AUTHOR=Zhang Anjie , Mu Bin , Wang Xiaowen , Wang Aiqin 

TITLE=CoAl2O4/Kaoline Hybrid Pigment Prepared via Solid-Phase Method for Anticorrosion Application

JOURNAL=Frontiers in Chemistry

VOLUME=6

YEAR=2018

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00586

DOI=10.3389/fchem.2018.00586

ISSN=2296-2646

ABSTRACT=<p>In this study, kaoline is incorporated to prepare CoAl<sub>2</sub>O<sub>4</sub>/kaoline hybrid pigments <italic>via</italic> traditional solid-state reaction, and the introduction of kaoline decreases the preparation temperature for formation of spinel CoAl<sub>2</sub>O<sub>4</sub>, and reduces the production cost of cobalt blue as well. More importantly, kaoline may participate in the crystallization of spinel CoAl<sub>2</sub>O<sub>4</sub> during calcining process, and the hybrid pigments prepared using 8.1% Co<sub>3</sub>O<sub>4</sub> and 81.5% kaoline features bright blue and good chemical resistance. Due to the synergistic effect between the sheet-like kaoline and the loaded CoAl<sub>2</sub>O<sub>4</sub>, the as-prepared CoAl<sub>2</sub>O<sub>4</sub>/kaoline hybrid pigments can be incorporated into epoxy paint system to obtain the high-performance blue anticorrosion coating, especially for acetic acid-salt fog corrosion.</p>