The influence of Nb addition on the passivity of CoCrNiNbx multi-principal element alloys

•CoCrNiNbx MPEAs are composed of FCC matrix and Nb-rich HCP dendritic phases.•Oxides on MPEAs consist of a Cr-enriched outer layer and an Nb-enriched inner layer.•CoCrNiNb0.2 achieves optimal corrosion resistance in 0.1 M H2SO4.•Nb0.2 stabilizes the passive film and reduces pitting sensitivity. The...

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Veröffentlicht in:	Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2022-03, Vol.908, p.1, Article 116107
Hauptverfasser:	Wang, Xian-Zong, Hu, Qian, Zhang, Longhua, Cui, Zhongyu
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloying elements Corrosion resistance Dendritic structure Electrochemical analysis Monolayers MPEAs Nb alloying Niobium Passivation Passivity Pitting Pitting (corrosion) Precipitates Surface properties ToF-SIMS XPS
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