Electrochemical behavior of Ni-Ti alloy after surface modification

• Autorzy: Kaczmarek, M. , Simka, W. , Baron, A. , Szewczenko, J. , Marciniak, J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The shape memory effect and superelasticity make the nickel-titanium alloy an interesting material for medical applications. But the biocompatibility has been questioned due to conflicting results in the literature. The latest research has shown that this situation may be caused by a variation in NiTi surface treatment. The appropriate surface treatment increases the corrosion resistance. The paper presents the electrochemical behavior of NiTi alloy after surface modification with the use of various techniques. Design/methodology/approach: The evaluation of the electrochemical behavior of NiTi alloy was realized both by recording of anodic polarization curves with the use of the potentiodynamic method and by an electrochemical impedance spectroscopy technique (EIS). Findings: Surface condition of metallic biomaterial determines its corrosion resistance. In the course of the work it was observed that the lowest values of corrosion current were recorded for the sterilized and the thermally passivated samples. The highest values of corrosion current were recorded for the ground samples. These samples obviously had also the highest corrosion rate. Research limitations/implications: The obtained results are the basis for the optimization of physicochemical properties of the metallic biomaterial. The future research should be focused on selected specific implants specially with respect to their application features. Practical implications: On the basis of the obtained results it can be stated that the suggested surface treatment can be applicable for medical implants due to the increase of the corrosion resistance and in consequence the increase of biocompatibility. Originality/value: The paper presents the influence of various methods of the surface treatment on corrosion resistance of the NiTi alloy. The suggested methods can be applied in treatment of the material intended for medical applications especially in cases where the surface roughness plays important role.

Słowa kluczowe

PL

stopy metali; biomateriały; korozja; roztwór fizjologiczny

EN

metallic alloys; biomaterials; corrosion; Tyrode’s physiological solution

• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 18, nr 1-2
• Strony: 111--114
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Kaczmarek, M.

• Division of, Biomedical Engineering Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

autor

Simka, W.

• Division of, Chemistry and Inorganic Technology, Silesian University of Technology, 44-100 Gliwice, Poland

autor

Baron, A.

• Division of, Biomedical Engineering Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Szewczenko, J.

• Division of, Biomedical Engineering Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

autor

Marciniak, J.

• Division of, Biomedical Engineering Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland

Bibliografia

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