Abstract
The green method to protect steel from corrosion becomes target for corrosion science. In this work, synthesis of new poly(ionic liquid) as green inhibitor with lower concentration is used to protect carbon steel from aci corrosion. In this respect, poly(ionic liquid) based on 2-acrylamido-2- methylpropane sulfonic acid, AMPS, was synthesized without solvent in the presence of diethyl ethanolamine (DEEA) as reagent and solvent. The chemical structure of PAMPS-DEA was confirmed by NMR analyses. The wettability of the prepared PAMPS-DEA was confirmed from contact angle measurements. The inhibition activity of poly(AMPS) and PAMPS-DEA for steel in acidic chloride solution was tested using electrochemical techniques. The synthesized Ionic liquids PAMPS-DEA shows an excellent corrosion inhibition performance for steel in 1 M HCl medium at concentration of 5 ppm. The adsorption of IL on steel surface blocked the active centers, which lowered the corrosion rate of steel.