本文主要研究了12SiMoVNbAl低合金钢耐含硫原油长期高温腐蚀的锈层之组织结构。用金相及岩相方法观察了锈层的组织结构。锈层主要分里、外两层。里层致密,外层疏松。用电子探针及扫描电镜观察并测定了合金元素在基体金属和锈层中的分布。该钢合金元素含量虽然较低,但仍具有较好的抗高温腐蚀的性能。硅、铝等合金元素在里锈层中的富集是提高其抗高温腐蚀性能的主要原因。
The structures of the scales formed on low alloy SiMoVNbAl and Cr_5Mo steels have been investigated. It has been found that the addition of aluminum and chromium can greatly improve the scaling resistance of low alloyed steels in high-temperature conditions, The enrichment of alloying elements in the scale is one of the important reasons for the better resistance against hightemperature corrosion of these steels.
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