Sonoelectrochemical Synthesis of PPy-MWCNTs-Chitosan Nanocomposite Coatings: Characterization and Corrosion Behavior
Source abstract
Abstract
This study investigated the effect of co-incorporation of a kind of nanomaterials and organic additives in a polymer matrix coating on corrosion performance of St-12 steel. We synthesized sonoelectrochemically the polypyrrole (PPy), polypyrrole/chitosan (PPy-chitosan), polypyrrole/multiwalled carbon nanotubes (PPy/MWCNTs), and polypyrrole/MWCNTs/chitosan (PPy-MWCNTs-chitosan) films on the base alloy. In-situ polymerization carried out in a solution containing 0.1 mol/L oxalic acid, 100 mg/L dodecylbenzen sulfonic acid, and 0.1 mol/L pyrrole in the absence and presence of a certain amount of MWCNTs and chitosan. The corrosion protection behavior of the synthesized coatings in 3.5% NaCl aqueous solution was studied by the evolution of the open circuit potential, potentiodynamic polarization, and electrochemical impedance spectroscopy techniques. The results revealed that PPy-MWCNTs-chitosan nanocomposite coating exhibits significantly better corrosion protection than others. The PPy-MWCNTs-chitosan film acts as a physical barrier against the corrosive species, because it has a very dense and more compact structure. The surface morphology was investigated by scanning electron microscopy.
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Research context
OpenAlex topics: Conducting polymers and applications · Advanced Sensor and Energy Harvesting Materials · Polymer Nanocomposite Synthesis and Irradiation
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References (41)
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