A High Throughput Aqueous Passivation Testing Methodology for Compositionally Complex Alloys Using a Scanning Droplet Cell
Debashish Sur, Howie Joress, Jason Hattrick‐Simpers, John R. Scully
Abstract
Compositionally complex alloys containing four or more principal elements provide an opportunity to explore a wide range of compositions, processing, and microstructural variables to find new materials with unique properties. In particular, the discovery of novel alloys that form self-healing, protective passivating films is of substantial interest. Probing experimentally a robust landscape of such alloys requires the utilization of high-throughput electrochemical methods to uncover key differences, ideally captured by discriminating metrics, indicative of superior properties. Herein, a methodology is demonstrated using a scanning droplet cell for a rapid passivation behavior evaluation of Al 0.7-x-y Co x Cr y Fe 0.15 Ni 0.15 combinatorial alloy library in 0.1 mol l −1 H 2 SO 4(aq) .