Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution
Laser powder bed fusion (L-PBF) produced NiTi alloys have significant potential in biomedical applications. Varying the parameters of the L-PBF process may result in the NiTi alloys with different ratios of B2 and B19′ phases, thereby, the different corrosion performance in the human body. However,...
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2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424029855 |
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| author | Yi-Fan Zhang Liang-Yu Chen Yong Liu Hong-Yu Yang Jin-Hua Peng Chuanbo Zheng Lina Zhang Lai-Chang Zhang |
| author_facet | Yi-Fan Zhang Liang-Yu Chen Yong Liu Hong-Yu Yang Jin-Hua Peng Chuanbo Zheng Lina Zhang Lai-Chang Zhang |
| author_sort | Yi-Fan Zhang |
| collection | DOAJ |
| description | Laser powder bed fusion (L-PBF) produced NiTi alloys have significant potential in biomedical applications. Varying the parameters of the L-PBF process may result in the NiTi alloys with different ratios of B2 and B19′ phases, thereby, the different corrosion performance in the human body. However, a dearth of research efforts remains dedicated to resolving this issue. This work employed three different but comparable sets of parameters in the L-PBF process to produce NiTi alloys with different ratios of B2 and B19′ phases. The corrosion behavior of samples in Hank's solutions with the addition of lactic acid and their evolution of passive films were investigated. The sample with the dominant B2 phase has a slower passive film formation rate and a higher corrosion rate than those with mixed B2/B19′ phases at the early film formation stage. As corrosion progresses, the passive films rapidly form within 24 h, followed by gradual degradation, represented by their varied charge transfer resistance. The degradation of passive films is attributed to the dissolution of NiO on the film surfaces, resulting from the hydration reaction. Such a phenomenon leads to imperfections in the passive films, diminishing their protective effectiveness for the underlying substrate. The sample with a faster film formation rate would also maintain a considerable corrosion resistance after film degradation. The presence of lactic acid accelerates the degradation of passive film and decreases the corrosion resistance of samples. This work advances the understanding of the relationship between the evolution of passive films and the processing parameters of L-PBF-produced NiTi alloys. |
| format | Article |
| id | doaj-art-f1afb3c13f1e402e8dc21c7adb3aca5b |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-f1afb3c13f1e402e8dc21c7adb3aca5b2025-01-19T06:25:44ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013419331946Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solutionYi-Fan Zhang0Liang-Yu Chen1Yong Liu2Hong-Yu Yang3Jin-Hua Peng4Chuanbo Zheng5Lina Zhang6Lai-Chang Zhang7School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, China; Foshan (Southern China) Institute for New Materials, Guangdong, Foshan, 528200, China; Corresponding author. School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, China.Foshan (Southern China) Institute for New Materials, Guangdong, Foshan, 528200, China; Corresponding author.Key Laboratory of Automobile Materials, Ministry of Education and Department of Materials Science and Engineering, Jilin University, Renmin Street No. 5988, Changchun, Jilin Province, 130025, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, ChinaSchool of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang Jiangsu, 212003, ChinaSchool of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia; Corresponding author.Laser powder bed fusion (L-PBF) produced NiTi alloys have significant potential in biomedical applications. Varying the parameters of the L-PBF process may result in the NiTi alloys with different ratios of B2 and B19′ phases, thereby, the different corrosion performance in the human body. However, a dearth of research efforts remains dedicated to resolving this issue. This work employed three different but comparable sets of parameters in the L-PBF process to produce NiTi alloys with different ratios of B2 and B19′ phases. The corrosion behavior of samples in Hank's solutions with the addition of lactic acid and their evolution of passive films were investigated. The sample with the dominant B2 phase has a slower passive film formation rate and a higher corrosion rate than those with mixed B2/B19′ phases at the early film formation stage. As corrosion progresses, the passive films rapidly form within 24 h, followed by gradual degradation, represented by their varied charge transfer resistance. The degradation of passive films is attributed to the dissolution of NiO on the film surfaces, resulting from the hydration reaction. Such a phenomenon leads to imperfections in the passive films, diminishing their protective effectiveness for the underlying substrate. The sample with a faster film formation rate would also maintain a considerable corrosion resistance after film degradation. The presence of lactic acid accelerates the degradation of passive film and decreases the corrosion resistance of samples. This work advances the understanding of the relationship between the evolution of passive films and the processing parameters of L-PBF-produced NiTi alloys.http://www.sciencedirect.com/science/article/pii/S2238785424029855Laser powder bed fusionCorrosion behaviorPassive filmNiTi alloy |
| spellingShingle | Yi-Fan Zhang Liang-Yu Chen Yong Liu Hong-Yu Yang Jin-Hua Peng Chuanbo Zheng Lina Zhang Lai-Chang Zhang Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution Journal of Materials Research and Technology Laser powder bed fusion Corrosion behavior Passive film NiTi alloy |
| title | Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution |
| title_full | Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution |
| title_fullStr | Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution |
| title_full_unstemmed | Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution |
| title_short | Corrosion behavior of NiTi alloys fabricated by laser powder bed fusion in relation to the formed passive films in Hank's solution |
| title_sort | corrosion behavior of niti alloys fabricated by laser powder bed fusion in relation to the formed passive films in hank s solution |
| topic | Laser powder bed fusion Corrosion behavior Passive film NiTi alloy |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424029855 |
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