TY - JOUR
T1 - Inhibition of the corrosion of stainless steel by poly-N-vinylimidazole and N-vinylimidazole
AU - Öncül, Ayşegül
AU - Çoban, Kerim
AU - Sezer, Esma
AU - Şenkal, Bahire Filiz
PY - 2011/6
Y1 - 2011/6
N2 - In this study, we investigated the inhibition of the corrosion of stainless steel (SS) in acidic solution by N-vinylimidazole monomer (NVI) and poly-N-vinylimidazole (PNVI). First, we have synthesized a polymer sample of PNVI from the monomer NVI. A stainless steel electrode was coated with this polymer as a thin film by dipping method. Corrosion rates of SS electrodes coated with PNVI films of different thicknesses were determined and compared with the results of the bare electrode in acidic solution. Corrosion rates of the bare SS electrodes were also compared with the rates in the presence of monomer and polymer, respectively, in the acidic solution. The corrosion currents were obtained by Tafel extrapolation from anodic and cathodic polarization curves. Electrochemical impedance spectroscopy (EIS) measurements were also carried out. Values of percent inhibition, wetted area and porosity were obtained for SS electrodes coated with PNVI films of different thicknesses. Experimental results show that polymer of PNVI inhibits corrosion of SS both by coating as a polymer film on electrode surface and as an inhibitor added to acidic solutions. Moreover, monomer of NVI inhibits corrosion of SS as an inhibitor added to acidic solutions and its performance seems to be better than that of PVNI.
AB - In this study, we investigated the inhibition of the corrosion of stainless steel (SS) in acidic solution by N-vinylimidazole monomer (NVI) and poly-N-vinylimidazole (PNVI). First, we have synthesized a polymer sample of PNVI from the monomer NVI. A stainless steel electrode was coated with this polymer as a thin film by dipping method. Corrosion rates of SS electrodes coated with PNVI films of different thicknesses were determined and compared with the results of the bare electrode in acidic solution. Corrosion rates of the bare SS electrodes were also compared with the rates in the presence of monomer and polymer, respectively, in the acidic solution. The corrosion currents were obtained by Tafel extrapolation from anodic and cathodic polarization curves. Electrochemical impedance spectroscopy (EIS) measurements were also carried out. Values of percent inhibition, wetted area and porosity were obtained for SS electrodes coated with PNVI films of different thicknesses. Experimental results show that polymer of PNVI inhibits corrosion of SS both by coating as a polymer film on electrode surface and as an inhibitor added to acidic solutions. Moreover, monomer of NVI inhibits corrosion of SS as an inhibitor added to acidic solutions and its performance seems to be better than that of PVNI.
KW - Inhibition of corrosion
KW - N-vinylimidazole
KW - Poly-N-vinylimidazole
KW - Stainless steel
UR - http://www.scopus.com/inward/record.url?scp=79955122559&partnerID=8YFLogxK
U2 - 10.1016/j.porgcoat.2011.02.001
DO - 10.1016/j.porgcoat.2011.02.001
M3 - Article
AN - SCOPUS:79955122559
SN - 0300-9440
VL - 71
SP - 167
EP - 172
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
IS - 2
ER -