The Corrosion Behaviour of Sputter-Deposited Nanocrystalline W-Mo Alloys in Neutral Medium

摘要

We investigated the corrosion behavior of sputter-deposited nanocrystalline W-Mo alloys with different atomic percentage in neutral medium at 25C, open to air, by electrochemical measurements including weight loss method. We found comparatively low/high corrosion rate of W-Mo alloys having more/less percentage composition of tungsten. The open circuit potential and potentiostatic polarization measurements of such alloys estimated comparatively very short time required to achieve steady state, indicating rapid development of highly adherent and very stable thin oxide anodic passive film having high protective quality. The molybdenum enriched W-83Mo alloy demonstrates an active-passive transition with very narrow passive region and transpassive dissolution.