About: Testing and Evaluation of NiTiMe(Me=Co,Cu,Hf,Nb,Zr) Alloys Resistance to Pitting Corrosion

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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)
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)
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)
skos:notation	RIV/61989100:27360/11:86081463!RIV12-MSM-27360___
http://linked.open...avai/riv/aktivita	I
http://linked.open...avai/riv/aktivity	I
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Lasek, Stanislav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Fakulta metalurgie a materiálového inženýrství
http://linked.open...dnocenehoVysledku	234893
http://linked.open...ai/riv/idVysledku	RIV/61989100:27360/11:86081463
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	NiTi(Co,Cu,Hf,Nb, Zr) alloys, properties, potentiodynamic test, pitting (en)
http://linked.open.../riv/klicoveSlovo	pitting Cu Hf NiTi(Co Zr) alloys potentiodynamic test properties Nb
http://linked.open...odStatuVydavatele	CZ - Česká republika
http://linked.open...ontrolniKodProRIV	[073C8A6F4C79]
http://linked.open...i/riv/nazevZdroje	Hutnické listy
http://linked.open...in/vavai/riv/obor	JK
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	64
http://linked.open...iv/tvurceVysledku	Lasek, Stanislav
issn	0018-8069
number of pages	5 (xsd:int)
http://localhost/t...ganizacniJednotka	27360

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