抄録
The driving force of the oxide scale growth on alloy is the difference in the oxygen potentials between at the alloy/scale and the scale/atmosphere interfaces. When the mass transport in the oxide scale controls the growth of the oxide scale, we usually regard the oxygen potential at the scale/atmosphere interface as that of atmosphere. On the other hands, when the gas supply or the reaction controls the growth, the oxygen potential at the scale/atmosphere interface is different from that of atmosphere. This paper introduces the direct measurement for the oxygenpotential on the scale surface.