期刊
COATINGS
卷 10, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/coatings10101006
关键词
iron-based amorphous coatings; wear resistance; corrosion resistance; atmospheric plasma spraying; high-velocity oxy-fuel spraying
资金
- Higher Education commission Pakistan (HEC) under Technological development fund [HEC-TDF-02-046]
- Pakistan Science Foundation [PSF/NSFC-II/ENG/C-IST (10)]
Iron-based amorphous coatings are getting attention owing to their attractive mechanical, chemical, and thermal properties. In this study, the comparative analysis between high-velocity oxy-fuel (HVOF) and atmospheric plasma (APS) spraying processes has been done. The detailed structural analysis of deposited coatings were studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Mechanical and electrochemical properties were investigated by using micro-Vickers hardness testing, pin-on-disc tribometry and potentiodynamic analysis. The microstructure comparison revealed that HVOF-coated samples had better density than that of APS. The porosity in APS-coated samples was 2 times higher than that of HVOF-coated samples. The comparison of tribological properties showed that HVOF-coated samples had 3.9% better hardness than that of coatings obtained via APS. The wear test showed that HVOF-coated samples had better wear resistance in comparison to APS coatings. Furthermore, the potentiodynamic polarization and electrochemical impedance spectroscopy showed that the HVOF-coated samples had better corrosion resistance in comparison to APS-coated samples.
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