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Free keywords:
Corrosion inhibitors; Electrodeposition; Electrolytes; Negative ions; Semiconductor doping; Spectroscopy; Thin films, 3-nitro salicylate anions; Release system; Scanning Kelvin probe (SKP), Polypyrroles
Abstract:
Scanning Kelvin probe and electrochemical impedance spectroscopy were used to study the release behaviour of inhibitor anions doped in polypyrrole film (e.g. molybdate, 3-nitro salicylate). The polypyrrole coatings were formed on mild steel and zinc substrates in aqueous solution. It was shown that the release behaviour of the molybdate and 3-nitro salicylate anions depends on the size of cations in the electrolyte. The delamination is determined with the migration and incorporation of small cations.