Influence of the Manufacturing Process on the Corrosion and Mechanical Behavior of Esophageals Stents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43928543" target="_blank" >RIV/60461373:22310/23:43928543 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/13/9/1542" target="_blank" >https://www.mdpi.com/2075-4701/13/9/1542</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met13091542" target="_blank" >10.3390/met13091542</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the Manufacturing Process on the Corrosion and Mechanical Behavior of Esophageals Stents

Popis výsledku v původním jazyce

&quot;Esophageal nitinol stents are an established method for treating swallowing difficulties caused by obstructing cancer. This raesearch investigates the influence of different qualities of raw metal alloys in combination with production technology on corrosion resistance in standardized simulated gastric fluid (SGF). Four different international stent manufacturers produced samples of their standard stents from nitinol sourced from three different alloy manufacturers. The stents were subjected to a 6-week immersion in SGF. During the immersion, the surface was studied at specified intervals using microscopy. The surface of the samples was also studied by X-ray Photoelectron Spectroscopy and after immersion the released ions were analyzed. Results demonstrated that both raw material and certain steps in the manufacturing process negatively affect corrosion resistance.Analysis of the SGF showed that the amount of nickel released is proportional to the degree ofcorrosion attack. Finally, current accepted standard test methods are inadequate for assessingsusceptibility to corrosion by gastric acid and should take the low pH of the implanted environmentinto account. Conversely, certain measures in the manufacturing process are able to reduce the impactof the base material on corrosion susceptibility.&quot;

Název v anglickém jazyce

Influence of the Manufacturing Process on the Corrosion and Mechanical Behavior of Esophageals Stents

Popis výsledku anglicky

&quot;Esophageal nitinol stents are an established method for treating swallowing difficulties caused by obstructing cancer. This raesearch investigates the influence of different qualities of raw metal alloys in combination with production technology on corrosion resistance in standardized simulated gastric fluid (SGF). Four different international stent manufacturers produced samples of their standard stents from nitinol sourced from three different alloy manufacturers. The stents were subjected to a 6-week immersion in SGF. During the immersion, the surface was studied at specified intervals using microscopy. The surface of the samples was also studied by X-ray Photoelectron Spectroscopy and after immersion the released ions were analyzed. Results demonstrated that both raw material and certain steps in the manufacturing process negatively affect corrosion resistance.Analysis of the SGF showed that the amount of nickel released is proportional to the degree ofcorrosion attack. Finally, current accepted standard test methods are inadequate for assessingsusceptibility to corrosion by gastric acid and should take the low pH of the implanted environmentinto account. Conversely, certain measures in the manufacturing process are able to reduce the impactof the base material on corrosion susceptibility.&quot;

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/FW03010583" target="_blank" >FW03010583: Řešení ochrany nitinolových stentů před korozním prostředím lidského organismu a nové přístupy při jejich testování</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Metals

ISSN

2075-4701

e-ISSN

2075-4701

Svazek periodika

19

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

001075948600001

EID výsledku v databázi Scopus

2-s2.0-85172779842