The oxidation behavior of metals was studied by subjecting the metal sample to a linear temperature increase at constant oxygen pressure. The advantages of this method over previous isothermal methods are that (a) a rapid preliminary examination of the oxidation behavior of any metal or alloy over a desired temperature and pressure range can be made quickly, (6) the region of pressure dependence usually can be found in a single experiment, (c) the number of samples needed is greatly reduced, and (d) the method serves as a guide for isothermal measurements at constant pressure.