%0 Journal Article
%T The effect of tantalum addition on the corrosion behavior of W-xTa alloys in 1 M NaOH solution
%A Susil Baral
%A Jagadeesh Bhattarai
%J BIBECHANA
%P 1-8
%@ 2382-5340
%D 2014
%R 10.3126/bibechana.v10i0.8363
%X 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
%K Sputter-deposited W-xTa alloys
%K Corrosion rate
%K Corrosion potential
%K NaOH solution
%K Electrochemical measurement
%U http://www.nepjol.info/index.php/BIBECHANA/article/view/8363