Electrochemical Study of Ni20Cr Coatings Applied by HVOF Process in ZnCl<sub>2</sub>-KCl at High Temperatures

Porcayo-Calderón, J.; Sotelo-Mazón, O.; Casales-Díaz, M.; Ascencio-Gutiérrez, J. A.; Salinas-Bravo, V. M.; Martínez-Gómez, L.

doi:10.1155/2014/503618

Cited by 16 publications

(17 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…observed in Inconel 600 in molten NaCl-KCl is due to the high Fe content in this alloy. Studies with Ni20Cr coatings in Cl-rich molten salts do not show any internal damage such as that observed here[13,14]. The corrosion resistance of Inconel 600 is due to the growth of a protective layer of Cr 2 O 3 on its surface.…”

supporting

confidence: 58%

“…However, on the other hand it has also been suggested that the NiCr-based alloys show better performance than Fe-base alloys. This combined effect has been established in other studies [9][10][11][12][13][14]. This work addresses the corrosion resistance of Inconel 600 in NaCl-KCl mixture (1 : 1 M) at 700, 800, and 900 ∘ C for 100 hours in static air.…”

Section: Introductionmentioning

confidence: 53%

See 1 more Smart Citation

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

Salinas-Solano

Porcayo-Calderón

Salinas-Bravo

et al. 2014

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

In this work the corrosion resistance of a high content nickel alloy, Inconel 600, was investigated in mixed NaCl-KCl salts at 700, 800, and 900°C for 100 hours in static air. Investigation was carried out using electrochemical techniques such as polarization curves, rest potential measurements, linear polarization resistance, and electrochemical impedance spectroscopy. Corroded specimens were analyzed by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS). Electrochemical measurements showed an increased degradation rate of Inconel 600 with increasing test temperature. SEM and EDS analysis show that the damage experienced by Inconel 600 is greater than that determined by electrochemical measurements. This damage was identified as internal corrosion due to the reaction of Cl2with the alloying elements (Cr and Fe); however, at 900°C the internal damage was minor and it was associated with the nickel content in the alloy.

show abstract

supporting

confidence: 58%

Section: Introductionmentioning

confidence: 53%

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

Salinas-Solano

Porcayo-Calderón

Salinas-Bravo

et al. 2014

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Similar depletion processes have been reported in studies of corrosion by molten salts [81][82][83][84][85]. Figure 11 shows the surface morphology of the oxides formed at 900°C.…”

Section: Sem Analysissupporting

confidence: 79%

Effect of the Noble Metals Addition on the Oxidation Behavior of Ni₃Al

Ramos-Hernández

Porcayo-Calderón

Mayén³

et al. 2018

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

is paper discusses the effect of the addition of noble metals on the microstructure, mechanism, and oxidation kinetics of the Ni 3 Al intermetallic alloy. Ni 3 Al was doped with 1% (atomic percent) of Au, Ag, Pd, and Pt. Oxidation behavior of the alloys was evaluated at 900, 1000, and 1100°C in O 2 for 24 hours. XRD analysis showed that the addition of noble metals favored the oxide growth on preferential crystallographic planes. In addition, the preferential substitution of the noble metals in the Ni 3 Al structure modifies the surface composition by increasing the Al/Ni ratio. It was observed that most of the alloys showed a subparabolic behavior, and only the intermetallic base and the alloy doped with Ag show a parabolic behavior at 900°C. e developed oxides were analyzed both superficially and in cross section by scanning electron microscopy (SEM) and energy dispersive X-ray analysis (EDXA). It was evident that only the intermetallic base showed the formation of a duplex oxide scale (Al 2 O 3 /NiO). e alloys doped with noble metals showed the oxide growth practically of pure Al 2 O 3 . is was due to a decrease in the diffusion of the Ni cations because of the presence of the noble metals in the crystalline structure.

show abstract

“…Ni-Cr systems have also been studied as protective coatings; nickel and chromium form highly stable oxides when exposed to an oxidizing environment, providing high resistance to aggressive media. A thorough study was conducted by Porcayo-Calderon [106,107] on the performance of Ni20Cr coating deposited by HVOF and combustion powder spray processes with chloride salts. Regarding the chloride salt, the authors observed that coating performed better than the uncoated stainless steel 304 substrate, especially at high temperature.…”

Section: Corrosion Resistant Coatings In Tes Systemmentioning

confidence: 99%

“…However, corrosion protection in molten salts does not only depend on the material per se, or on the morphology of the manufactured coating, but is strongly influenced by the chemical stability of the metallic element and their compounds, such as oxides and chlorides. Contributions of [106,107] provide a beneficial understanding of the behavior of Ni-, Cr-and Fe-based alloy and open the way to further improvements related to the investigation of coating stability at higher operating temperatures (closer to the CSP regime) and the optimization of the thermal spray deposition.…”

Section: Corrosion Resistant Coatings In Tes Systemmentioning

confidence: 99%

Thermal Spray Processes in Concentrating Solar Power Technology

Rubino

Poza

Pasquino

et al. 2021

Metals

View full text Add to dashboard Cite

Solar power is a sustainable and affordable source of energy, and has gained interest from academies, companies, and government institutions as a potential and efficient alternative for next-generation energy production. To promote the penetration of solar power in the energy market, solar-generated electricity needs to be cost-competitive with fossil fuels and other renewables. Development of new materials for solar absorbers able to collect a higher fraction of solar radiation and work at higher temperatures, together with improved design of thermal energy storage systems and components, have been addressed as strategies for increasing the efficiency of solar power plants, offering dispatchable energy and adapting the electricity production to the curve demand. Manufacturing of concentrating solar power components greatly affects their performance and durability and, thus, the global efficiency of solar power plants. The development of viable, sustainable, and efficient manufacturing procedures and processes became key aspects within the breakthrough strategies of solar power technologies. This paper provides an outlook on the application of thermal spray processes to produce selective solar absorbing coatings in solar tower receivers and high-temperature protective barriers as strategies to mitigate the corrosion of concentrating solar power and thermal energy storage components when exposed to aggressive media during service life.

show abstract

Electrochemical Study of Ni20Cr Coatings Applied by HVOF Process in ZnCl₂-KCl at High Temperatures

Cited by 16 publications

References 15 publications

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

Effect of the Noble Metals Addition on the Oxidation Behavior of Ni₃Al

Thermal Spray Processes in Concentrating Solar Power Technology

Contact Info

Product

Resources

About

Electrochemical Study of Ni20Cr Coatings Applied by HVOF Process in ZnCl2-KCl at High Temperatures

Cited by 16 publications

References 15 publications

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

High Temperature Corrosion of Inconel 600 in NaCl-KCl Molten Salts

Effect of the Noble Metals Addition on the Oxidation Behavior of Ni3Al

Thermal Spray Processes in Concentrating Solar Power Technology

Contact Info

Product

Resources

About

Electrochemical Study of Ni20Cr Coatings Applied by HVOF Process in ZnCl₂-KCl at High Temperatures

Effect of the Noble Metals Addition on the Oxidation Behavior of Ni₃Al