Characteristics of metallographic preparation of heat exchanger austenitic stainless steels

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60193247%3A_____%2F21%3AN0000004" target="_blank" >RIV/60193247:_____/21:N0000004 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21220/21:00352180
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Characteristics of metallographic preparation of heat exchanger austenitic stainless steels
Original language description
This paper describes a metallographic preparation of the heat-exchanger austenitic stainless steels, i.e., Super304H, HR3C and Sanicro25. The as-received materials delivered after the solution annealing are very resistant to the chemical etchants. Therefore, it is more efficient to optimize the parameters of the electrolytic etching in the acidic or basic electrolytes. After the materials’ operation under elevated temperatures (600-750 °C), the microstructure is easier to etch due to the reduction of corrosion resistance. For the following analyses, it is necessary to think of the etching purpose in advance. For the grain size determination, it is sufficient to use electrolytic etching in the oxalic acid solution or chemical swabbing in the combination of 15 ml HCl, 10 ml acetic acid and 5 ml HNO3. For the image analysis of the intermetallics, the previous methods can be too invasive and give skewed results. In many cases, this leads to the overetching and thus removal of the observed particles (intermetallics, carbides, etc.). It is suitable to use selective etching methods or only polishing for a more precise evaluation, e.g., electron microscopy.
Czech name
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Czech description
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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)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Sborník z 15. konference Přínos metalografie pro řešení výrobních problémů
ISBN
978-80-01-06883-0
ISSN
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e-ISSN
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Number of pages
7
Pages from-to
107-113
Publisher name
České vysoké učení technické v Praze
Place of publication
Praha
Event location
Mariánské Lázně
Event date
Jun 21, 2021
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
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