Destructive and non-destructive assessment of the thickness of oxide layers of super-heater tubes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F19%3AN0000011" target="_blank" >RIV/26722445:_____/19:N0000011 - isvavai.cz</a>
Result on the web
<a href="https://arl.ujep.cz/arl-ujep/cs/contapp/?idx=ujep_us_cat*0268856&repo=ujeprepo&key=58776059461" target="_blank" >https://arl.ujep.cz/arl-ujep/cs/contapp/?idx=ujep_us_cat*0268856&repo=ujeprepo&key=58776059461</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21062/ujep/262.2019/a/1213-2489/mt/19/1/161" target="_blank" >10.21062/ujep/262.2019/a/1213-2489/mt/19/1/161</a>
Alternative languages
Result language
angličtina
Original language name
Destructive and non-destructive assessment of the thickness of oxide layers of super-heater tubes
Original language description
Tubes of super-heaters and heaters used in conventional power plants are exposed to coolant and high temperatures. The growing oxide layer on the inner surface reacts over time as a heat insulator on the water side and reduces heat transfer through the wall of the tube. A relatively thin oxide layer already contributes to the boiler efficiency and causes a permanent overheating of the tube wall. As a result of overheating at the site, the intercrystalline cracks leading to the bursting of the tube are developing. The secondary problem of the growth of oxide layer thickness is so-called exfoliation. For non-destructive evaluation of the thickness of the oxide layer directly at the power station, ultrasonic method (UT) can be used with a high frequency probe. In order to verify the accuracy of the measurement and the qualification of the ultrasonic testing methodology, light and Scanning Electron Microscopy (SEM) was used on specimens that were removed from the super-heater after the UT measurement. The standard longitudinal cut surface imaging in BackScatter Electrons (BSE) and Energy Dispersive Spectroscopy (EDS) analysis for accurate thickness determination with the chemical composition of the layer confirmed the accuracy of the UT measurement.
Czech name
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Czech description
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Classification
Type
J<sub>SC</sub> - Article in a specialist periodical, which is included in the SCOPUS database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Manufacturing Technology
ISSN
1213-2489
e-ISSN
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Volume of the periodical
19
Issue of the periodical within the volume
1
Country of publishing house
CZ - CZECH REPUBLIC
Number of pages
9
Pages from-to
161-169
UT code for WoS article
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EID of the result in the Scopus database
2-s2.0-85063330007