Abstract
A method of producing extremely adhesive polypyrrole film on Titanium (Ti) substrate was investigated. The Ti substrate was chemically pretreated and then modified by polydopamine (PDA), the polypyrrole film synthesized by electrochemical method on the treated Ti substrate displayed good adhesion and enhanced anticorrosion performance. The study of the corrosion process was conducted through open circuit potential, tafel polarization and alternating current impedance test. The adhesive polypyrrole film coated titanium showed higher positive shift in corrosion potential and lower corrosion rate, indicating the great enhanced anti-corrosion performance.
Highlights
Polypyrrole (PPy), one of the typical conducting polymers (CPs), has been widely investigated in metal anti-corrosion applications due to its good air and water stability, high conductivity and ease of synthesis at room temperature[1, 2]
We investigate an effective method to produce adherent PPy film on Ti substrate
MATEC Web of Conferences untreated Ti substrate, PDA modified Ti substrate, and pretreated plus PDA modified Ti substrate, the obtained samples were denoted as Ti/PPy, Ti/PDA–PPy and SC2Ti/PDA–PPy, respectively
Summary
Polypyrrole (PPy), one of the typical conducting polymers (CPs), has been widely investigated in metal anti-corrosion applications due to its good air and water stability, high conductivity and ease of synthesis at room temperature[1, 2]. The poor adhesion force between the PPy film and substrate material seriously inhibit its further application[3]. The good adhesion property and the ability to be secondary modified by other molecules make it a suitable material for improving the adhesion force between films and substrate by being used as an interlayer[8]. We investigate an effective method to produce adherent PPy film on Ti substrate. The obtained PPy film showed good adhesion force and enhanced anti-corrosion performance
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