A new multilayer coating for mild steel protection


Tuken T. , Yazici B. , Erbil M.

PROGRESS IN ORGANIC COATINGS, cilt.50, sa.2, ss.115-122, 2004 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 50 Konu: 2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1016/j.porgcoat.2004.01.002
  • Dergi Adı: PROGRESS IN ORGANIC COATINGS
  • Sayfa Sayıları: ss.115-122

Özet

A multilayer coating was prepared on mild steel by electrosynthesis of a thin polyphenol film on top of electrosynthesized polypyrrole layer. The cyclic voltammetry technique was used for the synthesis of both coatings and as far as we know a new procedure was applied for the synthesis of polypyrrole coating on mild steel electrode. The corrosion performance of this multilayer coating (PPy/pPhe) and single polypyrrole coating itself (PPy) were investigated in neutral sulphate solution by using electrochemical impedance spectroscopy (EIS), and anodic polarization curves. It was clearly shown that the multilayer coating could provide a much effective protection for much longer periods with respect to the single layer for corrosion of mild steel, an efficiency of 98.3% was determined for 240 h. The very thin polyphenol layer has improved the barrier effect of the coating remarkably. (C) 2004 Elsevier B.V. All rights reserved.