Surface passivation on precipitated Ti-containing multi-principal element alloy subject to metal aging

Fatemeh Asadi; Brooke Bond; Chinmoy Mahata; Ulises Martin; Marcelo Paredes; K.G. Pradeep; Lufeng Xue; Yuan Ding; Raymundo Case; Homero Castaneda

Results in Surfaces and Interfaces (Jan 2025)

Surface passivation on precipitated Ti-containing multi-principal element alloy subject to metal aging

Fatemeh Asadi,
Brooke Bond,
Chinmoy Mahata,
Ulises Martin,
Marcelo Paredes,
K.G. Pradeep,
Lufeng Xue,
Yuan Ding,
Raymundo Case,
Homero Castaneda

Affiliations

Fatemeh Asadi: Department of Ocean Engineering, Texas A&M University, Galveston, TX 77554, USA
Brooke Bond: Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA
Chinmoy Mahata: Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India
Ulises Martin: Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA
Marcelo Paredes: Department of Ocean Engineering, Texas A&M University, Galveston, TX 77554, USA; Corresponding author.
K.G. Pradeep: Department of Metallurgical and Materials Engineering, Indian Institute of Technology Madras, Chennai 600036, India
Lufeng Xue: Department of Ocean Engineering, Texas A&M University, Galveston, TX 77554, USA; School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China; Yangtze Delta Region Academy of Beijing Institute of Technology, Jiaxing 314019, China
Yuan Ding: Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA
Raymundo Case: Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA
Homero Castaneda: Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77840, USA

Journal volume & issue: Vol. 18
p. 100405

Abstract

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Surface passivation on precipitated Ti-containing multi-principal element Alloys (MPEA) is studied in saline solutions with different concentrations and different temperatures. The selected system alloy is Al2Ti5Fe53Ni35Cu5 at.% which has been solution heat treated at 530 °C for 3h (CONFIG 2) and for 10h (CONFIG 3) from the as-received configuration (CONFIG 1). The potentiodynamic polarization (PDP) test specifies that the corrosion resistance of aged Ti-containing alloys decreases as a function of aging time, while the as-received configuration reflects a nobler behavior. Microcapillary technique supports these findings by probing FCC grain passivity at the microscale level aiming at the core of the grain. Local PDP reveals that the potential of CONFIG 1 grain is sensitive to the chloride concentrations whereas it is almost independent in the remaining configurations suggesting that the weakest link is elsewhere. Profilometer analysis shows that microgalvanic processes take place between grains and boundaries having both anode- and cathode-like behavior interchangeably.

Published in Results in Surfaces and Interfaces

ISSN: 2666-8459 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Chemical technology: Industrial electrochemistry
Website: https://www.journals.elsevier.com/results-in-surfaces-and-interfaces

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