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Oxidation of Armco-Fe and steels in oxygen-saturated liquid lead

机译：富氧液态铅中Armco-Fe和钢的氧化

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摘要

The oxidation behaviour of Armco-Fe, martensitic (0.2C-13Cr), ferritic-martensitic EP-823 (13Cr- 2Si) and austenitic stainless (18,Cr- l0Ni- 1Ti) steels in a static lead melt, saturated by oxygen (1.3 X 10~(-3) wt percent O), at 550 deg C, for 3000h was investigated. The features of the oxide layers formation were revealed. Regardless of material a double oxide layer growing symmetrically with regard to the initial interface "solid metal/liquid Pb" towards the melt and matrix was formed. The outer layer for all materials was Fe_3O_4, while the inner One was composed of Fe_3O_4 for Armco-Fe, Fe_(1+x)Cr_(2-x)O_4 for martensitic and ferritic-martensitic steels and of Fe_(1+x)Cr_(2-x)O_4 +Ni for the austenitic steel. Lead did not penetrate into the matrix of tested materials but was detected in the outer columnar part of the scales, except the austenitic steel in which Pb was also observed in the inner part of the scale enriched by Cr and Ni. An oxidation mechanism is proposed.
机译：Armco-Fe，马氏体（0.2C-13Cr），铁素体-马氏体EP-823（13Cr-2Si）和奥氏体不锈钢（18，Cr-10Ni-1Ti）在静态铅熔体中的氧饱和度（在550摄氏度下研究了1.3 X 10〜（-3）wt％O）3000小时。揭示了氧化物层形成的特征。不管材料如何，都形成了相对于初始界面“固体金属/液体Pb”朝向熔体和基体对称生长的双氧化物层。所有材料的外层均为Fe_3O_4，内层由Armco-Fe的Fe_3O_4，马氏体和铁素体-马氏体钢的Fe_（1 + x）Cr_（2-x）O_4和Fe_（1 + x）组成Cr_（2-x）O_4 + Ni用于奥氏体钢。铅没有渗透到被测材料的基体中，但是在鳞片的外部柱状部分中被检测到，除了奥氏体钢中在铬和镍富集的鳞片的内部也观察到了Pb。提出了一种氧化机理。

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