Structure and corrosion properties of electrochemically treated surface of 1.4301 (AISI 304) steel for medical applications

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Structure and corrosion properties of electrochemically treated surface of 1.4301 (AISI 304) steel for medical applications

Popis výsledku v původním jazyce

1.4301 steel as a basic stainless material used for undemanding applications is studied in this paper. Some of surgical instruments as well as other medical devices are manufactured from this material so its biocompatibility and corrosion resistance must be guaranteed. Electrochemical properties of this steel are closely connected to oxidic layers created on surface of material, so these properties can be improved by modification of the layer. This paper is basically focused on anodization process of substrate to gain enhanced corrosion properties. The structure of substrate was studied before and after anodization by light and electron microscopy, for basic chemical analysis of structural components of substrate before anodization and structure of created layers on surface EDX analysis was used. Relation between wettability of surface and parameters of anodization was studied. Electrochemical behaviour of anodized materials was tested in Tyrode's solution. Open circuit potentials were found, corrosion potentials, polarization resistances or corrosion rates were determined by Tafel and Stern methods. Potentials of depassition and repassivation were measured by potentiodynamic polarization method. Electrochemical impedance spectroscopy was use for even closer description of physical characteristics of layer deposited during the anodization. For this equivalent electric circuit was found and parameters like resistance and capacitance of the layer were specified. Process of anodization is partially similar to electrochemical etching, so the relation between parameters of anodization and surface profile are also studied in this paper.

Název v anglickém jazyce

Structure and corrosion properties of electrochemically treated surface of 1.4301 (AISI 304) steel for medical applications

Popis výsledku anglicky

1.4301 steel as a basic stainless material used for undemanding applications is studied in this paper. Some of surgical instruments as well as other medical devices are manufactured from this material so its biocompatibility and corrosion resistance must be guaranteed. Electrochemical properties of this steel are closely connected to oxidic layers created on surface of material, so these properties can be improved by modification of the layer. This paper is basically focused on anodization process of substrate to gain enhanced corrosion properties. The structure of substrate was studied before and after anodization by light and electron microscopy, for basic chemical analysis of structural components of substrate before anodization and structure of created layers on surface EDX analysis was used. Relation between wettability of surface and parameters of anodization was studied. Electrochemical behaviour of anodized materials was tested in Tyrode's solution. Open circuit potentials were found, corrosion potentials, polarization resistances or corrosion rates were determined by Tafel and Stern methods. Potentials of depassition and repassivation were measured by potentiodynamic polarization method. Electrochemical impedance spectroscopy was use for even closer description of physical characteristics of layer deposited during the anodization. For this equivalent electric circuit was found and parameters like resistance and capacitance of the layer were specified. Process of anodization is partially similar to electrochemical etching, so the relation between parameters of anodization and surface profile are also studied in this paper.

Druh

D - Stať ve sborníku

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

METAL 2016: conference proceedings : (reviewed version) : 25th Anniversary International Conference on Metallurgy and Materials : May 25th-27th 2016, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-67-3

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

1061-1066

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

25. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000391251200172