Journal
CORROSION SCIENCE
Volume 189, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2021.109609
Keywords
Selective laser melting; Titanium; Corrosion; Oxide films; Electrochemical calculation
Funding
- National Key Research and Development Program [2016YFB1100101]
- Guangdong Science and Technology Program [2019B090905009]
- Key Research and Development Program of Shaanxi [2021KWZ-13]
- Jiangsu Province Six Talent Peaks Project [XCL-117]
- Open Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials [2021GXYSOF03]
- ECU Postgraduate Research Scholarship
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This study investigated the corrosion behavior and mechanism of SLM Ti35Nb separately processed with mixed powder and pre-alloyed powder in Hank's solution. Both samples showed similar corrosion behavior, but the pre-alloyed powder had more stable oxide films, while distinct oxide films formed on the TiNb and Nb regions in the mixed powder.
This work investigated the corrosion behavior and mechanism of selective laser melted (SLM) Ti35Nb separately using mixed powder (Ti35Nb-M) and pre-alloyed powder (Ti35Nb-P) in Hank's solution. Both types of samples demonstrate similar corrosion behavior, and double-layered oxide films form on the TiNb regions in both Ti35Nb-M and Ti35Nb-P. However, Ti35Nb-P has more stable oxide films than Ti35Nb-M because the outer porous oxide layer formed on Ti35Nb-P has smaller thickness and less defects according to Mott-Schottky analysis. Distinct oxide films also form on the TiNb and Nb regions in Ti35Nb-M due to unmelted Nb particles.
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