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Oxidation-resistant Coatings For Molybdenum

Report Number: WADC TR 54-492
Author: Blanchard, J. R.
Corporate Author: Climax Molybdenum Company Of Michigan
Date of Publication: 1954-12
Pages: 65
PB Number: PB111965
AD Number: AD0073929
Original AD Number: 73929

Sprayed-metal coatings, applied with commercial metallizing equipment, for the protection of molybdenum against oxidation at 1700 and 1800 F were tested and evaluated. The procedures employed for applying and testing coatings are described. Tests with electroplated chromium coatings are also included. The results obtained and summarized in this report showed that 12 of the oxidation-resistant alloys investigated had the capacity to protect molybdenum against oxidation for at least 500 hours at 1700 and 1800 F. Two aluminum-chromium-silicon alloy coatings and a Colmonoy No. 5 coating were investigated more thoroughly than other compositions. These coatings had the capacity to protect molybdenum from oxidation while sustaining elongations of 2-5% in 100 or 500 hours at 1800 F. They were capable of withstanding a fair amount of thermal shock and could be ground to a smooth finish.

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