Ultrasonic Thickness Measurement of Internal Oxide Scale

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F17%3AN0000148" target="_blank" >RIV/26722445:_____/17:N0000148 - isvavai.cz</a>

Výsledek na webu

<a href="http://susen2020.cz/en/nuclear-technologies-for-21st-century-international-conference-in-rez/" target="_blank" >http://susen2020.cz/en/nuclear-technologies-for-21st-century-international-conference-in-rez/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Ultrasonic Thickness Measurement of Internal Oxide Scale

Popis výsledku v původním jazyce

The iron oxide scale (magnetite) grows on the inside and outside tube surfaces. Their presence on the inside surface of the boiler steam tubes is a serious problem. The scales act as a thermal insulator on the water side and reducing the heat transfer through the tube wall. The tube wall is chronic overheated and it can accelerate metallurgical failure. Ultrasonic pulse/echo thickness measurement techniques are used for internal oxide scale measurement. This measurement is performed by ultrasonic technique using high frequency (20MHz) broadband probe with single-element transducers and shear waves. Thickness of the inner scale is calculated from distance between relevant echoes, i.e. proper reflections from the metal-oxide interface and the oxide-air interface. Measured thicknesses are in range from 20 mm up to millimeters. Correct setting of ultrasonic device in a laboratory was verified during in-site measurement and by destructive check of the scale thickness by metallography.

Název v anglickém jazyce

Ultrasonic Thickness Measurement of Internal Oxide Scale

Popis výsledku anglicky

The iron oxide scale (magnetite) grows on the inside and outside tube surfaces. Their presence on the inside surface of the boiler steam tubes is a serious problem. The scales act as a thermal insulator on the water side and reducing the heat transfer through the tube wall. The tube wall is chronic overheated and it can accelerate metallurgical failure. Ultrasonic pulse/echo thickness measurement techniques are used for internal oxide scale measurement. This measurement is performed by ultrasonic technique using high frequency (20MHz) broadband probe with single-element transducers and shear waves. Thickness of the inner scale is calculated from distance between relevant echoes, i.e. proper reflections from the metal-oxide interface and the oxide-air interface. Measured thicknesses are in range from 20 mm up to millimeters. Correct setting of ultrasonic device in a laboratory was verified during in-site measurement and by destructive check of the scale thickness by metallography.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Nuclear Technologies for the 21st Centruy, September 13th 2017

ISBN

978-80-270-3233-4

ISSN

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e-ISSN

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Počet stran výsledku

7

Strana od-do

69-75

Název nakladatele

Centrum výzkumu Řež, s.r.o

Místo vydání

Řež

Místo konání akce

Řež

Datum konání akce

13. 9. 2017

Typ akce podle státní příslušnosti

CST - Celostátní akce

Kód UT WoS článku

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