TY - JOUR
T1 - Highly hydrophobic polyaniline nanoparticles for anti-corrosion epoxy coatings
AU - Chen, Huaiyin
AU - Fan, Huizhou
AU - Su, Nan
AU - Hong, Ruoyu
AU - Lu, Xuesong
N1 - Funding Information:
This work was supported by Fuzhou University Testing Fund of precious apparatus (Nos. 2021T023 , 2020T025 ), Minjiang Scholarship of Fujian Province (No. Min-Gaojiao [2010]-117), Central Government Guiding Special funds for Local Science and Technology Development (No. 830170778 ), R&D Fund for Strategic Emerging Industry of Fujian Province (No. 82918001 ), and International Cooperation Project of Fujian Science and Technology Department (No. 830170771 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/15
Y1 - 2021/9/15
N2 - Perfluorooctanoic acid doped polyaniline (PFOA/PANI) nanoparticles were successfully prepared through ultrasonication-assisted oxidation polymerization. The prepared PFOA/PANI nanoparticles exhibited high hydrophobicity and good dispersibility in ethanol, which could uniformly distribute in epoxy resin (EP) coatings to enhance their anti-penetrant efficiency towards corrosive media. The corrosion protection properties of PANI-contained coatings on Q215 steel were evaluated and compared through electrochemical impedance spectroscopy measurements in brine. The experimental results demonstrated the PFOA/PANI/EP coatings possessed higher corrosion performance than the EP coatings and HCl-doped PANI-contained EP coatings. Besides, dedoped PFOA molecules from PFOA/PANI nanoparticles can be adsorbed on the surface of steel to form a hydrophobic corrosion inhibition layer, which further improves the corrosion resistance. The impedance of PFOA/PANI/EP coatings continuously increased after the coatings were immersed in brine for more than 2 days, and the impedance modulus at 0.01 Hz was higher than 6 × 108 Ω·cm2 after 9 days. The novel method for the preparation of hydrophobic PANI nanoparticles proposed in this work may provide new ideas and methods for developing more high-performance anti-corrosion materials and promoting their applications in corrosion protection.
AB - Perfluorooctanoic acid doped polyaniline (PFOA/PANI) nanoparticles were successfully prepared through ultrasonication-assisted oxidation polymerization. The prepared PFOA/PANI nanoparticles exhibited high hydrophobicity and good dispersibility in ethanol, which could uniformly distribute in epoxy resin (EP) coatings to enhance their anti-penetrant efficiency towards corrosive media. The corrosion protection properties of PANI-contained coatings on Q215 steel were evaluated and compared through electrochemical impedance spectroscopy measurements in brine. The experimental results demonstrated the PFOA/PANI/EP coatings possessed higher corrosion performance than the EP coatings and HCl-doped PANI-contained EP coatings. Besides, dedoped PFOA molecules from PFOA/PANI nanoparticles can be adsorbed on the surface of steel to form a hydrophobic corrosion inhibition layer, which further improves the corrosion resistance. The impedance of PFOA/PANI/EP coatings continuously increased after the coatings were immersed in brine for more than 2 days, and the impedance modulus at 0.01 Hz was higher than 6 × 108 Ω·cm2 after 9 days. The novel method for the preparation of hydrophobic PANI nanoparticles proposed in this work may provide new ideas and methods for developing more high-performance anti-corrosion materials and promoting their applications in corrosion protection.
KW - Anti-corrosion coatings
KW - Corrosion inhibition
KW - Hydrophobicity
KW - Polyaniline
UR - http://www.scopus.com/inward/record.url?scp=85107159152&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2021.130540
DO - 10.1016/j.cej.2021.130540
M3 - Article
AN - SCOPUS:85107159152
SN - 1385-8947
VL - 420
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 130540
ER -