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    Corrosion Inhibition Properties of Waterborne Polyurethane/Cerium Nitrate Coatings on Mild Steel

    Year: 2018

    Journal: Coatings, Volume 8, JAN

    Authors: Rahman, Mohammad Mizanur; Zahir, Md. Hasan; Haq, Md. Bashirul; Al Shehri, Dhafer A.; Kumar, A. Madhan

    Organizations: Center of Research Excellence in Corrosion (CoRE-C), King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia

    Keywords: waterborne polyurethane; corrosion; cerium nitrate; coating

    Waterborne polyurethane (WBPU)/cerium nitrate (Ce(NO3)(3)) dispersions were synthesized with different defined Ce(NO3)(3) content. All pristine dispersions were stable with different poly(tetramethylene oxide) glycol (PTMG) number average molecular weights (M-n) of 650, 1000, and 2000. The interaction between the carboxyl acid salt group and Ce(NO3)(3) was analyzed by Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) techniques. Coating hydrophilicity, water swelling (%), water contact angle, leaching, and corrosion protection efficiency were all affected when using different Ce(NO3)(3) content and PTMG molecular weights. The maximal corrosion protection of the WBPU coating was recorded using a higher molecular weight of PTMG with 0.016 mole Ce(NO3)(3) content.
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