本文探討師e及2.25Cr-Mo鋼於空氣下，溫度540�1100 DC間的高溫氧化行為。研究結 果顯示，2.鈞。-Mo鋼在各種溫度下之腐蝕動力學皆遵守拋物線型定律，且在800�1000°C 時，呈現明顯的兩段式拋物線型行認°2.25Cr-Mo鋼比純鐵具有較佳的抗氧化能力，但其 氧化速率之快慢則隨溫度高低而異，於540°C，2.25Cr-Mo鋼之氧化速率較純鐵約可降低 2.38個數量級O經XRD分析結果顯示，2.25Cr-Mo鋼之氧化生成物以Fe203為主，並含有少 量的rFeCrp4'少量:FeCrp4的生成是提昇抗氧化能力的主要閃。

The oxidation behavior of pure Fe and the 2.25Cr-Mo steel was studied over the temperature range 540~1100 in air. The results indicated that the oxidation kinetics of both pure Fe and the 2.25Cr-Mo steel followed the parabolic law, although two-stage kinetics were noted for the steel
at 800~1000 . The oxidation rates of the steel are generally lower than those of pure Fe, whose magnitudes strongly depend on temperature. A typical oxidation rate of the steel is about 2.38 orders of magnitude lower than of pure Fe at 540 . The scales formed on the steel surface by
XRD analysis consisted of mostly Fe2O3 and minor FeCr2O4. The formation of FeCr2O4 is responsible for the oxidation-resistant improvement of the steel.