Electrodeposition of homogeneous and adherent polypyrrole on copper for corrosion protection

Polypyrrole Composites: Electrochemical Synthesis, Characterizations and Applications

“…The efficiency of corrosion protection of PPy depends on the nature of the doping agents (Balaskas et al, 2011). Electrochemically deposited PPy films on Cu displayed good protection against Cu corrosion in a 3.5% NaCl solution (Herrasti et al, 2007). The effectiveness of the protection is enhanced when the PPy film is electrosynthesized from a solution of dihydrogen phosphate (Redondo & Breslin, 2007) or sodium saccharinate (Bazzaoui et al, 2007).…”

Corrosion protection of copper using polypyrrole electrosynthesised from a salicylate solution

“…The electrosynthesis of the polymer was performed by cyclic voltammetry at a relatively low scan rate, 10 mV/s, since it has been demonstrated that this process yields more adherent and homogeneous deposits [23]. The potential window and the concentration of salicylate were chosen to avoid oxidation of the salicylate.…”

“…One of the approaches studied to overcome these limitations is to use anions that will complex with the dissolving copper and passivate the electrode, facilitating the electropolymerisation of the monomer. For example, Herrasti et al [23] and Tuken et al [13], have electrodeposited adherent polymers on copper from oxalate solutions, after passivating the electrode in the same monomer containing electrolyte solution.…”

Electrodeposition of Conducting Polymers on Copper in Nonaqueous Media by Corrosion Inhibition

“…[6][7][8][9] While the electropolymerization of CPs has been carried out mostly on noble metal electrodes (Pt, Au, glassy carbon), only a little progress has been achieved in the deposition on less noble substrates such as steel, Al, and Cu. [10][11][12][13][14][15][16] This is because the anodic electrodeposition on the active metal is hampered by the metal oxidation that competes with the oxidation of the polymer monomer. Meanwhile, some appropriate anions (oxalate, tartrate, salicylate) have been revealed to allow deposition of polypyrrole (PPy) films on steel and Cu electrodes.…”

“…[10][11][12][13][14][15][16] The protective layer that the anions form on the electrode surface was claimed to prevent massive dissolution of metal substrates. [14][15][16] Employing a redox mediator such as Trion (4,5-dihydroxy-1,3-benzenedisulfonic acid) has been reported to lower the deposition potential and offer an effective way to prepare PPy film on Al and Al alloy. 17,18) All the previous strategies, however, are based on aqueous media and are not applicable to poly(3,4-ethylenedioxythiophene) (PEDOT) and polythiophene (PTh).…”