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Influence of pre-existing oxides layer and interface condition with carbonated concrete on active reinforcing steel corrosion

Castel, A. / Nasser, A.

This work focuses on carbonation-induced corrosion in concrete. This paper presents specific experiments which were developed in order to assess the influence of both pre-existing oxides layer at the surface of the steel bars and steel–concrete interface condition on active corrosion. Two types of active corrosion are studied: Microcell corrosion and galvanic corrosion. Results show that pre-existing oxide layer contributes to reduce both galvanic and microcell corrosion. Steel–concrete interface defect leads to a strong increase in galvanic corrosion but does not affect significantly microcell corrosion in carbonated concrete. The quantity of pre-existing oxides is highly scattered and these scatters can be superior to the mass of new oxides formed during relatively short-term corrosion tests in natural condition which makes mass loss analysis very difficult.

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Influence of pre-existing oxides layer and interface condition with carbonated concrete on active reinforcing steel corrosion

Castel, A. / Nasser, A.

This work focuses on carbonation-induced corrosion in concrete. This paper presents specific experiments which were developed in order to assess the influence of both pre-existing oxides layer at the surface of the steel bars and steel–concrete interface condition on active corrosion. Two types of active corrosion are studied: Microcell corrosion and galvanic corrosion. Results show that pre-existing oxide layer contributes to reduce both galvanic and microcell corrosion. Steel–concrete interface defect leads to a strong increase in galvanic corrosion but does not affect significantly microcell corrosion in carbonated concrete. The quantity of pre-existing oxides is highly scattered and these scatters can be superior to the mass of new oxides formed during relatively short-term corrosion tests in natural condition which makes mass loss analysis very difficult.

Influence of pre-existing oxides layer and interface condition with carbonated concrete on active reinforcing steel corrosion

Castel, A. / Nasser, A.

This work focuses on carbonation-induced corrosion in concrete. This paper presents specific experiments which were developed in order to assess the influence of both pre-existing oxides layer at the surface of the steel bars and steel–concrete interface condition on active corrosion. Two types of active corrosion are studied: Microcell corrosion and galvanic corrosion. Results show that pre-existing oxide layer contributes to reduce both galvanic and microcell corrosion. Steel–concrete interface defect leads to a strong increase in galvanic corrosion but does not affect significantly microcell corrosion in carbonated concrete. The quantity of pre-existing oxides is highly scattered and these scatters can be superior to the mass of new oxides formed during relatively short-term corrosion tests in natural condition which makes mass loss analysis very difficult.

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Title:

Influence of pre-existing oxides layer and interface condition with carbonated concrete on active reinforcing steel corrosion

Contributors:

Castel, A. (author) / Nasser, A. (author)

Published in:

Materials and Corrosion ; 66 ; 206-214

Publication date:

2015

Size:

9 Seiten

ISSN:

DOI:

https://doi.org/10.1002/maco.201307195

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Carbonation , elektrochemische Korrosion , bewehrter Beton , Oxid , Stahl , Schichtdicke , Betonkorrosion , Kurzzeitversuch , Massenverringerung , Grenzflächenzustand , verstärkter Stahl , Stahlblock

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