Effect of surface morphology on atmospheric corrosion behaviour of Fe-based metallic glass, Fe67Co18Si14B1

Bulletin of materials science

D Srivastava²  R Balasubramaniam¹  B Vishwanadh²  G K Dey² 

[1] Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur 208 016, India$$Department of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur 208 016, IndiaDepartment of Materials and Metallurgical Engineering, Indian Institute of Technology, Kanpur 208 016, India$$;Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$Materials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, IndiaMaterials Science Division, Bhabha Atomic Research Centre, Mumbai 400 085, India$$

关键词: Atmospheric corrosion;    metallic glasses;    amorphous structure.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The nature of atmospheric corrosion behaviour of an as-cast metallic glass, Fe₆₇Co₁₈Si₁B₁₄ ribbon, was evaluated. The wheel side surface of the ribbon was more corroded than the air side surface, due to the higher density of air pockets present. The phases present in atmospheric rust were analysed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) to be goethite, lepidocrocite, magnetite, cobalt oxide and cobalt hydroxide phases. Goethite and lepidocrocite were in amorphous form. The nature of rusting was understood by scanning electron microscopy (SEM). Nucleation of rust started at preferred locations on the surface and grew along the surface in certain directions.

【 授权许可】

Unknown