BTA loaded in various CeO2 nanocontainers in epoxy coating for long-term anticorrosion of low carbon steel

To figure out the behavior of benzotriazole (BTA) loaded in CeO 2 nanocontainers during long term anticorrosion, three kinds of CeO 2 spheres were used: hollow spheres ( HS s), double-shell hollow spheres ( DHS s), and solid-mesoporous spheres ( SS s). The BTA loading and releasing situations were checked, and CeO 2 - HS s exhibited the largest BTA loading amount of 12.5 wt%, forming by both chemical and physical adsorption. The highest BTA loading in CeO 2 - HS s may be attributed to its hollow structure and more Ce 3+ sites (39 %) for BTA anchoring. Thus, CeO 2 - HS s@BTA exhibited an excellent long-term anticorrosion in epoxy coating for low carbon steel protection, showing no rusting after 40 days of salt spray experiment.