Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (8): 1007-1014.DOI: 10.1007/s40195-019-00896-1
Special Issue: 2019年腐蚀专辑-2
• Orginal Article • Previous Articles Next Articles
Ying Han1, Hong-Rui Wang1, Yun-Dong Cao1, Wen-Tao Hou2, Shu-Jun Li2
Received:
2018-12-16
Online:
2019-08-10
Published:
2019-07-08
Ying Han, Hong-Rui Wang, Yun-Dong Cao, Wen-Tao Hou, Shu-Jun Li. Improved Corrosion Resistance of Selective Laser Melted Ti-5Cu Alloy Using Atomized Ti-5Cu Powder[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(8): 1007-1014.
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Parameter | Value |
---|---|
Laser power (W) | 200 |
Laser scan speed (mm s-1) | 1150 |
Laser spot size (μm) | 90 |
Layer thickness (μm) | 30 |
Hatch space (μm) | 100 |
Table 1 Main SLM manufacturing parameters used in this work
Parameter | Value |
---|---|
Laser power (W) | 200 |
Laser scan speed (mm s-1) | 1150 |
Laser spot size (μm) | 90 |
Layer thickness (μm) | 30 |
Hatch space (μm) | 100 |
Fig. 3 Potentiodynamic polarization curves of three parallel samples of the selective laser melted Ti-5Cu alloy immersed in Hank’s solution at 37?±?1 °C
Samples | Ipp (μA cm-2) | Ecorr (V) | References |
---|---|---|---|
SLMed-M Ti-5Cu | - | -?0.277?±?0.002 | [ |
SLMed Ti-5Cu | 1.61 | -?0.62 | |
3.15 | -?0.69 | ||
3.57 | -?0.62 | ||
Average | 2.78 | -?0.64 | This work |
Standard deviation | 1.03 | 0.04 |
Table 2 Fitting results of potentiodynamic polarization curves for the SLMed Ti-5Cu immersed in Hank’s solution at 37?±?1 °C
Samples | Ipp (μA cm-2) | Ecorr (V) | References |
---|---|---|---|
SLMed-M Ti-5Cu | - | -?0.277?±?0.002 | [ |
SLMed Ti-5Cu | 1.61 | -?0.62 | |
3.15 | -?0.69 | ||
3.57 | -?0.62 | ||
Average | 2.78 | -?0.64 | This work |
Standard deviation | 1.03 | 0.04 |
Fig. 5 Electrochemical impedance spectra (EIS) results of selective laser melted Ti-5Cu immersed in Hank’s solution at 37?±?1 °C: a Nyquist plots (the inset is the equivalent circuit diagram), b Bode plots (the solid blue arrow indicates the Bode impedance plot and the hollow arrow illustrates the Bode phase angle plot)
Samples | Rs (Ω cm2) | CPE?×104 (Ω-1 cm-2 S-n) | n | Rct (MΩ cm2) | χ2×103 | References |
---|---|---|---|---|---|---|
SLMed-M Ti-5Cu | 14.68?±?3.09 | 13.9?±?0.02 | 0.97?±?0.01 | 4.76?±?1.22 | - | [ |
SLMed Ti-5Cu | 38.38 | 10.45 | 0.93 | 9.01 | 4.31 | |
39.51 | 15.63 | 0.95 | 8.16 | 7.80 | ||
36.98 | 11.43 | 0.94 | 13.10 | 3.17 | ||
Average | 38.29 | 12.50 | 0.94 | 10.09 | 5.09 | This work |
Standard deviation | 1.26 | 2.75 | 0.01 | 2.63 | 2.41 |
Table 3 EIS fitting results for the SLMed Ti-5Cu immersed in Hank’s solution
Samples | Rs (Ω cm2) | CPE?×104 (Ω-1 cm-2 S-n) | n | Rct (MΩ cm2) | χ2×103 | References |
---|---|---|---|---|---|---|
SLMed-M Ti-5Cu | 14.68?±?3.09 | 13.9?±?0.02 | 0.97?±?0.01 | 4.76?±?1.22 | - | [ |
SLMed Ti-5Cu | 38.38 | 10.45 | 0.93 | 9.01 | 4.31 | |
39.51 | 15.63 | 0.95 | 8.16 | 7.80 | ||
36.98 | 11.43 | 0.94 | 13.10 | 3.17 | ||
Average | 38.29 | 12.50 | 0.94 | 10.09 | 5.09 | This work |
Standard deviation | 1.26 | 2.75 | 0.01 | 2.63 | 2.41 |
Fig. 6 Mott-Schottky curves of three parallel samples of selective laser melted Ti-5Cu alloy for the passive film formed at 0.5 VSCE immersed in Hank’s solution at 37?±?1 °C
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