Corrosion and passive film characteristics of 3D-printed NiTi shape memory alloys in artificial saliva

Ming Liu; Jia Ning Zhu; V. A. Popovich; E. Borisov; J. M.C. Mol; Y. Gonzalez-Garcia

doi:10.1007/s12598-023-02329-6

Corrosion and passive film characteristics of 3D-printed NiTi shape memory alloys in artificial saliva

Ming Liu^*, Jia Ning Zhu, V. A. Popovich, E. Borisov, J. M.C. Mol, Y. Gonzalez-Garcia

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

Electrochemical tests and surface analysis were applied to study the corrosion behavior and passive film characteristics of three-dimensional-printed NiTi shape memory alloys fabricated by laser-powder bed fusion (L-PBF) in artificial saliva at 37 °C. The passivity of L-PBF NiTi shows to be influenced by the process parameters and resulting morphological and physicochemical surface properties. The results show that the defects at the surface of L-PBF NiTi can promote the passivation rate in the early stages of exposure but a slowly formed passive film shows the best corrosion protection. The thickness of the passive film is positively correlated with its corrosion protective performance. The L-PBF NiTi alloy prepared at a linear energy density of 0.2 J·m⁻¹ and volumetric energy density of 56 J·mm⁻³ shows the least defects and best corrosion protection. An outer Ti-rich and inner Ni-rich dense passive film could be also obtained showing higher corrosion resistance. Graphic Abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	3114-3129
Journal	Rare Metals
Volume	42
Issue number	9
DOIs	https://doi.org/10.1007/s12598-023-02329-6
Publication status	Published - 2023

Keywords

Artificial saliva
Corrosion resistance
Laser-powder bed fusion (L-PBF)
NiTi
Passive film

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10.1007/s12598-023-02329-6

s12598-023-02329-6Final published version, 3.04 MBLicence: CC BY

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title = "Corrosion and passive film characteristics of 3D-printed NiTi shape memory alloys in artificial saliva",

abstract = "Electrochemical tests and surface analysis were applied to study the corrosion behavior and passive film characteristics of three-dimensional-printed NiTi shape memory alloys fabricated by laser-powder bed fusion (L-PBF) in artificial saliva at 37 °C. The passivity of L-PBF NiTi shows to be influenced by the process parameters and resulting morphological and physicochemical surface properties. The results show that the defects at the surface of L-PBF NiTi can promote the passivation rate in the early stages of exposure but a slowly formed passive film shows the best corrosion protection. The thickness of the passive film is positively correlated with its corrosion protective performance. The L-PBF NiTi alloy prepared at a linear energy density of 0.2 J·m−1 and volumetric energy density of 56 J·mm−3 shows the least defects and best corrosion protection. An outer Ti-rich and inner Ni-rich dense passive film could be also obtained showing higher corrosion resistance. Graphic Abstract: [Figure not available: see fulltext.]",

keywords = "Artificial saliva, Corrosion resistance, Laser-powder bed fusion (L-PBF), NiTi, Passive film",

author = "Ming Liu and Zhu, {Jia Ning} and Popovich, {V. A.} and E. Borisov and Mol, {J. M.C.} and Y. Gonzalez-Garcia",

year = "2023",

doi = "10.1007/s12598-023-02329-6",

language = "English",

volume = "42",

pages = "3114--3129",

journal = "Rare Metals",

issn = "1001-0521",

publisher = "University of Science and Technology Beijing",

number = "9",

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TY - JOUR

T1 - Corrosion and passive film characteristics of 3D-printed NiTi shape memory alloys in artificial saliva

AU - Liu, Ming

AU - Zhu, Jia Ning

AU - Popovich, V. A.

AU - Borisov, E.

AU - Mol, J. M.C.

AU - Gonzalez-Garcia, Y.

PY - 2023

Y1 - 2023

N2 - Electrochemical tests and surface analysis were applied to study the corrosion behavior and passive film characteristics of three-dimensional-printed NiTi shape memory alloys fabricated by laser-powder bed fusion (L-PBF) in artificial saliva at 37 °C. The passivity of L-PBF NiTi shows to be influenced by the process parameters and resulting morphological and physicochemical surface properties. The results show that the defects at the surface of L-PBF NiTi can promote the passivation rate in the early stages of exposure but a slowly formed passive film shows the best corrosion protection. The thickness of the passive film is positively correlated with its corrosion protective performance. The L-PBF NiTi alloy prepared at a linear energy density of 0.2 J·m−1 and volumetric energy density of 56 J·mm−3 shows the least defects and best corrosion protection. An outer Ti-rich and inner Ni-rich dense passive film could be also obtained showing higher corrosion resistance. Graphic Abstract: [Figure not available: see fulltext.]

AB - Electrochemical tests and surface analysis were applied to study the corrosion behavior and passive film characteristics of three-dimensional-printed NiTi shape memory alloys fabricated by laser-powder bed fusion (L-PBF) in artificial saliva at 37 °C. The passivity of L-PBF NiTi shows to be influenced by the process parameters and resulting morphological and physicochemical surface properties. The results show that the defects at the surface of L-PBF NiTi can promote the passivation rate in the early stages of exposure but a slowly formed passive film shows the best corrosion protection. The thickness of the passive film is positively correlated with its corrosion protective performance. The L-PBF NiTi alloy prepared at a linear energy density of 0.2 J·m−1 and volumetric energy density of 56 J·mm−3 shows the least defects and best corrosion protection. An outer Ti-rich and inner Ni-rich dense passive film could be also obtained showing higher corrosion resistance. Graphic Abstract: [Figure not available: see fulltext.]

KW - Artificial saliva

KW - Corrosion resistance

KW - Laser-powder bed fusion (L-PBF)

KW - NiTi

KW - Passive film

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U2 - 10.1007/s12598-023-02329-6

DO - 10.1007/s12598-023-02329-6

M3 - Article

AN - SCOPUS:85163282889

SN - 1001-0521

VL - 42

SP - 3114

EP - 3129

JO - Rare Metals

JF - Rare Metals

IS - 9

ER -

Corrosion and passive film characteristics of 3D-printed NiTi shape memory alloys in artificial saliva

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