Polarization induced deterioration of reinforced concrete with CFRP anode
Journal article, 2015

This paper investigates the deterioration of reinforced concrete with carbon fiber reinforced polymer (CFRP) anode after polarization. The steel in the concrete was first subjected to accelerated corrosion to various extents. Then, a polarization test was performed with the external attached CFRP as the anode and the steel reinforcement as the cathode. Carbon fiber reinforced mortar and conductive carbon paste as contact materials were used to adhere the CFRP anode to the concrete. Two current densities of 1244 and 2488 mA/m2, corresponding to the steel reinforcements were applied for 25 days. Electrochemical parameters were monitored during the test period. The deterioration mechanism that occurred at the CFRP/contact material interface was investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The increase of feeding voltage and the failure of bonding was observed during polarization process, which might have resulted from the deterioration of the interface between the contact material and CFRP. The formation and accumulation of NaCl crystals at the contact material/CFRP interface were inferred to be the main causes of the failure at the interface. © 2015 by the authors.

Polarization

Interface deterioration

CFRP anode

Reinforced concrete

Author

J. H. Zhu

Shenzhen University

L. Wei

Shenzhen University

M. Zhu

Shenzhen University

H. Sun

Shenzhen University

Luping Tang

Chalmers, Civil and Environmental Engineering, Building Technology

F. Xing

Shenzhen University

Materials

1996-1944 (ISSN)

Vol. 8 7 4316-4331

Subject Categories

Building Technologies

Composite Science and Engineering

DOI

10.3390/ma8074316

More information

Created

10/7/2017