Corrosion Response of Steel to Penetration of Chlorides in DC-Treated Hardened Portland Cement Mortar

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00384786" target="_blank" >RIV/68407700:21110/25:00384786 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22310/25:43933582 RIV/60461373:22810/25:43933582

Result on the web

<a href="https://doi.org/10.3390/ma18143365" target="_blank" >https://doi.org/10.3390/ma18143365</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/ma18143365" target="_blank" >10.3390/ma18143365</a>

Result language

angličtina

Original language name

Corrosion Response of Steel to Penetration of Chlorides in DC-Treated Hardened Portland Cement Mortar

Original language description

Electrochemical treatment by means of direct current (DC) is usually used as a measure for steel rebar corrosion protection, e.g., cathodic protection (CP), electrochemical chloride extraction (ECE), and re-alkalization (RA). However, the passage of an electrical charge through the pore system of concrete or mortar, coupled with the migration of ions, concentration changes, and resulting phase changes, may alter its chloride penetration resistance and, subsequently, the time until rebar corrosion activation. Porosity changes in hardened Portland cement mortar were studied by means of mercury intrusion porosimetry (MIP) and electrochemical impedance spectroscopy (EIS), and alterations in the mortar surface phase composition were observed by means of X-ray diffraction (XRD). In order to innovatively investigate the impact of DC treatment on the properties of the mortar–electrolyte interface, the cathode-facing mortar surface and the anode-facing mortar surface were analyzed separately. The corrosion of steel coupons embedded in DC-treated hardened mortar was monitored by means of the free corrosion potential (Eoc) and polarization resistance (Rp). The results showed that the DC treatment affected the surface porosity of the hardened Portland cement mortar at the nanoscale. Up to two-thirds of the small pores (0.001–0.01 µm) were replaced by medium-sized pores (0.01–0.06 µm), which may be significant for chloride ingress. Although the porosity and phase composition alterations were confirmed using other techniques (EIS and XRD), corrosion tests revealed that they did not significantly affect the time until the corrosion activation of the steel coupons in the mortar.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20101 - Civil engineering

Project

<a href="/en/project/GA21-11965S" target="_blank" >GA21-11965S: Microstructural investigation and simulation of coupled physical fields in concrete due to electromigration treatments</a><br>

Continuities

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

Publication year

2025

Confidentiality

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

Name of the periodical

Materials

ISSN

1996-1944

e-ISSN

1996-1944

Volume of the periodical

18

Issue of the periodical within the volume

14

Country of publishing house

CH - SWITZERLAND

Number of pages

20

Pages from-to

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UT code for WoS article

001535620300001

EID of the result in the Scopus database

2-s2.0-105011615989