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Materials Science and Engineering of Powder Metallurgy  2019, Vol. 24 Issue (5): 413-421    DOI:
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Corrosion performance of Ta-10W coating on titanium and its alloy by multi-arc ion plating
SUN Pei, GU Yi, LI Yaqi, LIU Baoshan
School of Material Science and Engineering, Central South University, Changsha, 410083 China
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Abstract  To improve the corrosion performance of titanium and titanium alloy in human body and Marine environment,the Ta-10W coating was prepared on the commercial pure titanium (CP-Ti) and TC4 matrix by multi-arc ion plating. The corrosion resistance of the coating in simulated human body and Marine environment was studied by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), electrodynamic polarization and electrochemical impedance spectroscopy (EIS) test. The results show that the Ta-10W coating is continuous, dense with uniform thickness. The mainly phase is body-centered cubic α-Ta. Ta-10W coated samples corrosion potential is higher and corrosion current density is lower in ringer solution and simulated seawater solution. The Ta-10W coating on CP-Ti reduces the corrosion current density to 2.648×10-9 A/cm2 in ringer solution and 2.548×10-9 A/cm2 in simulated seawater solution, which is an order of magnitude lower than that of CP-Ti matrix, and also has excellent improvements on TC4 matrix. In addition, Ta-10W increases the charge transfer resistance of CP-Ti and TC4 by 1 or 2 orders of magnitude in the two solutions. The dielectric property of the double layer is also improved by coating Ta-10W, thus the corrosion resistance of CP-Ti and TC4 in different solution environments is effectively improved. Therefore, Ta-10W coating has a good protective effect on the corrosion resistance of CP-Ti and TC4 in human body and marine environment, and is instructive for the application of titanium and titanium alloy in these environments.
Key wordssurface engineering      tantalum alloy coating      titanium alloy      multi-arc ion plating      electrochemical corrosion     
Received: 25 March 2019      Published: 14 November 2019
ZTFLH:  TG178  
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SUN Pei
GU Yi
LI Yaqi
LIU Baoshan
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SUN Pei,GU Yi,LI Yaqi, et al. Corrosion performance of Ta-10W coating on titanium and its alloy by multi-arc ion plating[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(5): 413-421.
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