Detail publikačního výsledku

Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

MORAVČÍK, I.; PEIGHAMBARDOUST, N.; MOTALLEBZADEH, A.; MORAVČÍKOVA DE ALMEIDA GOUVÊA, L.; LIU, C.; PRABHAKAR, J.; DLOUHÝ, I.; LI, Z.

Originální název

Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

Anglický název

Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution

Druh

Článek WoS

Originální abstrakt

The corrosion resistance of the equiatomic CoCrNi medium-entropy alloy (MEA) and its 0.5 atomic % nitrogen alloyed variant in 0.1 M H2SO4 solution was investigated and compared with that of the 316 L stainless steel as a reference material. All of the investigated materials showed single-phase face centered cubic (FCC) microstructures, and nitrogen was fully dissolved in the solid solution structure of the CoCrNi MEA. Both the nitrogen-free and nitrogen-doped MEAs showed significantly higher corrosion resistance (lower corrosion currents and rates) than the 316 L steel. Compared to the nitrogen-free CoCrNi, the interstitial nitrogen dissolved in solid solution causes a significant improvement in the pitting corrosion resistance of the CoCrNiN. Under the same testing condition, pitting corrosion was not observed in the CoCrNiN alloy, while the CoCrNi MEA and 316 L steel showed distinct pitting cavities. The better anti-corrosion performance of the CoCrNiN compared to that of the CoCrNi is correlated with a higher fraction of chromium oxide in the passive films.

Anglický abstrakt

The corrosion resistance of the equiatomic CoCrNi medium-entropy alloy (MEA) and its 0.5 atomic % nitrogen alloyed variant in 0.1 M H2SO4 solution was investigated and compared with that of the 316 L stainless steel as a reference material. All of the investigated materials showed single-phase face centered cubic (FCC) microstructures, and nitrogen was fully dissolved in the solid solution structure of the CoCrNi MEA. Both the nitrogen-free and nitrogen-doped MEAs showed significantly higher corrosion resistance (lower corrosion currents and rates) than the 316 L steel. Compared to the nitrogen-free CoCrNi, the interstitial nitrogen dissolved in solid solution causes a significant improvement in the pitting corrosion resistance of the CoCrNiN. Under the same testing condition, pitting corrosion was not observed in the CoCrNiN alloy, while the CoCrNi MEA and 316 L steel showed distinct pitting cavities. The better anti-corrosion performance of the CoCrNiN compared to that of the CoCrNi is correlated with a higher fraction of chromium oxide in the passive films.

Klíčová slova

Electrochemical properties; Medium–entropy alloys; Interstitials; Microalloying; Corrosion; Nanoindentation

Klíčová slova v angličtině

Electrochemical properties; Medium–entropy alloys; Interstitials; Microalloying; Corrosion; Nanoindentation

Autoři

MORAVČÍK, I.; PEIGHAMBARDOUST, N.; MOTALLEBZADEH, A.; MORAVČÍKOVA DE ALMEIDA GOUVÊA, L.; LIU, C.; PRABHAKAR, J.; DLOUHÝ, I.; LI, Z.

Rok RIV

2021

Vydáno

01.02.2021

Nakladatel

Elsevier

Místo

ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, USA, NY, 10010-1710

ISSN

1044-5803

Periodikum

Materials characterization

Svazek

172

Číslo

110869

Stát

Spojené státy americké

Strany od

1

Strany do

10

Strany počet

10

URL

https://www.sciencedirect.com/science/article/pii/S1044580320323408

BibTex

@article{BUT167484,
  author="Igor {Moravčík} and Naeimeh Sadat {Peighambardoust} and Amir {Motallebzadeh} and Larissa {Moravčíková de Almeida Gouvea} and Chang {Liu} and J. Manoj {Prabhakar} and Ivo {Dlouhý} and Zhiming {Li}",
  title="Interstitial nitrogen enhances corrosion resistance of an equiatomic CoCrNi medium-entropy alloy in sulfuric acid solution",
  journal="Materials characterization",
  year="2021",
  volume="172",
  number="110869",
  pages="1--10",
  doi="10.1016/j.matchar.2020.110869",
  issn="1044-5803",
  url="https://www.sciencedirect.com/science/article/pii/S1044580320323408"
}

Dokumenty

Moravcik_Materials Characterisation
Moravcik_Mater Characterisation_citace