SYNTHESIS AND CHARACTERIZATION OF POLY (SODIUM 2-ACRYLAMIDO-2-METHYL PROPANE SULFONATE)/CLAY NANOCOMPOSIT ON STEEL IN AGGRESSIVE MEDIUM

Waterborne bioactive materials PNa- AMPS /MMT has been successfully prepared by effectively dispersing inorganic nanolayers of Na+-MMT clay in crosslinked PNa-AMPS matrix through direct aqueous solution dispersion technique. The prepared nanogel was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD) patterns and transmission electron microscopy (TEM). The corrosion inhibition activity of PNa-AMPS /MMT towards steel corrosion in chloride containing environment has been investigated by polarization and electrochemical impedance spectroscopy (EIS) methods. Polarization measurements indicate that PNa-AMPS /MMT acts as a mixed type-inhibitor and the inhibition efficiency increases with inhibitor concentration. The results of potentiodynamic polarization and EIS measurements clearly showed that the inhibition mechanism involves blocking of the steel surface by inhibitor molecules via adsorption.