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| Titel: |
Effect of laser polishing on the surface roughness and corrosion resistance of Nitinol stents |
| Auteur: |
Park, Chan-Hee Tijing, Leonard D. Pant, Hem Raj Kim, Cheol Sang |
| Verschenen in: |
Bio-medical materials and engineering |
| Paginering: | Jaargang 25 (2015) nr. 1 pagina's 67-75 |
| Jaar: |
2015-01-13 |
| Inhoud: |
In this paper, we investigated the effect of laser polishing at different treatment times on the surface roughness and corrosion resistance of a biliary nickel–titanium (NiTi or Nitinol) stent. A specific area of the stent wire surface was checked for changes in roughness by scanning electron microscopy (SEM) and a noncontact profilometer. The corrosion resistance was assessed by potentiodynamic polarization test and electrochemical impedance spectroscopy. The surface characterization revealed that laser polishing reduced the surface roughness of stent by 34–64% compared to that of the as-received stent surface condition depending on the treatment time (i.e., 700–1600 μm). Measurements using potentiodynamic polarization in simulated body fluid solution showed better anti-corrosion performance of laser-polished stent compared to magnetically-polished stent and has comparable corrosion resistance with the as-received stent condition. In this paper, we have shown a preliminary study on the potential of laser polishing for the improvement of surface roughness of stent without affecting much its corrosion resistance. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 10 gevonden artikelen
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