Corrosion Behavior of Fe-Based Amorphous/Nanocrystalline Composite Coating: Correlating the Influence of Porosity and Amorphicity

Recently, Fe-based amorphous coatings synthesized by different thermal spraying methods have been investigated as a potential candidate for long-term surface protection of various structures due to their outstanding wear and corrosion resistance. Defects such porosity crystallization are inevitable in the thermal-sprayed coatings, which introduced during synthesis process. The behavior these is adversely affected presence defects. However, identification microstructural feature among content that has greater influence on resistance amorphous/nanocrystalline coating remained elusive so far. Thus, address this problem, situ composite were via high-velocity oxy-fuel (HVOF) spraying, along with two melt-spun ribbons (one fully amorphous, FA-Rib other similar level amorphicity PA-Rib). Results obtained from electrochemical characterizations, Raman analysis Auger electron spectroscopy revealed reduced primary factor affects coatings. A mechanism proposed explain role This study will ultimately help design new improved