Electrochemical injection of corrosion inhibitors and chloride extraction for protection of steel reinforcement

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F19%3A43919491" target="_blank" >RIV/60461373:22310/19:43919491 - 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

Electrochemical injection of corrosion inhibitors and chloride extraction for protection of steel reinforcement

Popis výsledku v původním jazyce

Electrochemical chloride extraction from a reinforced concrete structure may be accompanied with an electrochemical injection of healing agents if such agents are positively charged and are able migrate towards the activated reinforcement. Positive charge carrying nanoparticles or cationic corrosion inhibitors might be the proper choice. Organic substances with a positive charge and their salts are mostly such inhibitors. Critical concentration of chlorides was investigated for fresh and carbonated concrete pore solution. Corrosion inhibition efficiency was evaluated by means of polarization resistance as a measure of corrosion rate. Sodium nitrite was taken as a reference corrosion inhibitor. Migration tests were performed in order to test the migration ability of promising cation corrosion inhibitors, namely guanidine carbonate, tetrabutylammonium bromide, tetrabutylphosphonium bromide or triethylenetetraammine. Concentration profile of the inhibitors and chlorides was investigated in the testing concrete blocks. The best results have been obtained for guanidine carbonate and triethylenetetraammine. Both showed reasonable corrosion inhibition efficiency, the migration ability was performed only by guanidine

Název v anglickém jazyce

Electrochemical injection of corrosion inhibitors and chloride extraction for protection of steel reinforcement

Popis výsledku anglicky

Electrochemical chloride extraction from a reinforced concrete structure may be accompanied with an electrochemical injection of healing agents if such agents are positively charged and are able migrate towards the activated reinforcement. Positive charge carrying nanoparticles or cationic corrosion inhibitors might be the proper choice. Organic substances with a positive charge and their salts are mostly such inhibitors. Critical concentration of chlorides was investigated for fresh and carbonated concrete pore solution. Corrosion inhibition efficiency was evaluated by means of polarization resistance as a measure of corrosion rate. Sodium nitrite was taken as a reference corrosion inhibitor. Migration tests were performed in order to test the migration ability of promising cation corrosion inhibitors, namely guanidine carbonate, tetrabutylammonium bromide, tetrabutylphosphonium bromide or triethylenetetraammine. Concentration profile of the inhibitors and chlorides was investigated in the testing concrete blocks. The best results have been obtained for guanidine carbonate and triethylenetetraammine. Both showed reasonable corrosion inhibition efficiency, the migration ability was performed only by guanidine

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA16-11879S" target="_blank" >GA16-11879S: Obnova železobetonových konstrukcí pomocí simultánního odstranění chloridů a injektování nanočástic</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

NACE - International Corrosion Conference Series

ISBN

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ISSN

0361-4409

e-ISSN

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Počet stran výsledku

14

Strana od-do

14

Název nakladatele

National Assoc. of Corrosion Engineers International

Místo vydání

Nashville

Místo konání akce

Nashville

Datum konání akce

24. 3. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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