Reports that four iron meteorite fragments and 13 archaeological iron objects were exposed to a low pressure hydrogen plasma for up to two weeks in a pilot apparatus. In the experiment the objects acted as cathodes in a 600-1600V dc electrical field. While the chlorine-containing beta-FeOOH, akaganeite, was present in all objects before the test, no akaganeite and no chlorides were present afterwards. The objects, including one meteorite which had been exposed for more than 5000 years to seawater, were found to be stable after the glow discharge treatment. The major mineral after treatment was identified as magnetite, and the objects generally assumed an iron gray surface color. No sputtering and no reduction to free iron took place under the test conditions, operating at or below 120°C and at pressures of 0.4-1 mb hydrogen.