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. 2021 Dec 17;14(24):7818.
doi: 10.3390/ma14247818.

The Effect of Heat Treatment on the Corrosion Resistance of Fe-Based Amorphous Alloy Coating Prepared by High Velocity Oxygen Fuel Method

Chun-Ying Lee  1 , Hung-Hua Sheu  2   3 , Leu-Wen Tsay  4 , Po-Sen Hsiao  4 , Tzu-Jing Lin  4 , Hung-Bin Lee  4
Affiliations

The Effect of Heat Treatment on the Corrosion Resistance of Fe-Based Amorphous Alloy Coating Prepared by High Velocity Oxygen Fuel Method

Chun-Ying Lee et al. Materials (Basel). .

Abstract

In this study, Fe40Cr19Mo18C15B8 amorphous coatings were prepared using high velocity oxygen fuel (HVOF) technology. Different temperatures were used in the heat treatment (600 °C, 650 °C, and 700 °C) and the annealed coatings were analyzed by DSC, SEM, TEM, and XRD. XRD and DSC results showed that the coating started to form a crystalline structure after annealing at 650 °C. From the SEM observation, it can be found that when the annealing temperature of the Fe-based amorphous alloy coating reached 700 °C, the surface morphology of the coating became relatively flat. TEM observation showed that when the annealing temperature of the Fe-based amorphous alloy coating was 700 °C, crystal grains in the coating recrystallized with a grain size of 5-20 nm. SAED analysis showed that the precipitated carbide phase was M23C6 phase with different crystal orientations (M = Fe, Cr, Mo). Finally, the corrosion polarization curve showed that the corrosion current density of the coating after annealing only increased by 9.13 μA/cm2, which indicated that the coating after annealing treatment still had excellent corrosion resistance. It also proved that the Fe-based amorphous alloy coating can be used in high-temperature environments. XPS analysis showed that after annealing FeO and Fe2O3 oxide components increased, and the formation of a large number of crystals in the coating resulted in a decrease in corrosion resistance.

Keywords: HVOF; amorphous structure; corrosion; heat treatment.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
SEM images of Fe-based amorphous alloy coating before annealing: (a) initial powders, (b) surface of coating, (c) cross-section of coating, (d) TEM image of coating.
Figure 2
Figure 2
Measured results of the sprayed coating: (a) XRD spectrum, (b) DSC curves.
Figure 3
Figure 3
SEM morphologies of the Fe-based amorphous alloy coating after annealing at different temperatures: (a) 600 °C, (b) 650 °C, (c) 700 °C.
Figure 4
Figure 4
Polarization curves of Fe-based amorphous alloy coatings carried out with different annealing temperature.
Figure 5
Figure 5
(a) DSC curves of Fe-based amorphous alloy coatings using heating rates of 10, 20, 30, and 40 °C/min. (b) Kissinger plot for the recrystallization exothermic peaks of Fe-based amorphous alloy coatings.
Figure 6
Figure 6
TEM images of coatings after annealing: (a) initial coating, (b) after annealing at 600 °C, (c) after annealing at 700 °C. (d) SAED image of coating after annealing at 700 °C. (e,f) Magnification photos of coating after annealing at 700 °C.
Figure 7
Figure 7
XPS spectra of passive films on the coatings initially (a,c,e) and after annealing at 700 °C (b,d,f).
See this image and copyright information in PMC

References

    1. Lin T.J., Sheu H.H., Lee C.Y., Lee H.B. The study of mechanical properties and corrosion behavior of the Fe-based amorphous alloy coatings using high velocity oxygen fuel spraying. J. Alloys Compd. 2021;867:159132. doi: 10.1016/j.jallcom.2021.159132. - DOI
    1. Si C., Duana B., Zhang Q., Cai J., Wu W. Microstructure, corrosion-resistance, and wear-resistance properties of subsonic flame sprayed amorphous Fe–Mo–Cr–Co coating with extremely high amorphous rate. J. Mater. Res. Technol. 2020;9:3292–3303. doi: 10.1016/j.jmrt.2020.01.024. - DOI
    1. Shi L., Qin X., Yao K. Tailoring soft magnetic properties of Fe-based amorphous alloys through C addition. Prog. Nat. Sci. Mater. Int. 2020;30:208–212. doi: 10.1016/j.pnsc.2020.02.001. - DOI
    1. Zhou Y.K., Liu X.B., Kang J.J., Yue W., Qin W.B., Ma G., Fu Z.Q., Zhu L.N., She D.S., Wang H.D., et al. Corrosion behavior of HVOF sprayed WC-10Co4Cr coatings in the simulated seawater drilling fluid under the high pressure. Eng. Fail. Anal. 2020;109:104338. doi: 10.1016/j.engfailanal.2019.104338. - DOI
    1. Farmer J., Choi J.S., Saw C., Haslam J., Day D., Hailey P., Lian T., Rebak R., Perepezko J., Payer J., et al. Iron-Based Amorphous Metals: High-Performance Corrosion-Resistant Material Development. Metall. Mater. Trans. A. 2009;40:1289–1305. doi: 10.1007/s11661-008-9779-8. - DOI

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