One-Step In Situ Electrochemical Synthesis of Polyaniline/CeO2 Composite Coating for Enhanced Corrosion Protection of Mild Steel
Source abstract
Abstract
The electrolytic composition significantly influences the structure and corrosion protection performance of polyaniline (PANI) coating. In the present work, oxalic acid and benzoic acid were employed to electropolymerize PANI coating on a mild steel substrate using the cyclic voltammetry (CV) technique. Then, cerium nitrate was introduced into the benzoic acid medium to electrochemically synthesize a PANI/CeO2 composite coating in situ. Scanning electron microscopy, X-ray photoelectron spectroscopy and electrochemical measurements were used to characterize the coating structure and corrosion resistance. The results suggested that the PANI coating prepared from benzoic acid electrolyte possessed a neater structure and better anti-corrosive properties. The co-deposition of CeO2 further increased the thickness and improved the compactness of the PANI coating. The synthesized PANI/CeO2 composite coating possessed the smallest corrosion current density and the largest inhibition efficiency of 98.2%. The charge transfer resistance and coating resistance also increased significantly after the implantation of CeO2 in the PANI coating. The enhanced corrosion protection performance of the PANI/CeO2 hybrid was also elucidated.
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Research context
OpenAlex topics: Conducting polymers and applications · Corrosion Behavior and Inhibition · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials and Energy, Foshan University, Foshan 528000, China
Department of Chemical Engineering and Safety, Shandong University of Aeronautics, Binzhou 256600, China
State Key Laboratory of Special Surface Protection Materials and Application Technology, China Academy of Machinery Wuhan Research Institute of Materials Protection Co., Ltd., Wuhan 430030, China
Funding
State Key Laboratory of Special Surface Protection Materials and Application Technology · National Natural Science Foundation of China · Innovation Team Project for Colleges and Universities of Guangdong Province
References (54)
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