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Impact of hybrid self-assembled nanophase particle-based sol–gel coatings on the localized corrosion behavior of modified 9Cr–1Mo steel in chloride medium

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Abstract

Corrosion protection coatings were developed based on a hybrid self-assembled nanophase particle process (HSNAP) for the localized corrosion resistance of modified 9Cr–1Mo steel in 0.05 M NaCl solution. The coating sol was prepared using silane-zirconia precursors and a polymeric crosslinking agent. Scanning electron microscopy and X-ray photoelectron spectroscopy were used to study the morphology and composition of the coated specimens, respectively. The thickness of the coatings was determined by a thickness gauge meter and Raman imaging analysis. The corrosion resistance of coated specimens was analyzed using electrochemical impedance spectroscopy, and it was observed that HSNAP-coated specimens showed superior resistance to localized corrosion than the as-received specimens in chloride medium.

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Authors and Affiliations

  1. Corrosion Science and Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, India

    S. Ramya, C. Arunchandran, R. P. George, C. Thinaharan & U. Kamachi Mudali

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  1. S. Ramya
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  2. C. Arunchandran
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  3. R. P. George
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  4. C. Thinaharan
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  5. U. Kamachi Mudali
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Correspondence to R. P. George.

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Ramya, S., Arunchandran, C., George, R.P. et al. Impact of hybrid self-assembled nanophase particle-based sol–gel coatings on the localized corrosion behavior of modified 9Cr–1Mo steel in chloride medium. J Coat Technol Res 14, 129–140 (2017). https://doi.org/10.1007/s11998-016-9836-y

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