Ultra-fast electropolymerization of pyrrole in aqueous media on oxidizable metals in a one-step process

Polypyrrole film on 55% Al–Zn-coated steel for corrosion prevention

“…For example, Zaid et al first treated a zinc surface with a NaS solution to make an inert ZnS-ZnO x H y surface layer and subsequently initiated the polymerisation of Py [26]. Petitjean et al electrochemically prepared a PPy layer on zinc in an aqueous sodium salicylate solution, where a zinc salicylate salt layer was formed to passivate the zinc surface before polymerisation occurred [24,25]. Martins et al prepared a PPy layer on zinc in an aqueous tartrate solution, where a zinc tartrate salt layer acted as a passivation layer on the zinc surface [28,29].…”

Corrosion protection of copper using polypyrrole electrosynthesised from a salicylate solution

“…The main advantage of using salicylate as a dopant is that electropolymerisation onto the copper substrate can be attained with relative ease. Passivation of the electrode and oxidation of the monomer can be achieved during the same cycle, as already observed by Lacaze and co-workers [27]. They used cyclic voltammetry, AFM, XPS and FT-IR to characterise these polymers [26,[28][29][30][31] but did not report on the corrosion protection ability of the films.…”

“…They used cyclic voltammetry, AFM, XPS and FT-IR to characterise these polymers [26,[28][29][30][31] but did not report on the corrosion protection ability of the films. Since the coating materials obtained from this new process showed promising results that could lead to industrial applications in the corrosion protection of oxidisable substrates [27], we further investigated the properties of these polymer coatings. In this paper results on the corrosion protective properties and long-term stability of salicylate-doped polypyrrole coatings electrodeposited on copper are presented and discussed.…”

The Electrochemical Synthesis and Corrosion Inhibitive Nature of Di N-Propyl Malonic Acid Doped Poly N –Methyl Aniline Coating On Stainless Steel

“…Laska et al [24] described precipitation polymerization of ANI by the conventional oxidant in presence of water-soluble organic acids instead of HCl. The conductive polymers have also been discussed in recent years as corrosion controlling materials [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44].…”

“…Most of the electrochemical polymerizations are carried out in non-aqueous media. The most suitable solvents currently in use include acetonitrile, benzonitrile, and tetrahydrofuran [45,[46][47][48][49][50][51][52][53]. Two corrosion protection mechanisms commonly associated with conducting polymer coatings are passivation and barrier effect.…”