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

DOI:

https://doi.org/10.3126/bibechana.v10i0.8363

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

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

Issue

Vol. 10 (2014)

Section

Research Articles

License

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