Influence of FeCrAl Coating Arc Sprayed on Aluminum Corrosion Resistance of H13 Steel

Abstract:

FeCrAl coating was prepared on the surface of H13 steel through electric arc spraying (EASP) technology. The surface and cross section morphology, elements and phase composition of the composite coating were analyzed by the means of scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The aluminum corrosion resistance was tested by the static hot-dip aluminum method in molten AC4C aluminum at 700°C. The result showed that the FeCrAl coating, of which the microstructure was compact, had typical layer structure, and a small amount of oxide films and pores could be found among the lamellar particles. FeCrAl coating mainly contained Fe-Cr solid solution and small amounts of Al₂O₃. The weight of H13 corrosion was 3 times as much as that of FeCrAl coating corrosion after static melting treatment for 1h, and the corrosion rate of H13 steel and FeCrAl coating were both increased as the corrosion time increased from 1h to 3h. It was worthy noted that the weight of H13 corrosion was significantly increased, which was 17 times as much as that of FeCrAl coating corrosion.

• Periodical: Materials Science Forum (Volume 817)
• Pages: 565-570
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.817.565
• Online since: April 2015
• Authors: Jian Hua Zhao, Li Wang*, Zheng Heng Shang
• Keywords: Aluminum Corrosion Resistance, Electric Arc Spraying, FeCrAl Coating, H13 Steel

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