Chemical cleaning of materials for power generating circuits

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F12%3A43894739" target="_blank" >RIV/60461373:22310/12:43894739 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Chemical cleaning of materials for power generating circuits

Popis výsledku v původním jazyce

Power generating circuits are chemically cleaned to prevent overheating and corrosion attack caused by surface deposits. Waterside and steamside layers are composed of metal oxides and other minor compounds from feed water. Therefore an optimal choice ofa cleaning agent and progress conditions are very important. We focused on a comparison of various chemical cleaning operations used for heat exchange tubes. The influence of the cleaning agent (hydrochloric acid, citric acid, and hydrofluoric acid), temperature, concentration of the agent, addition of inhibitor and position of the tube were investigated. Moreover, corrosion rates of base materials were determined. It has been showed that cleaning in hydrofluoric acid is more intensive than in citric acid, however, steels with lower chromium content may be damaged by localized corrosion. Generally, mass losses of low-chromium steels are higher than these of high-chromium steels. In the case of non-stirred solutions, deposits mass losse

Název v anglickém jazyce

Chemical cleaning of materials for power generating circuits

Popis výsledku anglicky

Power generating circuits are chemically cleaned to prevent overheating and corrosion attack caused by surface deposits. Waterside and steamside layers are composed of metal oxides and other minor compounds from feed water. Therefore an optimal choice ofa cleaning agent and progress conditions are very important. We focused on a comparison of various chemical cleaning operations used for heat exchange tubes. The influence of the cleaning agent (hydrochloric acid, citric acid, and hydrofluoric acid), temperature, concentration of the agent, addition of inhibitor and position of the tube were investigated. Moreover, corrosion rates of base materials were determined. It has been showed that cleaning in hydrofluoric acid is more intensive than in citric acid, however, steels with lower chromium content may be damaged by localized corrosion. Generally, mass losses of low-chromium steels are higher than these of high-chromium steels. In the case of non-stirred solutions, deposits mass losse

Druh

D - Stať ve sborníku

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

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Projekt

<a href="/cs/project/FR-TI1%2F086" target="_blank" >FR-TI1/086: Nové přístupy navrhování energetických zařízení a ocelových konstrukcí s vysokými užitnými parametry</a><br>

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of 19th International Students' Day of Metallurgy

ISBN

978-3-00-037493-7

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

259-264

Název nakladatele

Dzierzon Druck

Místo vydání

Freiberg

Místo konání akce

Freiberg

Datum konání akce

15. 3. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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