Microstructure and corrosion resistance of highly <111> oriented electrodeposited CoNiFe medium-entropy alloy films

The medium-entropy alloy is a newly intriguing material showing superb properties. A simple, one-step method was developed to electrodeposit CoNiFe films from sulfate and citrate bath. microstructure corrosion resistance were investigated in with varying deposition current densities. It shows the face-centered cubic structure <111> preferential orientation. HRTEM-EDS observations further show information on nanostructure element distribution. exhibit strong 3.5 wt.% NaCl solution. electrodeposited density of 44.4 A/dm2 low self-corrosion 4.72 × 10−6 A⋅cm−2 mechanism proposed combination electrochemical impedance spectroscopy results. outstanding properties attributed near-equimolar ternary components. results lay solid foundation for developing highly oriented resistance.