Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS

Yao Qiu; Ruiliang Liu; Thomas Gengenbach; Oumaïma Gharbi; Sanjay Choudhary; Sebastian Thomas; Hamish L. Fraser; Nick Birbilis

doi:10.1038/s41529-020-0112-3

Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS

Yao Qiu
, Ruiliang Liu
, Thomas Gengenbach
, Oumaïma Gharbi
, Sanjay Choudhary
, Sebastian Thomas
, Hamish L. Fraser
, Nick Birbilis^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

The real-time dissolution of the single-phase compositionally complex alloy (CCA), Al_1.5TiVCr, was studied using an inline inductively coupled plasma method. Compositionally complex alloys (CCAs), a term encompassing high entropy alloys (HEAs) or multi-principal element alloys (MPEAs), are—in general—noted for their inherently high corrosion resistance. In order to gain an insight into the dissolution of Al_1.5TiVCr alloy, atomic emission spectroelectrochemistry was utilised in order to measure the ion dissolution of the alloy during anodic polarisation. It was revealed that incongruent dissolution occurred, with preferential dissolution of Al, and essentially no dissolution of Ti, until the point of alloy breakdown. Results were correlated with X-ray photoelectron spectroscopy, which revealed a complex surface oxide inclusive of unoxidised metal, and metal oxides in disproportion to the bulk alloying element ratio.

Original language	English
Article number	7
Journal	npj Materials Degradation
Volume	4
Issue number	1
DOIs	https://doi.org/10.1038/s41529-020-0112-3
Publication status	Published - Dec 2020

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title = "Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS",

abstract = "The real-time dissolution of the single-phase compositionally complex alloy (CCA), Al1.5TiVCr, was studied using an inline inductively coupled plasma method. Compositionally complex alloys (CCAs), a term encompassing high entropy alloys (HEAs) or multi-principal element alloys (MPEAs), are—in general—noted for their inherently high corrosion resistance. In order to gain an insight into the dissolution of Al1.5TiVCr alloy, atomic emission spectroelectrochemistry was utilised in order to measure the ion dissolution of the alloy during anodic polarisation. It was revealed that incongruent dissolution occurred, with preferential dissolution of Al, and essentially no dissolution of Ti, until the point of alloy breakdown. Results were correlated with X-ray photoelectron spectroscopy, which revealed a complex surface oxide inclusive of unoxidised metal, and metal oxides in disproportion to the bulk alloying element ratio.",

author = "Yao Qiu and Ruiliang Liu and Thomas Gengenbach and Ouma{\"i}ma Gharbi and Sanjay Choudhary and Sebastian Thomas and Fraser, \{Hamish L.\} and Nick Birbilis",

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doi = "10.1038/s41529-020-0112-3",

language = "English",

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TY - JOUR

T1 - Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS

AU - Qiu, Yao

AU - Liu, Ruiliang

AU - Gengenbach, Thomas

AU - Gharbi, Oumaïma

AU - Choudhary, Sanjay

AU - Thomas, Sebastian

AU - Fraser, Hamish L.

AU - Birbilis, Nick

PY - 2020/12

Y1 - 2020/12

N2 - The real-time dissolution of the single-phase compositionally complex alloy (CCA), Al1.5TiVCr, was studied using an inline inductively coupled plasma method. Compositionally complex alloys (CCAs), a term encompassing high entropy alloys (HEAs) or multi-principal element alloys (MPEAs), are—in general—noted for their inherently high corrosion resistance. In order to gain an insight into the dissolution of Al1.5TiVCr alloy, atomic emission spectroelectrochemistry was utilised in order to measure the ion dissolution of the alloy during anodic polarisation. It was revealed that incongruent dissolution occurred, with preferential dissolution of Al, and essentially no dissolution of Ti, until the point of alloy breakdown. Results were correlated with X-ray photoelectron spectroscopy, which revealed a complex surface oxide inclusive of unoxidised metal, and metal oxides in disproportion to the bulk alloying element ratio.

AB - The real-time dissolution of the single-phase compositionally complex alloy (CCA), Al1.5TiVCr, was studied using an inline inductively coupled plasma method. Compositionally complex alloys (CCAs), a term encompassing high entropy alloys (HEAs) or multi-principal element alloys (MPEAs), are—in general—noted for their inherently high corrosion resistance. In order to gain an insight into the dissolution of Al1.5TiVCr alloy, atomic emission spectroelectrochemistry was utilised in order to measure the ion dissolution of the alloy during anodic polarisation. It was revealed that incongruent dissolution occurred, with preferential dissolution of Al, and essentially no dissolution of Ti, until the point of alloy breakdown. Results were correlated with X-ray photoelectron spectroscopy, which revealed a complex surface oxide inclusive of unoxidised metal, and metal oxides in disproportion to the bulk alloying element ratio.

UR - https://www.scopus.com/pages/publications/85102413373

U2 - 10.1038/s41529-020-0112-3

DO - 10.1038/s41529-020-0112-3

M3 - Article

SN - 2397-2106

VL - 4

JO - npj Materials Degradation

JF - npj Materials Degradation

IS - 1

M1 - 7

ER -

Real-time dissolution of a compositionally complex alloy using inline ICP and correlation with XPS

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