Ince, AhmetKoramaz, IlaydaKaya, ErtugrulKaragoz, Bunyamin2024-08-232024-08-2320240169-42431568-5616https://doi.org/10.1080/01694243.2023.2240593https://hdl.handle.net/20.500.12684/14221A novel POEGMA-b-(PMEEU-co-PMAA) (poly(oligo(ethylene glycol) methacrylate)-b-poly((methacrylamidoethyl) ethylene urea)-co-poly(methacrylic acid) block copolymer has been synthesized by RAFT polymerization as a corrosion inhibitor. Structural characterization of the block copolymer was done by FTIR, C-13 NMR and H-1 NMR spectroscopic techniques. The carboxylic acid and cyclic urea units on the block copolymer exert a synergistic effect on corrosion inhibition through chelating of the metal ions or adsorption to the metal surface. Corrosion inhibition of SAE 1012 carbon steel in a 1 M HCl medium has been investigated in the presence of 5 mM polymer using both experimental (electrochemical impedance spectroscopy, Tafel polarization (TP), weight loss) and theoretical approaches. Also, SAE 1012 carbon steel surface morphology changes were followed by energy dispersive X-ray spectroscopy and scanning electron microscopy. Electrochemical techniques indicated that the presence of PMEEU-co-PMAA segments of the polymer in the acid solution inhibits corrosion of SAE 1012 carbon steel. The inhibition efficiency of the polymer was found to be about 85%. According to TP studies, PMEEU-co-PMAA segment acts as a mixed type corrosion inhibitor. The adsorption of PMEEU-co-PMAA molecules onto the metal surface follows Langmuir adsorption isotherm. The K-ads value calculated from the equilibrium constant of the adsorption process reflects a strong interaction. SEM and EDAX studies provide evidence of PMEEU-co-PMAA adsorption on the metal surface.en10.1080/01694243.2023.2240593info:eu-repo/semantics/closedAccessAcid corrosionmulti-functional block copolymercarbon steelcorrosion inhibitorRAFT polymerization>St37 Steel CorrosionEco-Friendly InhibitorMild-SteelNanoparticles CompositeCarbon-SteelChitosanPerformanceDerivativesAdsorptionIndustryArticle3845976172-s2.0-85167458293WOS:001044242800001Q2Q2