表面Ni-Al鍍層對T91鍋爐用鋼抗高溫氧化之研究

Effect of Ni-Al Surface Coatings on High Temperature Oxidation of T91 Boiler Steels

廖崇閔(C. M. Liao) ； 陳偉昇(W. S. Chen) ； 開物(W. Kai)

《防蝕工程》 24卷4期 (2010/12) Pp. 229-236

https://doi.org/10.6376/JCCE.201012.0229

摘要

本研究主要探討9Cr-1Mo鍋爐用鋼(T91)以及施以表面Ni-Al改質(T91-NA)鋼材在650-850℃空氣條件下的高溫氧化行爲。研究結果顯示，T91在650℃和T91-NA在650-850℃下皆仍遵守拋物線律，但T91在750℃及850℃爲加速氧化反應。另一方面，T91-NA在所有溫度下情有保護性良好的氧化鋁層(α-Al2O3)生成，致使合金的氧化速率明顯降低。

關鍵字

氧化行爲 ； 拋物線律 ； 加速氣化 ； α-Al2O3

並列摘要

The high temperature oxidation behavior of 9Cr-1Mo alloys (T91) and the alloys with Ni-Al surface coatings (T91-NA) were studied over the temperature range of 650-850℃ in dry air. The results showed that the oxidation kinetics of T91 followed a parabolic rate law at 650℃. However, the breakaway kinetics was observed at 750℃ and 850℃. In addition, the oxidation kinetics of T91-NA followed the parabolic-rate law at temperatures ranging from 650 to 850℃. The scales formed on T91-NA consisted of an exclusive α-Al2O3. of which the formation was responsible for the reduction in oxidation rate of the T91-NA alloy, as compared with the rate of the T91 alloy.

並列關鍵字

Oxidation behavior ； Parabolic rate law ； Breakaway ； α-Al2O3