The Corrosion Behavior of Sputter?deposited W?xTa Alloys in 0.5 M NaCl Solution

Authors

  • Jagadeesh Bhattarai Central Department of Chemistry Tribhuvan University, Kathmandu
  • Susil Baral Central Department of Chemistry Tribhuvan University, Kathmandu

DOI:

https://doi.org/10.3126/njst.v14i1.8929

Keywords:

Sputter deposition, corrosion test, electrochemical measurement

Abstract

The corrosion behavior of the sputter–deposited amorphous and nanocrystalline W–xTa (x = 8–77) alloys was studied in 0.5 M NaCl solution open to air at 25°C using corrosion tests and electrochemical measurements. Tungsten and tantalum metals act synergistically in enhancing the corrosion resistance of the sputter–deposited W–xTa alloys and hence additions of 23 at. % of tantalum or more to the sputter–deposited W–xTa alloys were found to be effective to achieve significantly high corrosion resistance properties of the alloys than those of alloy– constituting elements. In particular, the corrosion rate of the W–60Ta alloy showed the lowest corrosion rate (that is, 2.0×10-3). The open circuit potential of the alloys shifted noble (positive) direction with immersion time. Addition of tantalum metal in W–xTa alloys is effective for ennoblement of the open circuit corrosion potential of the tungsten metal in 0.5 M NaCl solution open to air at 25°C.

Nepal Journal of Science and Technology Vol. 14, No. 1 (2013) 103-108

DOI: http://dx.doi.org/10.3126/njst.v14i1.8929

Downloads

Download data is not yet available.
Abstract
607
PDF
589

Downloads

Published

2013-10-14

How to Cite

Bhattarai, J., & Baral, S. (2013). The Corrosion Behavior of Sputter?deposited W?xTa Alloys in 0.5 M NaCl Solution. Nepal Journal of Science and Technology, 14(1), 103–108. https://doi.org/10.3126/njst.v14i1.8929

Issue

Section

Articles