|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Surface Engineering for Improved Corrosion Resistance
||Aqueous Corrosion Behaviour of Pulse Electrodeposited Nanocrystalline Ni-W and Ni-W/SiC Nanocomposite Coatings
||Sundararajan Govindan, Nitin Wasekar, Vamsi M.V.N
|On-Site Speaker (Planned)
The present study is concerned with the evaluation of aqueous corrosion behaviour of pulse electrodeposited Ni-W and Ni-W/SiC coatings both in as-deposited and heat treated state. A wide range of W content ranging from 0 at.% to 25 at.% was obtained with grain size decreasing with an increase in W content, since W acts like a grain growth inhibitor. Potentiodynamic polarization test was performed on these coatings in de-aerated 3.5 (wt. %) (~ 0.6 M) NaCl solution of pH = 7. Furthermore, to understand the effect of heat treatment on the corrosion behaviour, coatings were annealed at 700 oC for 1 h in vacuum. Heat treatment resulted in the crystallization of amorphous phase and precipitation of secondary phases. The relative corrosion resistance of PED Ni, PED Ni-W and PED Ni-W/SiC in both as deposited and heat treated conditions will be presented.
||Planned: Supplemental Proceedings volume