Corrosion Resistance and Mechanism of Steel Rebar Coated with Three Types of Enamel

Abstract

Corrosion resistances of steel rebar with different enamel coatings, and with fusion bonded epoxy coatings were investigated in 3.5wt.% NaCl solution by Electrochemical Impedance Spectroscopy (EIS). The sensitivity to damage of the coatings was characterized and it was found that the pure and double enamel coatings can protect the steel rebar better than the mixed enamel coating due to their denser microstructures with isolated pores. Damaged enamel coating was locally corroded, whereas corrosion at a defect often undercut the epoxy coating. The intact epoxy coating offered better corrosion protection than the enamel coatings.

Department(s)

Civil, Architectural and Environmental Engineering

Second Department

Materials Science and Engineering

Keywords and Phrases

A. Steel; A. Ceramic; B. EIS; B. SEM; B. XRD

International Standard Serial Number (ISSN)

0010-938X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2012 Elsevier, All rights reserved.

Publication Date

01 Jun 2012

Link to Full Text

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