对某锅炉TP347H材质的过热器管内壁氧化膜及其剥落物进行了扫描电镜、能谱、X射线衍射等分析，研究了加氧处理环境中氧化微观特征及其机理。结果表明：加氧处理后TP347H钢管内壁氧化膜主要分为内、外两层，内层为致密的（Cr，Fe）₂O₄、NiO等非均质层，外层主要由Fe₃O₄、Fe₂O₃组成；加氧处理改变了TP347H钢管内壁氧化膜的形态及其氧化机制，使氧化膜中氧含量增加，外氧化层变为疏松、多孔、细小粒状结构，内氧化层富含孔洞，促进了氧化传质过程，加速了金属基体氧化。

Scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction were used to analyze the oxide film on the internal surface of super-heater tubes made of TP347H material of a boiler and its exfoliation. The microscopic characteristics and mechanism of oxidation in oxygenation treatment environment were studied. The results show that the oxide film on the internal surface of TP347H steel tubes after oxygenation treatment mainly consisted of two layers, an inner layer and an outer layer. The inner layer was heterosphere and was composed of (Cr,Fe)₂O₄ and NiO, while the outer layer was composed of Fe₂O₃ and Fe₃O₄. The oxygenation treatment changed the steam-side oxidation mechanism and characterization, increased the oxygen content in oxide film, the outer layer became loose, porous and fine granular structure, and the inner oxide layer was rich in pores, which promoted the oxidation mass transfer process and accelerated the oxidation of metal matrix