Details

Autor(en) / Beteiligte

• Pezeshk-Fallah, Houra
• Yari, Hossein
• Mahdavian, Mohammad
• Ramezanzadeh, Bahram
• Haddadi, Seyyed Arash
• Mekonnen, Tizazu H.

Titel

Yolk–shell structured carbon hollow spheres (CHS)/metal-organic framework nanoparticles-holding epoxy composite inheriting smart anti-corrosion feature

Ist Teil von

• Applied materials today, 2024-04, Vol.37, p.102091, Article 102091

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2024

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •CHS nanospheres were synthesized with the hard template method (SiO2) followed by ZIF-8 nanoparticles growth inside and outside of the CHS structures.•ZCHS-II exhibited better control of Zn ions release compared to ZIF-8 and ZCHS-I nanoparticles.•ZCHS-II demonstrated superior barrier anti-corrosion properties (log Z|f = 0.01 > 10 Ω.cm2) during seven weeks of immersion.•ZCHS-II indicated the best adhesion strength (2.92 MPa) among other coatings in wet conditions. This study represents the synthesis of carbon hollow spheres (CHSs) to encapsulate Zeolite Imidazole Frameworks (ZIF-8) inside and outside the CHS (ZCHS-II), and once inside the CHSs’ structure (ZCHS-I) to control ZIF-8′s release properties and its influence on mild steel substrate's anti-corrosion characteristics. Nanoparticles were characterized by FE-SEM/EDX-mapping, XRD, FT-IR, HR-TEM, Raman (50–3500 cm−1), and XPS. ZIF-8 nanoparticles were successfully decorated both inside and outside the CHSs' structure according to BET and HR-TEM results. Additionally, ZCHS-II exhibited better control of Zn ions release compared to ZIF-8 and ZCHS-I nanoparticles. It was found that the ZCHS-II nanocomposite considerably enhanced the steel substrate's corrosion resistance. After 72 h of contact in NaCl media, |Z|f=0.01 for the scratched ZCHS-II/EP (79,432 Ω.cm2) was higher than other nanocomposites and the EP coating. Moreover, ZCHS-II demonstrated excellent barrier properties during 50 days of immersion in NaCl media (log |Z|f=0.01 > 10 Ω.cm2) and superior pull-off strength in wet conditions (2.92 MPa). [Display omitted]