A test rig consisting of a quartz tube placed in a horizontal furnace made of five independently regulated heating zones allowed the evaluation of the metal dusting attack of a FeNiCr alloy. Fifteen samples were exposed in a temperature gradient from 504° to 704°C, 1.1 bar, to a highly carburizing atmosphere for 1500 h. Below 561 °C the high density of pits led to uniform corrosion whereas localized pits developed at higher temperatures. In depth pit growth rate raised to a maximum at 632 °C, then decreased showing that it depends both on temperature and on the carbon activity gradient.

中文翻译：

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使用 X 射线断层扫描技术研究 500-700 °C 温度范围内的金属粉尘侵蚀

由放置在水平炉中的石英管组成的试验台由五个独立调节的加热区组成，可以评估 FeNiCr 合金的金属粉尘侵蚀。15 个样品在 504°C 到 704°C 的温度梯度下，1.1 bar 的高渗碳气氛中暴露 1500 小时。在 561 °C 以下，高密度的凹坑导致均匀腐蚀，而局部凹坑在较高温度下形成。深坑生长速率在 632 °C 时升至最大值，然后下降，表明它取决于温度和碳活性梯度。