Electrochemical properties of oxide scale on steel exposed in saturated calcium hydroxide solutions with or without chlorides
Journal article, 2018

The electrochemical properties of various iron oxide scales on steel exposed in saturated calcium hydroxide solutions were investigated. The iron oxide scales were manufactured by different heat treatments and grinding processes and characterized using X-ray diffraction and scanning electron microscope. The electrochemical properties of the scales were assessed by measuring the corrosion potential and using electrochemical impedance spectroscopy and potentiodynamic polarization curves. It was found that wustite and magnetite are less noble compared to hematite but are more effective as cathodic surfaces. The results show that the electrochemical properties of the mill scale can be an important contributing factor in the corrosion of steel in concrete.

Author

Johan Ahlström

Swerea KIMAB

Johan Tidblad

Swerea KIMAB

Luping Tang

Chalmers, Architecture and Civil Engineering, Building Technology

Bror Sederholm

Swerea KIMAB

Simon Leijonmarck

Swerea KIMAB

International Journal of Corrosion

1687-9325 (ISSN) 1687-9333 (eISSN)

Vol. 2018 5623504

Subject Categories

Manufacturing, Surface and Joining Technology

Materials Chemistry

Corrosion Engineering

DOI

10.1155/2018/5623504

More information

Latest update

12/10/2018