Preparation of MgAl layered double hydroxides intercalated with nitrite ions and corrosion protection of steel bars in simulated carbonated concrete pore solution

By J. Zuo, Bo Wu, Chaoyun Luo, Biqin Dong, Feng Xing. Corrosion Science, 2019

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Abstract Mg-Al layered double hydroxides intercalated with nitrite ions was prepared by three different methods: calcined-rehydration (R-LDH), hydrothermal (H-LDH) and coprecipitation (C-LDH) method. The products were characterized and the results indicated that C-LDH had the highest intercalated rate of anions. The ion substitution test also verified C-LDH exhibited the largest adsorption capacity of chloridion. The inhibition efficiency and corrosion current density of C-LDH from electrochemical test both had the better performance than R-LDH and H-LDH over immersion time. Therefore, C-LDH could had the best anticorrosion in a long period and its mechanism of corrosion protection was also discussed.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/bed510bd4a65d609298fc42903f20285bcb1cde7