US 12,351,515 B2
Targeted corrosion inhibitor for marine reinforced concrete, and preparation and application thereof
Weihua Li, Guangzhou (CN); Mengzhu Chen, Guangzhou (CN); and Haibing Zheng, Guangzhou (CN)
Assigned to Henan academy of sciences, Zhengzhou (CN); and Institute of Chemistry, Henan Academy of Sciences, Zhengzhou (CN)
Filed by Sun Yat-sen University, Guangzhou (CN)
Filed on Apr. 11, 2022, as Appl. No. 17/717,255.
Prior Publication US 2022/0234953 A1, Jul. 28, 2022
Int. Cl. C04B 22/06 (2006.01); C04B 103/60 (2006.01); C04B 111/00 (2006.01); C04B 111/26 (2006.01)
CPC C04B 22/064 (2013.01) [C04B 2103/60 (2013.01); C04B 2111/00008 (2013.01); C04B 2111/26 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for preparing a targeted corrosion inhibitor, the targeted corrosion inhibitor being a nano silver-loaded nitrite-intercalated Ca—Al layered double hydroxide,
the method comprising:
(S1) dissolving sodium carbonate, calcium hydroxide, sodium metaaluminate, silver nitrate and sodium nitrite in boiling water, respectively, to obtain a first solution, a second solution, a third solution, a fourth solution and a fifth solution;
(S2) mixing the first solution, the second solution and the third solution followed by pH adjustment to obtain a reaction solution; and stirring the reaction solution;
(S3) subjecting the reaction solution to a hydrothermal reaction followed by vacuum filtration to obtain a first filter cake; and washing, drying and grinding the first filter cake to obtain a Ca-layered double hydroxide (Ca-LDH);
(S4) calcining the Ca-LDH obtained in step (S3) to obtain a Ca-layered double oxide (Ca-LDO);
(S5) dissolving the Ca-LDO in the fourth solution followed by pH adjustment, stirring and vacuum filtration to obtain a second filter cake; and washing and drying the second filter cake to obtain an Ag/Ca-layered double oxide (Ag/Ca-LDO); and
(S6) dissolving the Ag/Ca-LDO in the fifth solution followed by stirring at room temperature for 24-48 h, and vacuum filtration to obtain a third filter cake; and washing and drying the third filter cake to obtain the targeted corrosion inhibitor.