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The sputter-deposited Cr-Ta alloys show extremely high corrosion resistance in 12 M HCl. The open circuit potentials of the Cr-Ta alloys are located in the passive regions of both chromium and tantalum, and all Cr-Ta alloys are spontaneously passivated. XPS analysis indicates that the composition and thickness of the air-formed film are the same as those of spontaneously passivated film, and the composition...
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