In vitro corrosion study by EIS of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel

G. Rondelli, P. Torricelli, M. Fini, L. Rimondini, R. Giardino

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The electrochemical impedance spectroscopy (EIS) technique was used for the study of the electrochemical behavior of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel type ASTM F138. Experiments were carried out using four different different test solutions: phosphate buffered saline (PBS), Dulbecco minimum essential medium (MEM), MEM + fetal calf serum (FCS), and MEM + fetal calf serum + fibroblast cell (CELL). Specimens were finished to 600-grit SiC paper and were tested in conditions that did not provoke abrupt mechanical damage of the passive film. Bode-phase spectra showed the presence of two maxima and were fitted with an equivalent circuit characterized by two parallel combinations (R, resistance; CPE, constant phase element). The R1 and CPE1 branch was assigned to the inner compact passive film and the R2 and CPE2 branch to the external porous film. The resistance of the inner film R1, roughly corresponding to the polarization resistance (Rp), which is inversely proportional to the material's corrosion rate, increased with the immersion time and was generally greater in PBS than in other media. With the exception of FCS solution, Rp for NiTi alloy is better or similar to that of ASTM F138.

Original languageEnglish
Pages (from-to)320-324
Number of pages5
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume79
Issue number2
DOIs
Publication statusPublished - Nov 2006

Fingerprint

Dielectric Spectroscopy
Corrosion
Stainless Steel
Electrochemical impedance spectroscopy
Stainless steel
Serum
Phosphates
Immersion
Fibroblasts
Corrosion rate
Equivalent circuits
Cells
Polarization
In Vitro Techniques
Experiments

Keywords

  • Corrosion
  • Electrochemistry
  • In vitro test
  • Shape memory alloy
  • Stainless steel

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

In vitro corrosion study by EIS of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel. / Rondelli, G.; Torricelli, P.; Fini, M.; Rimondini, L.; Giardino, R.

In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, Vol. 79, No. 2, 11.2006, p. 320-324.

Research output: Contribution to journalArticle

@article{ea1ff559a6074ae5b1becbd9aad855c5,
title = "In vitro corrosion study by EIS of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel",
abstract = "The electrochemical impedance spectroscopy (EIS) technique was used for the study of the electrochemical behavior of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel type ASTM F138. Experiments were carried out using four different different test solutions: phosphate buffered saline (PBS), Dulbecco minimum essential medium (MEM), MEM + fetal calf serum (FCS), and MEM + fetal calf serum + fibroblast cell (CELL). Specimens were finished to 600-grit SiC paper and were tested in conditions that did not provoke abrupt mechanical damage of the passive film. Bode-phase spectra showed the presence of two maxima and were fitted with an equivalent circuit characterized by two parallel combinations (R, resistance; CPE, constant phase element). The R1 and CPE1 branch was assigned to the inner compact passive film and the R2 and CPE2 branch to the external porous film. The resistance of the inner film R1, roughly corresponding to the polarization resistance (Rp), which is inversely proportional to the material's corrosion rate, increased with the immersion time and was generally greater in PBS than in other media. With the exception of FCS solution, Rp for NiTi alloy is better or similar to that of ASTM F138.",
keywords = "Corrosion, Electrochemistry, In vitro test, Shape memory alloy, Stainless steel",
author = "G. Rondelli and P. Torricelli and M. Fini and L. Rimondini and R. Giardino",
year = "2006",
month = "11",
doi = "10.1002/jbm.b.30545",
language = "English",
volume = "79",
pages = "320--324",
journal = "Journal of Biomedical Materials Research - Part A",
issn = "1549-3296",
publisher = "John Wiley and Sons Inc.",
number = "2",

}

TY - JOUR

T1 - In vitro corrosion study by EIS of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel

AU - Rondelli, G.

AU - Torricelli, P.

AU - Fini, M.

AU - Rimondini, L.

AU - Giardino, R.

PY - 2006/11

Y1 - 2006/11

N2 - The electrochemical impedance spectroscopy (EIS) technique was used for the study of the electrochemical behavior of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel type ASTM F138. Experiments were carried out using four different different test solutions: phosphate buffered saline (PBS), Dulbecco minimum essential medium (MEM), MEM + fetal calf serum (FCS), and MEM + fetal calf serum + fibroblast cell (CELL). Specimens were finished to 600-grit SiC paper and were tested in conditions that did not provoke abrupt mechanical damage of the passive film. Bode-phase spectra showed the presence of two maxima and were fitted with an equivalent circuit characterized by two parallel combinations (R, resistance; CPE, constant phase element). The R1 and CPE1 branch was assigned to the inner compact passive film and the R2 and CPE2 branch to the external porous film. The resistance of the inner film R1, roughly corresponding to the polarization resistance (Rp), which is inversely proportional to the material's corrosion rate, increased with the immersion time and was generally greater in PBS than in other media. With the exception of FCS solution, Rp for NiTi alloy is better or similar to that of ASTM F138.

AB - The electrochemical impedance spectroscopy (EIS) technique was used for the study of the electrochemical behavior of an equiatomic NiTi alloy and an implant quality AISI 316 stainless steel type ASTM F138. Experiments were carried out using four different different test solutions: phosphate buffered saline (PBS), Dulbecco minimum essential medium (MEM), MEM + fetal calf serum (FCS), and MEM + fetal calf serum + fibroblast cell (CELL). Specimens were finished to 600-grit SiC paper and were tested in conditions that did not provoke abrupt mechanical damage of the passive film. Bode-phase spectra showed the presence of two maxima and were fitted with an equivalent circuit characterized by two parallel combinations (R, resistance; CPE, constant phase element). The R1 and CPE1 branch was assigned to the inner compact passive film and the R2 and CPE2 branch to the external porous film. The resistance of the inner film R1, roughly corresponding to the polarization resistance (Rp), which is inversely proportional to the material's corrosion rate, increased with the immersion time and was generally greater in PBS than in other media. With the exception of FCS solution, Rp for NiTi alloy is better or similar to that of ASTM F138.

KW - Corrosion

KW - Electrochemistry

KW - In vitro test

KW - Shape memory alloy

KW - Stainless steel

UR - http://www.scopus.com/inward/record.url?scp=33750460950&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33750460950&partnerID=8YFLogxK

U2 - 10.1002/jbm.b.30545

DO - 10.1002/jbm.b.30545

M3 - Article

C2 - 16850480

AN - SCOPUS:33750460950

VL - 79

SP - 320

EP - 324

JO - Journal of Biomedical Materials Research - Part A

JF - Journal of Biomedical Materials Research - Part A

SN - 1549-3296

IS - 2

ER -