Abstract
It is important to study the corrosion resistance of reinforcing steel in various chloride salt environment. In this study, the corrosion performance of reinforcing steel inside mortar mixed with a new deoxyribonucleic acid (DNA) primer inhibitor in various chloride salt solutions (NaCl, KCl, CaCl2, MgCl2) was investigated. The results indicate that the chloride salt types have a significant effect on corrosion resistance of reinforcing steel in cement mortar mixed with DNA primer inhibitor, and the rule is NaCl ≈ KCl > CaCl2 >MgCl2. The new DNA primer inhibitor can maintain the good corrosion inhibition performance in cement mortar. NaCl and KCl can inhibit DNA primer inhibitor condensation and dissolution of calcium hydroxide, which can promote the formation of a better protective film compared with CaCl2 and MgCl2. MgCl2 and CaCl2 can lead to relatively high porosity and accelerate the diffusion of chloride ions to the steel surface than NaCl and KCl.
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