Development of Zn-SiC composite coatings: Electrochemical corrosion studies

  • Mudigere Krishnegowda Punith Kumar Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
  • Thimmappa Venkatarangaiah Venkatesha Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
  • Mudigere Krishnegowda Pavithra Department of Chemistry, Kuvempu University, Shankaraghatta-577451, Shimoga, Karnataka, India
Keywords: SiC nanoparticles, Electrodeposition, Zn-SiC composite coatings, Corrosion

Abstract

The Zn-SiC composite coatings were fabricated by using sulphate plating bath dispersed with 1, 2 and 3 g L-1 of 64.28 nm SiC nanoparticles. Appreciable influence on morphology and microstructure was observed in scanning electron microscopy, X-ray diffraction spectroscopy and texture co-efficient calculations for SiC incorporated zinc coatings. The electrochemical corrosion behavior of zinc and Zn-SiC composite coatings was studied by potentiodynamic polarization and electrochemical impedance analysis. Significant reduction in corrosion current and corrosion rate with increased charge transfer resistance was noticed for composite coatings. The SiC incorporated zinc coatings shown improved micro-hardness property to pure zinc coating. The properties of Zn-SiC composite coatings were compared with that of pure zinc coating.

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Published
15-03-2015
Section
Electrochemical Science