The Adsorbing Effect of Calcined Layered Double Hydroxide for Chloride Ions in Simulated Concrete Pore Solutions
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第2期
论文作者：唐聿明 ZHAO Xuhui NIU Le 左禹
文章页码：278 - 283
摘 要：The adsorbing effect of calcined layered double hydroxide（CLDH） for chloride ions in simulated concrete pore（SCP） solutions was investigated with the potentiodynamic polarization method, impedance measurement, ion selective electrode analysis and XRD. CLDH could effectively adsorb Cl- and increase pH value in SCP solutions containing NaCl. The chloride to hydroxyl ions ratio（[Cl-]/[OH-]） of the solution greatly decreased by CLDH treatment. In CLDH treated SCP solution with Cl-, the pitting potential of carbon steel notably increased, and the surface impedance was much higher, indicating strengthened passivation. The process of CLDH adsorbing chloride ions from SCP solutions was accompanied with the reconstruction of the layered structure.
唐聿明，ZHAO Xuhui，NIU Le，左禹
School of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing Key Laboratory of Electrochemical Process and Technology for Materials
摘 要：The adsorbing effect of calcined layered double hydroxide（CLDH） for chloride ions in simulated concrete pore（SCP） solutions was investigated with the potentiodynamic polarization method, impedance measurement, ion selective electrode analysis and XRD. CLDH could effectively adsorb Cl- and increase pH value in SCP solutions containing NaCl. The chloride to hydroxyl ions ratio（[Cl-]/[OH-]） of the solution greatly decreased by CLDH treatment. In CLDH treated SCP solution with Cl-, the pitting potential of carbon steel notably increased, and the surface impedance was much higher, indicating strengthened passivation. The process of CLDH adsorbing chloride ions from SCP solutions was accompanied with the reconstruction of the layered structure.
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