Electrochemical and adhesion properties of hydrothermally deposited nano-ZrO2 coatings on oxide layers of stainless steel

Nidhi Garg, Santanu Bera, G. Mangamma, C. R. Das, S. Kamaruddin, S. Velmurugan

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

ZrO2 coatings on pre-oxidized stainless steel (304L) surfaces have been developed by hydrothermal process and the coating adhesion and corrosion resistance properties of the coated specimens have been studied. The role of pre-oxidized SS surfaces composed of different oxides like spinels and alpha-Fe2O3 with different morphologies has been studied. The thicknesses of the ZrO2 coatings are in the range of 50 nm to 350 nm depending upon the compositions of the pre-oxidized layers. The coating is thick and compact when developed on alpha-Fe2O3 with high surface roughness and shows the best corrosion resistance properties. ZrO2 coatings developed on large size spinel oxides are thin and porous. The nano-mechanical properties and the local adhesion force have been studied by atomic force acoustic microscopy and force-distance spectroscopy. The adhesion force of ZrO2 coating on alpha-Fe2O3 is around 100 nN while for the coatings developed on other pre-oxidized surfaces are around 50 nN. (C) 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalSurface and Coatings Technology
Volume281
Pages (from-to)98-108
ISSN0257-8972
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Atomic force microscopy
  • Potentiodynamic polarization
  • ZrO2 coating
  • α-Fe2O3

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