interest to develop this clean and sustainable energy source. Therefore, in this work, the first of its kind after 1980, an in‐depth review of all published work on research performed on paints and coatings for geothermal applications, subdivided by the material system, is provided.

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Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%

Section: Review Of Paint and Coating Systemsmentioning

confidence: 99%