Molybdenum Alloys Developed for Chemical Processing
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- Category: Molybdenum knowledge
- Published on 10 July 2013
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The nickel-chromium-molybdenum Haynes Hastelloy wrought alloys developed by Haynes International, Kokomo, are of vital importance to the chemical process industries in their fight against aqueous corrosion.
They excel in environments t%hat are too severe for the stainless steels, such as hot hydrochloric, hydrofluoric, hydrobromic, and sulfuric adds. in particular, they are very resistant to pitting, crevice attack.
Hastelloy 2000 alloy is the latest and most advanced of the C-type materials. It contains 23 wt percent chromium, to enhance passivation in oxidizing add media; 16 wt percent molybdenum, for high resistance to corrosion under active conditions.
And 1.6 wt percent copper, which provides significant benefits in sulfuric and hydrofluoric adds, and generally extends performance in reducing acid media.
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