Vanadium pentoxide (V2O5) is an ionic compound. It is mainly used to produce ferro vanadium, which is created by combining V2O5 with iron. Ferro vanadium is used to strengthen metals and make them anti-corrosive. Steel tools, aircraft and automobile parts are examples of ferro vanadium use.

Sources:

1. Wikipedia. Wikimedia Foundation. Web. 24 Sept. 2015. <https://en.wikipedia.org/wiki/Vanadium(V)_oxide>.

2. “Ferro Vanadium.” – Universal Strengthener & Hardener. Web. 24 Sept. 2015. <http://www.wbrl.co.uk/ferro-vanadium.html>.

Images:

http://www.coleparmer.com/Product/Vanadium_V_oxide_99_6_250g/EW-88220-99

http://www.elementalmicroanalysis.com/images/products/B4001.jpg