Abstract Model alloys Ni-(20, 30)Cr (wt.%) with (0.1, 1)% Si, 1.5% Al or (1, 2)% Ti were exposed to Ar-20CO2 at 700 °C. Samples were electropolished before reaction to avoid cold working effects on alloy diffusion. The Ni-20Cr alloy formed a thick NiO scale and an internal oxidation zone, whereas Ni-30Cr formed a duplex scale of NiO and Cr2O3 layers. The Si and Al additions increased the oxidation resistance by forming additional protective layers of SiO2 or Al2O3. Titanium accelerated chromia growth, promoting alloy surface coverage with protective oxide. All alloys formed intergranular Cr-rich carbide precipitates beneath their scales.

中文翻译：

---

Si、Al和Ti对Ni-20Cr和Ni-30Cr合金在Ar-20CO 2 中700℃腐蚀的影响

摘要 模型合金 Ni-(20, 30)Cr (wt.%) with (0.1, 1)% Si, 1.5% Al 或 (1, 2)% Ti 在 700 °C 下暴露于 Ar-20CO2 中。样品在反应前进行电抛光以避免冷加工对合金扩散的影响。Ni-20Cr 合金形成较厚的 NiO 氧化皮和内部氧化区，而 Ni-30Cr 形成 NiO 和 Cr2O3 层的双相氧化皮。Si 和 Al 的添加通过形成额外的 SiO2 或 Al2O3 保护层来提高抗氧化性。钛加速了氧化铬的生长，用保护性氧化物促进合金表面覆盖。所有合金都在其鳞片下形成晶间富铬碳化物沉淀。