METHOD OF SETTING AND CONTROLLING DESIRED REDOX POTENTIALS IN GASES

摘要

Method for controlling desired redox potential in hydrogen-containing protective gases used in hi high-temperature furnaces in powder-metallurgical processes . A sample of the protective gas is withdrawn from the furnace and the redox potential of the sample measured at the high temperature to produce treated bodies of good quality. Humidifying the gases blowing through the furnace is employed to crase or minimize a deviation of the redox potential of the sample from a predetermined redox potential in oxygen-hydrogen mixture may be obtained by electrolysis of water as function of the measured redox potential and this mixture may be use i for humidification. In this mallner good quality end products are assured despite fluctuatuions in throughput and properties of material entering the furnace.