Tungsten Chemical Vapor Deposited on a Molybdenum Crucible to Provide Corrosion Protection from Molten Zinc

摘要

Tungsten was chemical vapor deposited (CVD) on a molybdenum crucible to provide corrosion protection from an 800 exp 0 C bath of zinc and potassium-calcium chloride. The desired corrosion protection was obtained; however, stress cracks developed in the tungsten and some corrosion was evident after 300 hours of exposure. These shortcomings indicate the CVD tungsten coating has a limited life. (ERA citation 07:011264)