| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Adding Ta on Corrosion Resistance of Fe-based Amorphous Alloy Coatings |
| TONG Fujia1, ZHANG Guan1,2,3,*, XIE Lei4, ZHAO Dongmei1, REN Tiezhen5
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1 College of Intelligent Manufacturing Modern Industry, Xinjiang University, Urumqi 830017, China;
2 Xinjiang Coal Mine Electromechanical Engineering Technology Research Center, Xinjiang Institute of Engineering, Urumqi 830023, China;
3 College of Mechanical and Electrical Engineering, Xinjiang Institute of Engineering, Urumqi 830023, China;
4 School of Physics Science and Technology, Xinjiang University, Urumqi 830046, China;
5 School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830046, China |
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Abstract To enhance the hardness and corrosion resistance of SAM2X5 Fe-based amorphous alloy coatings, different contents of Ta were added to in-situ synthesize TaC reinforcement phases through reactions with C in the matrix. This approach aims to improve the coating's microstructure and consequently enhance its mechanical and corrosion-resistant properties. Compared with coatings without Ta, those with Ta additions exhibit in-situ formation of TaC phases. With the increase of Ta content, the amount of TaC phases increases, while the amorphous phase fraction in the coating decreases. The appropriate addition of Ta significantly improves the microhardness of the coating, with the 10% Ta coating achieving the highest hardness(1 476.38HV0.3). Electrochemical tests, scanning electron microscopy(SEM), and X-ray photoelectron spectroscopy(XPS) analyses reveal that the addition of Ta facilitated the formation of Cr3+/Cr6+/Mo6+/W6+ oxides. Moreover, the formation of a dense and stable Ta2O5 oxide acts synergistically with other oxides, further enhancing the corrosion resistance.
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Published: 25 March 2026
Online: 2026-04-03
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2026, Vol. 40 
