Abstract
High surface active amphiphilic nanogels based on N-isopropyl Acrylamide-co-2-acylamido-2-methylpropane sulfonic Acid (NIPAm/AMPS) prepared via free aqueous polymerization at room temperature have been prepared to apply as thin film anticorrosive coatings. The morphology and the particle size distribution of the nanogels were characterized transmission and scanning electron microscopy (TEM and SEM) and dynamic light scattering DLS in aqueous solution. The effectiveness of the synthesized compounds as corrosion inhibitors for carbon steel in 1 M HCl was investigated by various electrochemical techniques such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). Results obtained from both potentiodynamic polarisation and EIS measurements reveal that the NIPAm/AMPS nanogel is an effective inhibitor for the corrosion of steel in 1.0 M HCl solution. Polarization data show that NIPAm/AMPS nanogel behaves as a mixed type inhibitor. The inhibition efficiencies obtained from potentiodynamic polarization and EIS methods are in good agreement.The results showed enhancement in inhibition efficiencies with increasing the inhibitor concentrations.