The results of an investigation of the relationship between potentiodynamic anodic polarization behavior, composition, and microstructure for both sputtered and electroplated Ni‐Fe thin‐film alloys is described. The presence of high‐temperature phases established by sputter deposition correlate directly with the compositional dependence of the passive current density. These results correlate exceptionally well with previous studies on the corrosion of Ni‐Fe films under simulated atmospheric conditions. Electroplated films of the permalloy composition show significantly different passive behavior, as compared to sputter deposited films. Possible explanations for this anomaly are discussed.
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