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测试了经９００℃空气中预氧化的Ｎｉ、Ｃｏ、Ｃｒ及Ｎｉ－Ｃｒ、Ｃｏ—Ｃｒ、Ｎｉ－Ａｌ、Ｆｅ—Ａｌ合金试样在９００℃Ｎａ２ＳＯ４熔盐中的电位。建立了带氧化膜金属及合金在熔盐中的电位理论模型，预氧化金属及合金在熔盐中的电位与氧化膜的种类、氧化膜中电子和离子迁移数的大小、氧化速度（表现为电流ｉ）以及界面反应极化阻力有关。预氧化金属及合金试样在熔盐中的电位的测试结果，与此理论模型相一致。
The potentials of pre-oxidized Ni, Co, Cr and Ni-Cr, Co-Cr, Ni-Al and Fe-Al alloys in air at 900 ℃ were measured. The theoretical model of the potential of the metal and alloy with oxide film in molten salt was established. The potential and the type of oxide film of the pre-oxidized metal and alloy in molten salt, the size of the electron and ion migration in the oxide film, the oxidation rate Current i) and interface reaction polarization resistance. The test results of the potential of the pre-oxidized metal and the alloy specimen in the molten salt are in accordance with this theoretical model.