Current progress in corrosion of multi principal element alloys

TL;DR

This review summarizes recent advances in understanding the corrosion behavior of multi-principal element alloys (MPEAs), highlighting electrochemical features, future research directions, and providing a comprehensive database for data analysis and machine learning applications.

Contribution

It offers an overview of corrosion mechanisms in MPEAs, compiles a detailed database of corrosion performance, and discusses future research needs for mechanistic understanding.

Findings

Electrochemical phenomena in MPEA corrosion are complex and distinct from traditional alloys.

A comprehensive database of MPEA corrosion data has been assembled for analysis.

Future work is needed to develop a holistic mechanistic understanding of MPEA corrosion.

Abstract

Whilst multi-principal element alloys (MPEAs) remain a promising class of materials owing to several attractive mechanical properties, their corrosion performance is also unique. In this concise review, we present an emerging overview of some of the general features related to MPEA corrosion, following a decade of work in the field. This includes highlighting some of the key aspects related to the electrochemical phenomena in MPEA corrosion, and the relevant future works required for a holistic mechanistic understanding. In addition, a comprehensive database of the reported corrosion performance of MPEAs is presented, based on works reported to date. The database is assembled to also allow users to undertake machine learning or their own data analysis, with a parsed representation of alloy composition, test electrolyte, and corrosion related parameters.