Abstract
Two different types of coatings were prepared, by a high velocity oxy-fuel spraying method and a laser spraying method, respectively, using bulk metallic glass powders with the nominal composition of Fe68.5C7.1Si3.3B5.5P8.7Cr2.3Mo2.5Al2.0. The corrosion behaviors of the two coatings in 1M HCl, H2SO4, NaCl and NaOH solutions were investigated based upon the microstructural differences originating from the different coating methods. The amorphous coating layer formed by the high velocity oxy-fuel spraying method exhibited higher, excellent corrosion resistance in the 1M HCl solution. The coating layer formed by the laser spraying method exhibited a high pitting tendency attributed to the dendritic microstructure with various borides and carbides. Due to a great number of pores, the HVOF coating exhibits slightly lower corrosion resistance than the LS coating in alkaline solution.
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Wang, S.L., Li, H.X., Hwang, S.Y. et al. Corrosion behaviors of coatings fabricated using bulk metallic glass powders with the composition of Fe68.5C7.1Si3.3B5.5P8.7Cr2.3Mo2.5Al2.0 . Met. Mater. Int. 18, 607–612 (2012). https://doi.org/10.1007/s12540-012-4006-y
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DOI: https://doi.org/10.1007/s12540-012-4006-y