Abstract
The purpose of this study is to investigate the effects of types of rust-inhibitors on corrosion prevention of reinforcement in aqueous solutions and mortar specimens containing chloride ion. The three types of rust-inhibitors are used. The reinforcements are dipped in aqueous solutions for 28 days and tested for qualitative and morphologic analysis of corrosion products. And the reinforcements in mortars specimens are measured rate of corrosion area after the accelerated corrosion test. The following results are obtained. The corrosion degrees of reinforcements are influenced by the types of rust-inhibitors. The reinforcements are corroded in aqueous solutions without lithium nitrite, as the corrosion products α-FeOOH, β-FeOOH, γ-FeOOH and Fe3O4 are determined by X-ray diffraction and Fourier transform-infrared analysis. As the results of corrosion test in mortar specimens, rate of corrosion area is very small with lithium nitrite, but more or less macro cell corrosion is caused at the boundary between basis part and repair part in all specimens.
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