Microstructure and Corrosion Resistance of FeCrAl Coating after High Current Pulsed Electron Beam Surface Modification

AbstractThe microstructure and corrosion resistance of arc sprayed FeCrAl coatings treated by high current pulsed electron beam (HCPEB) have been investigated. It was found that after treated by HCPEB, the pores in the surface of as-sprayed coating is remarkably reduced, and a big amount of discrete bulged nodules, which mainly contains Fe-Cr column grains, have been produced on surface due to rapid solidification after HCPEB; Corrosion resistance results show that the corrosion potential has increased, and the corrosion currency and rate have decreased by one order of magnitude after treated by HCPEB with pulse duration of 50μs