Abstract
Pigments produced using core shell methods are getting popular nowadays in corrosion resistance of reinforcement bars which are embedded inside the concrete. Present paper reports the comparison of corrosion resistance offered by pigments prepared using strontium and barium phosphate and coated over a reinforcement bar (rebar). Performance of nine rebars of diameter 12 mm coated using epoxy, strontium phosphate (SP) and barium phosphate (BP) in three different accelerated corrosion mediums such as 3.5 weight % NaCl solution, saturated calcium hydroxide Ca(OH)2 solution and 1 M hydrochloric acid (HCl) solution have been studied. Various tests such as elcometer analysis, open circuit potential measurement, half-cell potential measurement and EIS were conducted and the results were recorded. The results of these tests showed that the strontium phosphate shows a better corrosion resistance compared with barium and epoxy coating.
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