Investigation of steel corrosion in MX80 bentonite at 120°C,Materials and Corrosion

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Investigation of steel corrosion in MX80 bentonite at 120°C
Materials and Corrosion ( IF 1.6 ) Pub Date : 2020-08-30 , DOI: 10.1002/maco.202011777
Hélène Lotz ₁ , Charly Carrière ₁ , Christian Bataillon ₂ , Emmanuel Gardes ₃ , Isabelle Monnet ₃ , Eddy Foy ₁ , Michel L. Schlegel ₄ , James J. Dynes ₅ , Delphine Neff ₁ , Florence Mercier‐Bion ₁ , Philippe Dillmann ₁

Affiliation

Corrosion experiments were performed on two metallic substrates, a ferritic–pearlitic steel (P285NH) and a ferritic one (Armco), in silicate environment during 30 days at 120°C. Corrosion products were characterized in terms of morphology (scanning electron microscope and transmission electron microscopy), composition (energydispersive X‐ray spectroscopy) and structure (µ‐Raman, selected area electron diffraction, X‐ray absorption near edge structure). Results show a nanometric inner layer made of compact and adherent nanocrystallized magnetite with, locally a thickness up to several micrometers due to the metal microstructure. An outer layer of Fe‐rich phyllosilicate, smectite and serpentine, more porous than the inner one and poorly adherent is observed around both the samples.

中文翻译：

MX80膨润土在120°C下的钢腐蚀研究

在硅酸盐环境中于120°C的温度下，对两种金属基底（铁素体-珠光体钢（P285NH）和铁素体（Armco））进行了腐蚀实验。根据形态（扫描电子显微镜和透射电子显微镜），成分（能量色散X射线光谱）和结构（μ拉曼，选定区域电子衍射，近边缘结构的X射线吸收）表征腐蚀产物。结果显示了由致密且粘附的纳米结晶磁铁矿制成的纳米级内层，由于金属的微观结构，局部厚度可达几微米。在两个样品周围都发现了一层富含铁的层状硅酸盐，蒙脱石和蛇纹石，其内层比内部多孔得多，附着力差。

更新日期：2020-08-30

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