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Surface Modification of Nitinol by Biocompatible Passive Films
ECS Transactions, 2010Nitinol, near-equiatomic nickel-titanium alloy, exhibits unique properties, shape memory effect and superelasticity, and is therefore of a huge importance in biochemical engineering for medical devices. The high corrosion resistivity and biocompatibility are required in application of Nitinol as implant material for cardiovascular stents and ...
Katić, Jozefina +1 more
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The capacity of thin passive films
Journal of Electroanalytical Chemistry, 1980Abstract The capacity of thin passive films on metal electrodes is investigated. Two contributions are reported: one from the space charge in the film and one from the surface charge on the underlying metal. In the usual Schottky-Mott plot such films also exhibit a linear region, but this cannot ordinarily be used to obtain the carrier concentration ...
Shahed U.M. Khan, Wolfgang Schmickler
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MRS Proceedings, 1990
ABSTRACTAlthough wafer curvature measurement provides a rapid and accurate determination of stress in a uniform thin film, the technique is not applicable to patterned films. To study the stress in metal lines, and the effect of passivation on that stress, it is necessary to use X-ray diffraction.
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ABSTRACTAlthough wafer curvature measurement provides a rapid and accurate determination of stress in a uniform thin film, the technique is not applicable to patterned films. To study the stress in metal lines, and the effect of passivation on that stress, it is necessary to use X-ray diffraction.
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Corrosion Resistance of Artificial Passive Film and Real Passive Film on Fe-Ti Alloy
Metals and Materials, 1998The corrosion resistances of Fe2O3-TiO2 artificial passive film and real passive film on the sputter-deposited Fe-Ti alloy films were examined in acid solutions. The Fe2O3-TiO2 films containing less than XTi=0.70 have a spinal structure, the films containing more than XTi=0.70 have an amorphous structure. The dissolution rate of the Fe2O2-TiO2 films in
Hyunsoo Kim +2 more
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Zeitschrift für Elektrochemie, Berichte der Bunsengesellschaft für physikalische Chemie, 1958
AbstractAn “Inhibitor” is something added to a corrosive liquid to render it non‐corrosive; “passivity” is a change in the metal remaining after it has emerged from the “inhibiting” bath, enabling it to resist liquids which normally would corrode it. The object of the paper is to ask whether passivity is due to (1) a three‐dimensional film (2) a two ...
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AbstractAn “Inhibitor” is something added to a corrosive liquid to render it non‐corrosive; “passivity” is a change in the metal remaining after it has emerged from the “inhibiting” bath, enabling it to resist liquids which normally would corrode it. The object of the paper is to ask whether passivity is due to (1) a three‐dimensional film (2) a two ...
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Breakdown of Passive Film on Iron
Corrosion, 1984The breakdown of passive films potentiostatically formed on iron in borate and phosphate solutions of pH 8.42 and 11.50 is investigated in 0.5 kmol/m3 NaCl solution at a constant potential of –0.195 V(SHE) higher than a critical pitting potential of –0.295 V in the same solution. The investigation revealed that the logarithmic plots for pitting current
Rokuro Nishimura +2 more
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STUDY OF PASSIVATED FILMS OF GaSb
Modern Physics Letters B, 2001Thin anodie oxides (5-10 μm) were formed on n-GaSb (100) substrates by electrochemical method under galvanostatic regime employing an aqueous solution (citric acid/hydrogen peroxide), at volume ratio of 5:1, changing the time of growth. The thickness and index of refraction, thermal diffusivity and quality of passivated films were obtained by IR ...
M. I. REYES-VALDERRAMA +4 more
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The breakdown of passive films on iron
Corrosion Science, 1988Abstract Experimental measurements of pit initiation potential support the idea that the first stages of localized passive film breakdown depend upon the competition for adsorption, at the oxide/liquid interface, between hydroxyl ions and aggressive anions such as the chloride ion.
H.E.H. Bird, B.R. Pearson, P.A. Brook
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Growth and dissolution of passivating films
Corrosion Science, 1990Abstract A general theory for the steady state uniform corrosion of passive metals and alloys is described and compared to experimental results referring to oxide films on iron-chromium and iron-nickel alloys and cadmium sulfide films on cadmium. It is also shown that passivation of iron generates large compressive surface stresses.
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Growth kinetics of passive films
Electrochimica Acta, 1987A new model of growth of passive films is presented which includes both the transport through the film in the presence of a strong and varying electric field and the transport through the film—electrolyte interface by a reaction with a varying potential drop at the interface.
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