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6862282 
Journal Article 
Effect of rebar coating on corrosion resistance and bond strength of reinforced concrete 
Cheng, A; Huang, R; Wu, JK; Chen, CH; , 
2005 
Yes 
Construction and Building Materials
ISSN: 0950-0618
EISSN: 1879-0526 
ELSEVIER SCI LTD 
OXFORD 
404-412 
WOS:000227270700009 
The objective of this study is to assess the corrosion resistance of zinc-coated and coating effect on the bond strength between concrete and reinforcing steel. Potentiodynamic polarization method was utilized to determine the corrosion rates of carbon steel and zinc in both pH 12 solution and 3.5 wt% NaCl solution. In addition, cylindrical specimens were cast and exposed to 3.5% NaCl solution and a direct current density (0.5 mA/cm(2) ) was applied to accelerate the corrosion process. Open circuit potential (OCP), direct current polarization resistance were obtained to evaluate the rebar corrosion.Potentiodynamic polarization curves show that the corrosion rate of zinc is higher than carbon steel in pH 12 solution but lower in 3.5% NaCl solution. The bond strength of uncoated rebar is 5-10% less than zinc-coated rebar before aqueous immersion test. The bond strength decreases with an increase in corrosion rate for uncoated rebar and zinc-coated rebar. After 14-days accelerating corrosion process, the reduction ratio of bond strength for zinc-coated rebar is less than uncoated rebar. (C) 2004 Elsevier Ltd. All rights reserved.