Pulse and DC Electropolishing of Stainless Steel for Stents and Other Devices

Bhuyan, Abani K.; Gregory, B.; Lei, Hao; Yee, Seow Yuen; Gianchandani, Yogesh B.

doi:10.1109/icsens.2005.1597699

Cited by 18 publications

(20 citation statements)

References 11 publications

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“…One approach is to enhance the hydrophilic property of the inner surface of the needle. This can be done by improving the wettability of the steel through surface treatments [7][8][9] or SiO2 coating [10]. The electropolishing method discussed in [9] using commercially-available EPS4000 (a solution based on a mixture of phosphoric and sulfuric acids) was tested on a bare stainless steel 304 sample.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…This can be done by improving the wettability of the steel through surface treatments [7][8][9] or SiO2 coating [10]. The electropolishing method discussed in [9] using commercially-available EPS4000 (a solution based on a mixture of phosphoric and sulfuric acids) was tested on a bare stainless steel 304 sample. The water contact angle improved from 940 before polishing to z340 after polishing, indicating the improved wettability of the electropolished surface.…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…2 and 3. A steel micro-needle is mounted on a miniature blood reservoir with a target volume of [1][2][3][4][5][6][7][8][9][10] [tL. An opening channel formed on the wall of the reservoir permits air to leave the cavity during sampling, or interface with additional components for in-situ sample analysis during PK studies.…”

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confidence: 99%

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An in Vivo Blood Microsampling Device for Pharmacokinetic Applications

Barnett

Xiao

et al. 2007

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference

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This paper describes an in vivo microsystem for automated blood microsampling from a lab mouse for pharmacokinetic (PK) studies. Intended to be mounted as a "backpack" on a mouse, it uses a micro-needle, reservoir, and an actuator. It is designed to suddenly prick the animal for a time-point sample, minimizing the potential impact of stress-related endocrine changes. The blood is collected by the 33-gauge micro-needle (210 pim OD) into the 1 [tL micro-electro-discharge machined steel reservoir. The small volume enables repeated sampling, permitting a full PK profile to be obtained from a single mouse. The voice coil actuator provides a peak force of z170 mN, which can easily pierce the needle through mouse skin. The device was tested for blood vessel sampling using a mock vessel with adjustable pressure, and the reservoir was filled in <0.15 sec by a combination of the capillary effect and blood pressure. For interstitial fluid sampling, the capillary effect of the needle inner surface was enhanced by electropolishing. Blood from fresh bovine tissue was collected into the reservoir to simulate interstitial fluid sampling.

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Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Experimental Results and Analysismentioning

confidence: 99%

See 1 more Smart Citation

An in Vivo Blood Microsampling Device for Pharmacokinetic Applications

Barnett

Xiao

et al. 2007

TRANSDUCERS 2007 - 2007 International Solid-State Sensors, Actuators and Microsystems Conference

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“…Their aim is to improve the smoothing of surface and to decrease bath contamination. Benefi cial results may be obtained if these compounds are absorbed in indentations that exist on the surface of stainless steel [8][9] . The applied additives should also prolong the period of operation of the bath, i.e.…”

Section: Introductionmentioning

confidence: 99%

Improvement of the stainless steel electropolishing process by organic additives

Lochyński

Kowalski

Szczygieł

et al. 2016

Polish Journal of Chemical Technology

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The infl uence of organic additives on the process of surface electropolishing of AISI 304 type steel was determined. Additives were selected in initial potentiodynamic tests pursuant to the plateau analysis on the current/potential curves. The assessment of the operational effectiveness of additives consisted in determining the relationship between surface gloss after electropolishing and the mass loss of the sample and in determining surface roughness. The applied electropolishing bath consisted of a mixture of concentrated acids: H 3 PO 4 and H 2 SO 4 , and the following organic additives were used: triethylamine, ethanolamine, diethanolamine, triethanolamine, diethylene glycol monobutyl ether and glycerol. The best electropolishing result, i.e. low roughness and high gloss of stainless steel surface with a relatively low mass loss of the sample at the same time were obtained for baths containing triethanolamine.

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“…These values indicate that the electropolished surface is rougher, has a higher density of peaks, and sharper asperities than the mechanical polished surface. Bhuyan et al (2005) reported that a more efficient control of the electrolytic polishing parameters, such as electrolyte temperature, current density, polishing time and pulsed current application, is necessary to adjust the flatness and to avoid the majority of pitting formation on these surfaces.…”

Section: Soft Matrix (Homogeneous Material)mentioning

confidence: 99%

Evaluation of abrasive mechanisms in metallic alloys during scratch tests: a numerical-experimental study in micro-scale.

Seriacopi¹

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Pulse and DC Electropolishing of Stainless Steel for Stents and Other Devices

Cited by 18 publications

References 11 publications

An in Vivo Blood Microsampling Device for Pharmacokinetic Applications

An in Vivo Blood Microsampling Device for Pharmacokinetic Applications

Improvement of the stainless steel electropolishing process by organic additives

Evaluation of abrasive mechanisms in metallic alloys during scratch tests: a numerical-experimental study in micro-scale.

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