Electrochemical Corrosion Properties of Ti-5%TiN Composites Formed by Selective Laser Melting in Hank''''s Solution

Fig. 2. Microstructures of SLM-produced CP-Ti and Ti-5% TiN. (a) Acicular α'-phase in CP-Ti; (b) acicular α'-phase in Ti- 5%TiN; (c) unmelted TiN particles and acicular α'-phase in Ti-5% TiN; (d) magnified image of unmelted TiN particle and EDS data

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Fig. 3. XRD patterns of two samples. (a) CP-Ti; (b) Ti-5% TiN

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Fig. 4. Polarization curves of SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution

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Fig. 5. Electrochemical impedancespectra of SLM-produced CP-Ti and Ti-5%TiN in Hank's solution. (a) Nyquist plot; (b)(c) bode plots; (d) equivalent circuit

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Fig. 6. Morphologies and EDS results of two samples after electrochemical corrosion. (a) Corrosion morphology of CP-Ti; (b) corrosion morphology of Ti-5%TiN; (c) EDS line scanning result of Ti-5% TiN; (d) EDS pattern of point H

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Fig. 7. XPS spectra of passive film on surface of samples. (a) Whole scan spectrum of SLM-produced CP-Ti and Ti-5%TiN; (b) Ti2p spectrum of CP-Ti;(c) O1s spectrum of CP-Ti; (d) Ti2p spectrum of Ti-5%TiN; (e) O1s spectrum of Ti-5%TiN

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Table 1. Electrochemical corrosion parameters of SLM-produced CP-Ti and Ti-5%TiN
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Table 1. Electrochemical corrosion parameters of SLM-produced CP-Ti and Ti-5%TiN
Sample i_p /(μA·cm^-2) E_corr /V ΔE /V R_p /(Ω·cm²) lgβ_c lgβ_a j_corr /(μA·cm^-2)
CP-Ti 0.49 -0.64 0.51 139869 3.698 4.441 6.26
Ti-5%TiN 0.40 -0.65 0.65 160240 4.556 4.142 5.88

Table 2. Fitting results of EIS for SLM-produced CP-Ti and Ti-5%TiN in Hank's solution
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Table 2. Fitting results of EIS for SLM-produced CP-Ti and Ti-5%TiN in Hank's solution
Sample R_s /(Ω·cm²) CPE₁ /(μΩ^-1·cm^-2·S^-n) n₁ R_ct /(MΩ·cm²) CPE₂ /(μΩ^-1·cm^-2·S^-n) n₂ R_f /(Ω·cm²) χ² /10^-4
CP-Ti 65.29 6.27 0.922 0.26 2.51 0.991 273.3 0.72
Ti-5%TiN 10.91 4.48 0.919 5.02 2.80 0.913 419.1 1.46

Table 3. XPS of passive film formed on SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution

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Table 3. XPS of passive film formed on SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution

Specimen	L-S coupling state	Peak position /eV	w_1/2 /eV	Separation energy /eV	Source
	Ti2p_3/2	459.12	1.36	5.76	TiO₂
CP-Ti	Ti2p_1/2	464.88	2.34	-	-
	O1s	530.54	1.11	Null	O^2- of TiO₂
		531.52	2.46	-	—OH^-
	Ti2p_3/2	459.00	1.36	5.69	TiO₂
Ti-5%TiN	Ti2p_1/2	464.69	2.28	-	-
	O1s	530.52	1.33	Null	O^2- of TiO₂
		531.59	2.68	-	—OH^-

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Zhao Yu, Song Zhenming, Jin Jianbo, Xie Min, Zhao Shuzhen, Zhou Shengfeng. Electrochemical Corrosion Properties of Ti-5%TiN Composites Formed by Selective Laser Melting in Hank''''s Solution[J]. Chinese Journal of Lasers, 2019, 46(9): 902005

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Paper Information

Category: laser manufacturing

Received: Apr. 9, 2019

Accepted: --

Published Online: Sep. 10, 2019

The Author Email: Shengfeng Zhou (zhousf1228@163.com)

DOI:10.3788/CJL201946.0902005

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Electrochemical corrosion parameters of SLM-produced CP-Ti and Ti-5%TiN

Table 1. Electrochemical corrosion parameters of SLM-produced CP-Ti and Ti-5%TiN

Table 2. Fitting results of EIS for SLM-produced CP-Ti and Ti-5%TiN in Hank's solution

Table 2. Fitting results of EIS for SLM-produced CP-Ti and Ti-5%TiN in Hank's solution

Table 3. XPS of passive film formed on SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution

Table 3. XPS of passive film formed on SLM-produced CP-Ti and Ti-5%TiN immersed in Hank's solution