Effect of Temperature on the Corrosion Resistance of Ni5Al Coating Deposited by Electric Arc in 3.5% NaCl Solution

Cinthya Dinorah Arrieta-González, Francisco Javier Perez-Arizmendi, Milagros Alejandra Dorta-Leon, Jesús Porcayo-Calderón*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The electrochemical behavior of the Ni5Al coating deposited by an electric arc was evaluated. Its behavior was evaluated in a saline solution as a function of temperature (20 °C, 40 °C, and 60 °C). The variation as a function of time of the Ni5Al coating’s values of open circuit potential, linear polarization resistance, and the evolution of its electrochemical impedance spectra were analyzed. With this deposition technique, the rapid formation of thick coatings is achieved, which reduces the presence of interconnected porosity. Even though the microstructural characteristics showed the presence of trapped oxides, the electrochemical measurements carried out showed excellent corrosion resistance of the coating. The coating quickly develops a passive layer that allows it to rapidly reach thermodynamic equilibrium with the corrosive medium.

Original languageEnglish
Article number1349
JournalCoatings
Volume13
Issue number8
DOIs
StatePublished - Aug 2023

Bibliographical note

Publisher Copyright:
© 2023 by the authors.

Keywords

  • EIS
  • Ni5Al coatings
  • RPL
  • corrosion
  • electrochemical corrosion
  • passive layer

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