Journal
CORROSION SCIENCE
Volume 111, Issue -, Pages 703-710Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2016.06.009
Keywords
Titanium; X-ray diffraction; EIS; SEM; Passivity
Funding
- Australian Research Council [DP110101653]
- Science and Technology Commission of Shanghai Municipality [14DZ2261000]
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Electrochemical measurements and microstructural analysis were performed to study the corrosion resistance of different planes of Ti-6Al-4V alloy manufactured by selective laser melting (SLM). The electrochemical results suggest that its XY-plane possesses a better corrosion resistance compared to XZ-plane in 1 M HCl solution, in spite of slight difference in 3.5 wt.% NaCl solution, suggesting that the different planes exhibit more pronounced distinction in corrosion resistance in harsher solution system. The inferior corrosion resistance of XZ-plane is attributed to the presence of more alpha' martensite and less beta-Ti phase in microstructure for XZ-plane than for XY-plane of the SLM-produced Ti-6Al-4V alloy. (C) 2016 Elsevier Ltd. All rights reserved.
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