The effect of tantalum addition on the corrosion behavior of W-xTa alloys in 1 M NaOH solution

Authors

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

Keywords:

Sputter-deposited W-xTa alloys, Corrosion rate, Corrosion potential, NaOH solution, Electrochemical measurement

Abstract

The role of tantalum addition on the corrosion behavior of the sputter-deposited nanocrystalline and amorphous W-xTa (x=8-77) alloys was studied in 1 M NaOH solution open to air at 25°C using corrosion tests and electrochemical measurements. Tungsten and tantalum metals act synergistically in enhancing the corrosion resistant properties of the W-xTa alloys and hence addition of 23 at% or more tantalum to the alloys were found to be effective to lower the corrosion rate of the alloys than those of alloy-constituting tungsten and tantalum elements. The corrosion rates of the W-xTa alloys containing 23-77 at% tantalum are nearly two orders of magnitude lower than that of tungsten and even slightly lower than that of tantalum in 1 M NaOH. Addition of tantalum metal in W-xTa alloys is effective for ennoblement of the open circuit corrosion potential of the tungsten metal in 1 M NaOH solution 25°C.

DOI: http://dx.doi.org/10.3126/bibechana.v10i0.8363

BIBECHANA 10 (2014) 1-8

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Author Biography

Jagadeesh Bhattarai, Central Department of Chemistry, Tribhuvan University, Kathmandu

Professor

Central Department of Chemistry, Tribhuvan University,

GPO Box 2040, Kathmandu, Nepal.

Tel.: +(977)-1433-2034 (O); +(977)-14333746 (R); Mobile: +(977)-9841609766

 

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Published

2013-10-31

How to Cite

The effect of tantalum addition on the corrosion behavior of W-xTa alloys in 1 M NaOH solution. (2013). BIBECHANA, 10, 1-8. https://doi.org/10.3126/bibechana.v10i0.8363

Issue

Vol. 10 (2014)

Section

Research Articles

License

This license enables reusers to distribute, remix, adapt, and build upon the material in any medium or format for noncommercial purposes only, and only so long as attribution is given to the creator.

How to Cite

The effect of tantalum addition on the corrosion behavior of W-xTa alloys in 1 M NaOH solution. (2013). BIBECHANA, 10, 1-8. https://doi.org/10.3126/bibechana.v10i0.8363

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