Poly((pyridine-4-yl-methyl)methacrylate-co-butyl methacrylate) (Poly(PyMMA-co-BMA)) and its ZnO nanocomposites (Poly(PyMMA-co-BMA)/ZnO) were coated on the mild steel substrate (MS) to improve the corrosion resistance by blocking the destructive ultraviolet radiation (UV-radiation) and corrosive ions as well. The optical and anticorrosive properties of Poly(PyMMA-co-BMA) and Poly(PyMMA-co-BMA)/ZnO (1.0, 1.5, and 2.5 wt %) coatings were evaluated. The surface characterization techniques like UV visible spectroscopy and scanning electron microscope were taken to confirm the formation of Poly(PyMMA-co-BMA) and Poly(PyMMA-co-BMA)/ZnO (2.5 wt %) coating on MS. The optical studies revealed that the Poly(PyMMA-co-BMA)/ZnO (2.5 wt %) coating displays excellent UV blocking properties than other nanocomposite coatings (1.0 and 1.5 wt %). The potentiodynamic polarization and electrochemical impedance spectroscopy studies show that the Poly(PyMMA-co-BMA) and Poly(PyMMA-co-BMA)/ZnO (1.0, 1.5, and 2.5 wt %) coated MS in 3.5% (w/v) NaCl provides better protection against corrosion.

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© 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018135, 46175.