Corrosion behavior of DLC-coated NiTi alloy in the presence of serum proteins

Ruiqiang Hang; Shengli Ma; Paul K. Chu

doi:10.1016/j.diamond.2010.06.012

Corrosion behavior of DLC-coated NiTi alloy in the presence of serum proteins

Ruiqiang Hang, Shengli Ma, Paul K. Chu

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

29 Citations (Scopus)

Abstract

Uniform and adherent diamond-like carbon (DLC) coatings are deposited on NiTi alloy by arc enhanced magnetron sputtering (AEMS). The effects of serum proteins, bovine serum albumin (BSA) and fibrinogen (Fib) on the corrosion behavior of DLC-coated NiTi alloy in phosphate buffer saline (PBS) solution are investigated at 37 °C using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. The results show that DLC coatings, which enhance the corrosion resistance of the NiTi alloy especially in the presence of BSA, move the OCP to the positive direction, increase the polarization resistance, lower the corrosion current density, and enhance the breakdown potential. The presence of fibrinogen shows the similar effect but less notable than BSA. The associated mechanism is also discussed. © 2010 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	1230-1234
Journal	Diamond and Related Materials
Volume	19
Issue number	10
DOIs	https://doi.org/10.1016/j.diamond.2010.06.012
Publication status	Published - Oct 2010

Research Keywords

Corrosion
Diamond-like carbon
Nickel-titanium
Proteins

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10.1016/j.diamond.2010.06.012

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title = "Corrosion behavior of DLC-coated NiTi alloy in the presence of serum proteins",

abstract = "Uniform and adherent diamond-like carbon (DLC) coatings are deposited on NiTi alloy by arc enhanced magnetron sputtering (AEMS). The effects of serum proteins, bovine serum albumin (BSA) and fibrinogen (Fib) on the corrosion behavior of DLC-coated NiTi alloy in phosphate buffer saline (PBS) solution are investigated at 37 °C using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. The results show that DLC coatings, which enhance the corrosion resistance of the NiTi alloy especially in the presence of BSA, move the OCP to the positive direction, increase the polarization resistance, lower the corrosion current density, and enhance the breakdown potential. The presence of fibrinogen shows the similar effect but less notable than BSA. The associated mechanism is also discussed. {\textcopyright} 2010 Elsevier B.V. All rights reserved.",

keywords = "Corrosion, Diamond-like carbon, Nickel-titanium, Proteins",

author = "Ruiqiang Hang and Shengli Ma and Chu, {Paul K.}",

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publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Corrosion behavior of DLC-coated NiTi alloy in the presence of serum proteins

AU - Hang, Ruiqiang

AU - Ma, Shengli

AU - Chu, Paul K.

PY - 2010/10

Y1 - 2010/10

N2 - Uniform and adherent diamond-like carbon (DLC) coatings are deposited on NiTi alloy by arc enhanced magnetron sputtering (AEMS). The effects of serum proteins, bovine serum albumin (BSA) and fibrinogen (Fib) on the corrosion behavior of DLC-coated NiTi alloy in phosphate buffer saline (PBS) solution are investigated at 37 °C using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. The results show that DLC coatings, which enhance the corrosion resistance of the NiTi alloy especially in the presence of BSA, move the OCP to the positive direction, increase the polarization resistance, lower the corrosion current density, and enhance the breakdown potential. The presence of fibrinogen shows the similar effect but less notable than BSA. The associated mechanism is also discussed. © 2010 Elsevier B.V. All rights reserved.

AB - Uniform and adherent diamond-like carbon (DLC) coatings are deposited on NiTi alloy by arc enhanced magnetron sputtering (AEMS). The effects of serum proteins, bovine serum albumin (BSA) and fibrinogen (Fib) on the corrosion behavior of DLC-coated NiTi alloy in phosphate buffer saline (PBS) solution are investigated at 37 °C using open circuit potential (OCP), electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization measurements. The results show that DLC coatings, which enhance the corrosion resistance of the NiTi alloy especially in the presence of BSA, move the OCP to the positive direction, increase the polarization resistance, lower the corrosion current density, and enhance the breakdown potential. The presence of fibrinogen shows the similar effect but less notable than BSA. The associated mechanism is also discussed. © 2010 Elsevier B.V. All rights reserved.

KW - Corrosion

KW - Diamond-like carbon

KW - Nickel-titanium

KW - Proteins

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DO - 10.1016/j.diamond.2010.06.012

M3 - RGC 21 - Publication in refereed journal

SN - 0925-9635

VL - 19

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EP - 1234

JO - Diamond and Related Materials

JF - Diamond and Related Materials

IS - 10

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Corrosion behavior of DLC-coated NiTi alloy in the presence of serum proteins

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Research Keywords

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