Abstract
Amorphous Fe-based coatings deposited on AISI 420S steel by electro-spark deposition in argon at atmospheric pressure and in vacuum using a Fe41Co7Cr15Mo14C15B6Y2 electrode were studied. At the same pulse energy, melt droplets formed during processing in vacuum wet the substrate surface better. This is due to the in situ formation of a thin layer during arc evaporation of the electrode in vacuum prior to the melt transfer. Vacuum-deposited coatings exhibit significantly lower corrosion current and wear rates in seawater.
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