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Description
| - NiTi (Nitinol) based alloys are used as functional materials and/or metallic biomaterials. Their transformation characteristics and many properties can be modified by addition of some elements (Co, Cu, Hf, Nb, Zr), which probably change corrosion resistance and biocompatibility. For comparative corrosion tests the following alloys were used: Ni40-Ti50-Cu10, Ni50-Ti35-Cu15, Ni46-Ti50-Co4, Ni50-Ti42-Hf8, Ni50-Ti25-Nb15-Zr10, Ni50-Ti42-Zr8 and reference one Ni50-Ti50 (NiTi), which were prepared at the Department of Non-ferrous Metals, Refining and Recycling in VSB-TU Ostrava. Resistance to pitting was compared by depassivation and repassivation potential values, measured by standard potentiodynamic polarization method with artificial saliva. The positive influence of Cu addition (10-15%) was confirmed. Negligible change of pitting potentials values was recorded on NiTi with Co. Increased resistance to pitting was found out for NiTi alloys with Hf, Nb and Zr additions, and the best resistance was measured in the alloy Ni50-Ti25-Nb15-Zr10. After corrosion tests different pits and structures were observed by light microscopy. The values of polarization resistance and corrosion rates in passive state were also determined approximately.
- NiTi (Nitinol) based alloys are used as functional materials and/or metallic biomaterials. Their transformation characteristics and many properties can be modified by addition of some elements (Co, Cu, Hf, Nb, Zr), which probably change corrosion resistance and biocompatibility. For comparative corrosion tests the following alloys were used: Ni40-Ti50-Cu10, Ni50-Ti35-Cu15, Ni46-Ti50-Co4, Ni50-Ti42-Hf8, Ni50-Ti25-Nb15-Zr10, Ni50-Ti42-Zr8 and reference one Ni50-Ti50 (NiTi), which were prepared at the Department of Non-ferrous Metals, Refining and Recycling in VSB-TU Ostrava. Resistance to pitting was compared by depassivation and repassivation potential values, measured by standard potentiodynamic polarization method with artificial saliva. The positive influence of Cu addition (10-15%) was confirmed. Negligible change of pitting potentials values was recorded on NiTi with Co. Increased resistance to pitting was found out for NiTi alloys with Hf, Nb and Zr additions, and the best resistance was measured in the alloy Ni50-Ti25-Nb15-Zr10. After corrosion tests different pits and structures were observed by light microscopy. The values of polarization resistance and corrosion rates in passive state were also determined approximately. (en)
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Title
| - Testing and Evaluation of NiTiMe(Me=Co,Cu,Hf,Nb,Zr) Alloys Resistance to Pitting Corrosion
- Testing and Evaluation of NiTiMe(Me=Co,Cu,Hf,Nb,Zr) Alloys Resistance to Pitting Corrosion (en)
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skos:prefLabel
| - Testing and Evaluation of NiTiMe(Me=Co,Cu,Hf,Nb,Zr) Alloys Resistance to Pitting Corrosion
- Testing and Evaluation of NiTiMe(Me=Co,Cu,Hf,Nb,Zr) Alloys Resistance to Pitting Corrosion (en)
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skos:notation
| - RIV/61989100:27360/11:86081463!RIV12-MSM-27360___
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| - RIV/61989100:27360/11:86081463
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http://linked.open...riv/jazykVysledku
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http://linked.open.../riv/klicovaSlova
| - NiTi(Co,Cu,Hf,Nb, Zr) alloys, properties, potentiodynamic test, pitting (en)
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