Component with protective coating against corrosion and oxidation at elevated temperatures

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Alloy for protecting a component against corrosion and/or oxidation at high temperatures comprises (wt.%) : cobalt (11-13), chromium (20-22), aluminum (10.5-11.5), yttrium, scandium or rare earth metal (0.3-0.5), rhenium (1.5-2.5) and nickel (to 100). Independent claims are also included for : (1) protective layer comprising an alloy as above; and (2) component with a protective layer as above.