Corrosion Mechanism and Bond-Strength Study on Galvanized Steel in Concrete Environment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43914191" target="_blank" >RIV/60461373:22310/17:43914191 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.14773/cst.2017.16.2.69" target="_blank" >http://dx.doi.org/10.14773/cst.2017.16.2.69</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14773/cst.2017.16.2.69" target="_blank" >10.14773/cst.2017.16.2.69</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Corrosion Mechanism and Bond-Strength Study on Galvanized Steel in Concrete Environment

Popis výsledku v původním jazyce

Zinc coating on carbon steels give the higher corrosion resistance in chloride containing environments and in carbonated concrete. However, hydrogen evolution accompanies the corrosion of zinc in the initial activity in fresh concrete, which can lead to the formation of a porous structure at the reinforcement -concrete interface, which can potentially reduce the bond-strength of the reinforcement with concrete. The present study examines the mechanism of the corrosion of hot-dip galvanized steel in detail, as in the model pore solutions and real concrete. Calcium ion plays an important role in the corrosion mechanism, as it prevents the formation of passive layers on zinc at an elevated alkalinity. The corrosion rate of galvanized steel decreases in accordance with the exposure time; however, the reason for this is not the zinc transition into passivity, but the consumption of the less corrosion-resistant phases of hot-dip galvanizing in the concrete environment. The results on the electrochemical tests have been confirmed by the bond-strength test for the reinforcement of concrete and by evaluating the porosity of the cement adjacent to the reinforcement.

Název v anglickém jazyce

Corrosion Mechanism and Bond-Strength Study on Galvanized Steel in Concrete Environment

Popis výsledku anglicky

Zinc coating on carbon steels give the higher corrosion resistance in chloride containing environments and in carbonated concrete. However, hydrogen evolution accompanies the corrosion of zinc in the initial activity in fresh concrete, which can lead to the formation of a porous structure at the reinforcement -concrete interface, which can potentially reduce the bond-strength of the reinforcement with concrete. The present study examines the mechanism of the corrosion of hot-dip galvanized steel in detail, as in the model pore solutions and real concrete. Calcium ion plays an important role in the corrosion mechanism, as it prevents the formation of passive layers on zinc at an elevated alkalinity. The corrosion rate of galvanized steel decreases in accordance with the exposure time; however, the reason for this is not the zinc transition into passivity, but the consumption of the less corrosion-resistant phases of hot-dip galvanizing in the concrete environment. The results on the electrochemical tests have been confirmed by the bond-strength test for the reinforcement of concrete and by evaluating the porosity of the cement adjacent to the reinforcement.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA14-20856S" target="_blank" >GA14-20856S: Kinetika korozních dějů a transportu korozních médií v ultra-vysokopevnostních betonech (UHPC)</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Corrosion Science and Technology

ISSN

1598-6462

e-ISSN

—

Svazek periodika

16

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

KR - Korejská republika

Počet stran výsledku

7

Strana od-do

"69 "-75

Kód UT WoS článku

000410978200004

EID výsledku v databázi Scopus

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