Galvanic Corrosion of Steel in Contact with Carbon-Polymer Composites. I: Experiments in Mortar
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Volume 6, Issue 2
Abstract
Galvanic corrosion is a possible form of deterioration when carbon fiber-reinforced polymer (CFRP) composites and steel are in direct contact in concrete, as in stirrups tied to prestressing CFRP tendons. Laboratory experiments were performed to determine the magnitude of galvanic currents that may take place as a consequence. Preliminary results show little galvanic corrosion of steel (between to 0.08 μA/cm2 of steel current density) when coupled with CFRP composites in mortar free of chlorides with a 0.5 water-to-cement ratio (w/c=0.5). However, significant galvanic action (steel current densities as high as 1.5 μA/cm2) was observed in chloride contaminated mortar. The study suggests that steel corrosion caused by deicing salts or marine exposure may be aggravated by the direct contact between steel and CFRP.
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Information
Published In
Journal of Composites for Construction
Volume 6 • Issue 2 • May 2002
Pages: 112 - 115
Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jan 16, 2001
Accepted: Jul 13, 2001
Published online: Apr 15, 2002
Published in print: May 2002
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